gocodebox/lifterlms

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includes/admin/class.llms.admin.settings.php

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<?php
/**
 * Admin Settings and fields
 *
 * @package LifterLMS/Admin/Classes
 *
 * @since 1.0.0
 * @version 7.0.0
 */

defined( 'ABSPATH' ) || exit;

/**
 * Admin settings and fields class
 *
 * @since 1.0.0
 * @since 3.29.0 Unknown.
 * @since 3.34.4 Add "keyval" field for displaying custom html next to a setting key.
 * @since 3.35.0 Sanitize input data.
 * @since 3.35.1 Fix saving issue.
 * @since 3.35.2 Don't strip tags on editor and textarea fields that allow HTML.
 * @since 3.37.9 Add option for fields to show an asterisk for required fields.
 * @since 4.2.0 Use dashicons for tooltip icon display.
 */
class LLMS_Admin_Settings {

    /**
     * Settings array
     *
     * @var array
     */
    private static $settings = array();

    /**
     * Errors array
     *
     * @var array
     */
    private static $errors = array();

    /**
     * Messages array
     *
     * @var array
     */
    private static $messages = array();

    /**
     * Instantiates setting page objects, if not already done, and returns them.
     *
     * @since 6.0.0 Removed loading of class files that don't instantiate their class in favor of autoloading.
     *
     * @return LLMS_Settings_Page[] self::$settings
     */
    public static function get_settings_tabs() {

        if ( empty( self::$settings ) ) {
            $settings = array();

            $settings[] = include 'settings/class.llms.settings.general.php';
            $settings[] = include 'settings/class.llms.settings.courses.php';
            $settings[] = include 'settings/class.llms.settings.memberships.php';
            $settings[] = include 'settings/class.llms.settings.accounts.php';
            $settings[] = include 'settings/class.llms.settings.checkout.php';
            $settings[] = include 'settings/class.llms.settings.engagements.php';
            $settings[] = include 'settings/class.llms.settings.notifications.php';
            $settings[] = include 'settings/class.llms.settings.integrations.php';

            /**
             * Allow 3rd parties to add or remove setting pages.
             *
             * @since 1.0.0
             *
             * @param LLMS_Settings_Page[] $settings Setting page objects.
             */
            self::$settings = apply_filters( 'lifterlms_get_settings_pages', $settings );
        }

        return self::$settings;
    }

    /**
     * Save method. Saves all fields on current tab
     *
     * @return void
     */
    public static function save() {

        global $current_tab;
        if ( isset( $_POST['_wpnonce'] ) && ! llms_verify_nonce( '_wpnonce', 'lifterlms-settings' ) ) {
            die( __( 'Whoa! something went wrong there!. Please refresh the page and retry.', 'lifterlms' ) );
        }

        do_action( 'lifterlms_settings_save_' . $current_tab );
        do_action( 'lifterlms_update_options_' . $current_tab );
        do_action( 'lifterlms_update_options' );

        self::set_message( __( 'Your settings have been saved.', 'lifterlms' ) );

        do_action( 'lifterlms_settings_saved' );
        do_action( 'lifterlms_settings_saved_' . $current_tab );

    }

    /**
     * set message to messages array
     *
     * @param string $message
     * @return void
     */
    public static function set_message( $message ) {
        self::$messages[] = $message;
    }

    /**
     * set message to messages array
     *
     * @param string $message
     * @return void
     */
    public static function set_error( $message ) {
        self::$errors[] = $message;
    }

    /**
     * display messages in settings
     *
     * @return void
     */
    public static function display_messages_html() {

        if ( count( self::$errors ) > 0 ) {

            foreach ( self::$errors as $error ) {
                echo '<div class="error"><p><strong>' . $error . '</strong></p></div>';
            }
        } elseif ( count( self::$messages ) > 0 ) {

            foreach ( self::$messages as $message ) {
                echo '<div class="updated"><p><strong>' . $message . '</strong></p></div>';
            }
        }
    }

    /**
     * Settings Page output tabs
     *
     * @since 1.0.0
     * @since 3.29.0 Unknown.
     * @since 3.35.0 Sanitize `$_GET` data.
     * @since 3.35.1 Fix issue causing data to be saved on every page load.
     * @since 5.9.0 Stop using deprecated `FILTER_SANITIZE_STRING`.
     *
     * @return void
     */
    public static function output() {

        global $current_tab;

        do_action( 'lifterlms_settings_start' );

        self::get_settings_tabs();

        // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- nonce is checked in self::save().
        $current_tab = empty( $_GET['tab'] ) ? 'general' : llms_filter_input_sanitize_string( INPUT_GET, 'tab' );

        // phpcs:disable WordPress.Security.NonceVerification.Missing -- nonce is checked in self::save().
        if ( ! empty( $_POST ) ) {
            self::save();
        }
        // phpcs:enable WordPress.Security.NonceVerification.Missing.

        $err = llms_filter_input_sanitize_string( INPUT_GET, 'llms_error' );
        if ( $err ) {
            self::set_error( $err );
        }

        $msg = llms_filter_input_sanitize_string( INPUT_GET, 'llms_message' );
        if ( $msg ) {
            self::set_message( $msg );
        }

        self::display_messages_html();

        $tabs = apply_filters( 'lifterlms_settings_tabs_array', array() );

        include 'views/settings.php';

    }

    /**
     * Output fields for settings tabs. Dynamically generates fields.
     *
     * Needs to be refactored! Sets up all of the fields..gross...
     *
     * @return void
     */
    public static function output_fields( $settings ) {

        foreach ( $settings as $field ) {

            // Skip item if no field type is set.
            if ( ! isset( $field['type'] ) ) {
                continue; }

            // Output the field.
            self::output_field( $field );

        }
    }


    /**
     * Output fields
     *
     * @since Unknown.
     * @since 3.29.0 Unknown.
     * @since 3.34.4 Add "keyval" field for displaying custom html next to a setting key.
     * @since 3.37.9 Add option for fields to show an asterisk for required fields.
     * @since 5.0.2 Pass any option value sanitized as a "slug" through `urldecode()` prior to displaying it.
     * @since 7.0.0 Add `$after_html` to all field types.
     *
     * @param array $field {
     *     Array of field settings.
     *
     *     @type string $id                The setting ID. Used as the from element's `name` and `id` attributes and
     *                                     automatically correspond to an option key using the WP options API.
     *     @type string $type              The field type. Accepts: 'title', 'table', 'subtitle', 'desc', 'custom-html',
     *                                     'custom-html-no-wrap', 'sectionstart', 'sectionend', 'button', 'hidden', 'keyval',
     *                                     'text', 'email', 'number', 'password', 'textarea', 'wpeditor', 'select', 'multiselect',
     *                                     'radio', 'checkbox', 'image', 'single_select_page', 'single_select_membership'.
     *     @type string $title             The title / name of the option as displayed to the user.
     *     @type string $name              For "button" fields only: used as HTML `name` attribute. If not supplied the default
     *                                     value "save" will be used. For other field types used as a fallback for `$title` if
     *                                     no value is supplied.
     *     @type string $class             A space-separated list of CSS class names to apply the setting form element (the
     *                                     `<input>`, `<select>` etc...).
     *     @type string $css               An inline CSS style string.
     *     @type string $default           The default value of the setting.
     *     @type string $desc              The setting's description.
     *     @type bool   $desc_tooltip      If `true`, displays `$desc` in a hoverable tooltip.
     *     @type string $value             The value of the setting. If supplied this will override the automatic setting retrieval
     *                                     using `get_option( $id, $default )`.
     *     @type array  $custom_attributes An associative array of custom HTML attributes to be added to the form element (the
     *                                     `<input>`, `<select>` etc...).
     *     @type bool   $disabled          If `true` adds the `llms-disabled-field` class to the settings field wrapper.
     *     @type bool   $required          If `true`, text, email, number, and password fields will require user input.
     *     @type string $secure_option     The name of settings secure option equivalent. If specified, the fields value will be
     *                                     automatically removed from the database and the value will be masked when displayed on
     *                                     on screen. See {@see llms_get_secure_option()} for more information.
     *     @type string $sanitize          Automatically apply the specified sanitization to the value before storing and outputting
     *                                     the stored value. Supported filters:
     *                                       + "slug": Uses `sanitize_title()` on the value when storing and `urldecode()` when displaying.
     *     @type string $after_html        Additional HTML to add after the field's form element.
     *     @type array  $editor_settings   Used with "wpeditor" field type only. An array of options to pass to `wp_editor()` as the `$settings` argument.
     *     @type array  $options           For "select", "multiselect", and "radio" fields, an array of key/value pairs where the
     *                                     key is the setting value stored in database and the value is the setting label displayed
     *                                     on screen.
     * }
     * @return void
     */
    public static function output_field( $field ) {

        // Set missing values with defaults.
        $field = self::set_field_defaults( $field );

        // Setup custom attributes.
        $custom_attributes = self::format_field_custom_attributes( $field['custom_attributes'] ?? array() );

        // Setup field description and tooltip.
        extract( self::set_field_descriptions( $field ) );
        $description .= ' ' . $field['after_html'];

        // Get the field value.
        $option_value = isset( $field['value'] ) ? $field['value'] : self::get_option( $field['id'], $field['default'] );

        // Setup the disabled CSS class.
        $disabled_class = ( isset( $field['disabled'] ) && true === $field['disabled'] ) ? 'llms-disabled-field' : '';

        // Switch based on type.
        switch ( $field['type'] ) {

            // Section Titles.
            case 'title':
                if ( ! empty( $field['title'] ) ) {
                    echo '<p class="llms-label">' . esc_html( $field['title'] ) . '</p>';
                }
                if ( ! empty( $field['desc'] ) ) {
                    echo '<p class="llms-description">' . wpautop( wptexturize( wp_kses_post( $field['desc'] ) ) ) . '</p>';
                }

                echo '<table class="form-table">' . "\n\n";

                if ( ! empty( $field['id'] ) ) {

                    do_action( 'lifterlms_settings_' . sanitize_title( $field['id'] ) );

                }
                break;

            case 'table':
                echo '<tr valign="top" class="' . $disabled_class . '"><td>';

                    $field['table']->get_results();
                    echo $field['table']->get_table_html();

                echo '</td></tr>';
                break;

            case 'subtitle':
                if ( ! empty( $field['title'] ) ) {
                    echo '<tr valign="top" class="' . $disabled_class . '"><td colspan="2">
                        <h3 class="llms-subtitle">' . $field['title'] . '</h3>';
                    if ( ! empty( $field['desc'] ) ) {
                        echo '<p>' . $field['desc'] . '</p>';
                    }
                    echo '</tr></td>';
                }
                break;

            case 'desc':
                if ( ! empty( $field['desc'] ) ) {
                    echo '<th colspan="2" style="font-weight: normal;">' . wpautop( wptexturize( wp_kses_post( $field['desc'] ) ) ) . '</th>';
                }

                break;

            case 'custom-html':
                if ( ! empty( $field['value'] ) ) {
                    echo '<tr valign="top" class="' . $disabled_class . '"><td colspan="2">' . $field['value'] . '</tr></td>';
                }
                break;

            case 'custom-html-no-wrap':
                if ( ! empty( $field['value'] ) ) {
                    echo $field['value'];
                }
                break;

            case 'sectionstart':
                if ( ! empty( $field['id'] ) ) {

                    do_action( 'lifterlms_settings_' . sanitize_title( $field['id'] ) . '_before' );

                    echo '<div class="llms-setting-group ' . $field['class'] . '">';

                    do_action( 'lifterlms_settings_' . sanitize_title( $field['id'] ) . '_start' );

                }
                break;

            case 'sectionend':
                if ( ! empty( $field['id'] ) ) {

                    do_action( 'lifterlms_settings_' . sanitize_title( $field['id'] ) . '_end' );

                }

                echo '</table>';
                echo '</div>';

                if ( ! empty( $field['id'] ) ) {

                    do_action( 'lifterlms_settings_' . sanitize_title( $field['id'] ) . '_after' );

                }
                break;

            case 'button':
                $name = isset( $field['name'] ) ? $field['name'] : 'save';

                echo '<tr valign="top" class="' . $disabled_class . '"><th>
                    <label for="' . esc_attr( $field['id'] ) . '">' . esc_html( $field['title'] ) . '</label>
                        ' . $tooltip . '
                </th>';

                echo '<td class="forminp forminp-' . sanitize_title( $field['type'] ) . '">';
                echo '<div id="llms-form-wrapper">';
                echo $description . '<br><br>';
                echo '<input name="' . $name . '" class="llms-button-primary" type="submit" value="' . esc_attr( $field['value'] ) . '" />';
                echo '</div>';
                echo '</td></tr>';
                // phpcs:ignore -- commented out code
                // get_submit_button( 'Filter Results', 'primary', 'llms_search', true, array( 'id' => 'llms_analytics_search' ) );
                break;

            case 'hidden':
                echo '<th></th>';
                echo '<td><input type="hidden"
                    name="' . esc_attr( $field['id'] ) . '"
                    id="' . esc_attr( $field['id'] ) . '"
                    value="' . esc_attr( $field['value'] ) . '">';
                break;

            case 'keyval':
                ?><tr valign="top">
                    <th>
                        <label for="<?php echo esc_attr( $field['id'] ); ?>"><?php echo esc_html( $field['title'] ); ?></label>
                        <?php echo $tooltip; ?>
                    </th>
                    <td class="forminp forminp-<?php echo sanitize_title( $field['type'] ); ?>">
                        <div id="<?php echo esc_attr( $field['id'] ); ?>"><?php echo $field['value']; ?></div>
                    </td>
                </tr>
                <?php

                break;

            case 'text':
            case 'email':
            case 'number':
            case 'password':
                $type     = $field['type'];
                $class    = '';
                $required = ! empty( $field['required'] );

                $secure_val   = isset( $field['secure_option'] ) ? llms_get_secure_option( $field['secure_option'], false ) : false;
                $option_value = ( false !== $secure_val ) ? str_repeat( '*', strlen( $secure_val ) ) : $option_value;

                // Ensure slugs with non-latin characters are not displayed as urlencoded strings.
                if ( ! empty( $field['sanitize'] ) && 'slug' === $field['sanitize'] ) {
                    $option_value = urldecode( $option_value );
                }

                ?>
                <tr valign="top" class="<?php echo $disabled_class; ?>">
                    <th>
                        <label for="<?php echo esc_attr( $field['id'] ); ?>">
                            <?php echo esc_html( $field['title'] ); ?>
                            <?php echo $required ? '<span class="llms-required">*</span>' : ''; ?>
                        </label>
                        <?php echo $tooltip; ?>
                    </th>
                    <td class="forminp forminp-<?php echo sanitize_title( $field['type'] ); ?>">
                        <input
                            name="<?php echo esc_attr( $field['id'] ); ?>"
                            id="<?php echo esc_attr( $field['id'] ); ?>"
                            type="<?php echo esc_attr( $type ); ?>"
                            style="<?php echo esc_attr( $field['css'] ); ?>"
                            value="<?php echo esc_attr( $option_value ); ?>"
                            class="<?php echo esc_attr( $field['class'] ); ?>"
                            <?php echo $secure_val ? 'disabled="disabled"' : ''; ?>
                            <?php echo implode( ' ', $custom_attributes ); ?>
                            <?php echo $required ? 'required="required"' : ''; ?>
                            /> <?php echo $description; ?>
                    </td>
                </tr>
                <?php
                break;

            // Textarea.
            case 'textarea':
                ?>
                <tr valign="top" class="<?php echo $disabled_class; ?>">
                    <th>
                        <label for="<?php echo esc_attr( $field['id'] ); ?>"><?php echo esc_html( $field['title'] ); ?></label>
                        <?php echo $tooltip; ?>
                    </th>
                    <td class="forminp forminp-<?php echo sanitize_title( $field['type'] ); ?>">
                        <textarea
                            name="<?php echo esc_attr( $field['id'] ); ?>"
                            id="<?php echo esc_attr( $field['id'] ); ?>"
                            style="<?php echo esc_attr( $field['css'] ); ?>"
                            class="<?php echo esc_attr( $field['class'] ); ?>"
                            <?php echo implode( ' ', $custom_attributes ); ?>
                            ><?php echo esc_textarea( $option_value ); ?></textarea>
                        <?php echo $description; ?>
                    </td>
                </tr>
                <?php
                break;

            case 'wpeditor':
                $editor_settings = isset( $field['editor_settings'] ) ? $field['editor_settings'] : array();
                ?>
                <tr valign="top" class="<?php echo $disabled_class; ?>">
                    <th>
                        <label for="<?php echo esc_attr( $field['id'] ); ?>"><?php echo esc_html( $field['title'] ); ?></label>
                        <?php echo $tooltip; ?>
                    </th>
                    <td class="forminp forminp-<?php echo sanitize_title( $field['type'] ); ?>">
                        <?php wp_editor( $option_value, $field['id'], $editor_settings ); ?>
                        <?php echo $description; ?>
                    </td>
                </tr>
                <?php
                break;

            // Select boxes.
            case 'select':
            case 'multiselect':
                $field_name = esc_attr( $field['id'] );
                if ( 'multiselect' === $field['type'] ) {
                    $field_name .= '[]';
                }
                ?>
                <tr valign="top" class="<?php echo $disabled_class; ?>">
                    <th>
                        <label for="<?php echo esc_attr( $field['id'] ); ?>"><?php echo esc_html( $field['title'] ); ?></label>
                        <?php echo $tooltip; ?>
                    </th>
                    <td class="forminp forminp-<?php echo sanitize_title( $field['type'] ); ?>">
                        <select
                            name="<?php echo $field_name; ?>"
                            id="<?php echo esc_attr( $field['id'] ); ?>"
                            style="<?php echo esc_attr( $field['css'] ); ?>"
                            class="<?php echo esc_attr( $field['class'] ); ?>"
                            <?php echo implode( ' ', $custom_attributes ); ?>
                            <?php
                            if ( 'multiselect' === $field['type'] ) {
                                echo 'multiple="multiple"'; }
                            ?>
                            >
                            <?php
                            foreach ( $field['options'] as $key => $val ) {

                                // Convert an array from llms_make_select2_post_array().
                                if ( is_array( $val ) ) {
                                    $key = $val['key'];
                                    $val = $val['title'];
                                }

                                ?>
                                <option value="<?php echo esc_attr( $key ); ?>"
                                <?php
                                if ( is_array( $option_value ) ) {
                                    selected( in_array( $key, $option_value ), true );
                                } else {
                                    selected( $option_value, $key );
                                }
                                ?>
                                ><?php echo $val; ?></option>
                                <?php
                            }
                            ?>
                            </select>
                        <?php echo $description; ?>
                    </td>
                </tr>
                <?php
                break;

            // Radio inputs.
            case 'radio':
                ?>
                <tr valign="top" class="<?php echo $disabled_class; ?>">
                    <th>
                        <label for="<?php echo esc_attr( $field['id'] ); ?>"><?php echo esc_html( $field['title'] ); ?></label>
                        <?php echo $tooltip; ?>
                    </th>
                    <td class="forminp forminp-<?php echo sanitize_title( $field['type'] ); ?>">
                        <fieldset>
                            <?php echo $description; ?>
                            <ul>
                            <?php
                            foreach ( $field['options'] as $key => $val ) {
                                ?>
                                <li>
                                    <label><input
                                        name="<?php echo esc_attr( $field['id'] ); ?>"
                                        value="<?php echo $key; ?>"
                                        type="radio"
                                        style="<?php echo esc_attr( $field['css'] ); ?>"
                                        class="<?php echo esc_attr( $field['class'] ); ?>"
                                        <?php echo implode( ' ', $custom_attributes ); ?>
                                        <?php checked( $key, $option_value ); ?>
                                        /> <?php echo $val; ?></label>
                                    </li>
                                    <?php
                            }
                            ?>
                            </ul>
                        </fieldset>
                    </td>
                </tr>
                <?php
                break;

            // Checkbox input.
            case 'checkbox':
                $visbility_class = array();

                if ( ! isset( $field['hide_if_checked'] ) ) {
                    $field['hide_if_checked'] = false;
                }
                if ( ! isset( $field['show_if_checked'] ) ) {
                    $field['show_if_checked'] = false;
                }
                if ( 'yes' === $field['hide_if_checked'] || 'yes' === $field['show_if_checked'] ) {
                    $visbility_class[] = 'hidden_option';
                }
                if ( 'option' === $field['hide_if_checked'] ) {
                    $visbility_class[] = 'hide_options_if_checked';
                }
                if ( 'option' === $field['show_if_checked'] ) {
                    $visbility_class[] = 'show_options_if_checked';
                }
                if ( ! isset( $field['checkboxgroup'] ) || 'start' === $field['checkboxgroup'] ) {
                    ?>
                        <tr valign="top" class="<?php echo esc_attr( implode( ' ', $visbility_class ) ); ?> <?php echo $disabled_class; ?>">
                            <th><?php echo esc_html( $field['title'] ); ?></th>
                            <td class="forminp forminp-checkbox">
                                <fieldset>
                    <?php
                } else {
                    ?>
                        <fieldset class="<?php echo esc_attr( implode( ' ', $visbility_class ) ); ?>">
                    <?php
                }

                if ( ! empty( $field['title'] ) ) {
                    ?>
                        <legend class="screen-reader-text"><span><?php echo esc_html( $field['title'] ); ?></span></legend>
                    <?php
                }

                ?>
                    <label for="<?php echo $field['id']; ?>">
                        <input
                            name="<?php echo esc_attr( $field['id'] ); ?>"
                            id="<?php echo esc_attr( $field['id'] ); ?>"
                            type="checkbox"
                            value="1"
                            <?php checked( $option_value, 'yes' ); ?>
                            <?php echo implode( ' ', $custom_attributes ); ?>
                        /> <?php echo $description; ?>
                    </label> <?php echo $tooltip; ?>
                <?php

                if ( ! isset( $field['checkboxgroup'] ) || 'end' === $field['checkboxgroup'] ) {
                    ?>
                                </fieldset>
                            </td>
                        </tr>
                    <?php
                } else {
                    ?>
                        </fieldset>
                    <?php
                }
                break;

            case 'image':
                $type  = $field['type'];
                $class = '';

                if ( $option_value ) {
                    // Media lib object ID.
                    if ( is_numeric( $option_value ) ) {
                        $size       = isset( $field['image_size'] ) ? $field['image_size'] : 'medium';
                        $attachment = wp_get_attachment_image_src( $option_value, $size );
                        $src        = $attachment[0];
                    } else {
                        // Raw img src.
                        $src = $option_value;
                    }
                } else {
                    $src = '';
                }

                ?>
                <tr valign="top" class="<?php echo $disabled_class; ?>">
                    <th>
                        <label for="<?php echo esc_attr( $field['id'] ); ?>"><?php echo esc_html( $field['title'] ); ?></label>
                        <?php echo $tooltip; ?>
                    </th>
                    <td class="forminp forminp-<?php echo sanitize_title( $field['type'] ); ?>">

                        <img class="llms-image-field-preview" src="<?php echo $src; ?>">
                        <button class="llms-button-secondary llms-image-field-upload" data-id="<?php echo esc_attr( $field['id'] ); ?>" type="button">
                            <span class="dashicons dashicons-admin-media"></span>
                            <?php _e( 'Upload', 'lifterlms' ); ?>
                        </button>
                        <button class="llms-button-danger llms-image-field-remove<?php echo ( ! $src ) ? ' hidden' : ''; ?>" data-id="<?php echo esc_attr( $field['id'] ); ?>" type="button">
                            <span class="dashicons dashicons-no"></span>
                        </button>
                        <input
                            name="<?php echo esc_attr( $field['id'] ); ?>"
                            id="<?php echo esc_attr( $field['id'] ); ?>"
                            type="hidden"
                            style="<?php echo esc_attr( $field['css'] ); ?>"
                            value="<?php echo esc_attr( $option_value ); ?>"
                            class="<?php echo esc_attr( $field['class'] ); ?>"
                            <?php echo implode( ' ', $custom_attributes ); ?>
                            /> <?php echo $description; ?>
                    </td>
                </tr>
                <?php
                break;

            // Single page selects.
            case 'single_select_page':
                $args = array(
                    'name'             => $field['id'],
                    'id'               => $field['id'],
                    'sort_column'      => 'menu_order',
                    'sort_order'       => 'ASC',
                    'show_option_none' => ' ',
                    'class'            => $field['class'],
                    'echo'             => false,
                    'selected'         => absint( self::get_option( $field['id'] ) ),
                );

                if ( isset( $field['args'] ) ) {
                    $args = wp_parse_args( $field['args'], $args );
                }

                ?>
                <tr valign="top" class="single_select_page">
                    <th><?php echo esc_html( $field['title'] ); ?> <?php echo $tooltip; ?></th>
                    <td class="forminp">
                        <?php echo str_replace( ' id=', " data-placeholder='" . __( 'Select a page&hellip;', 'lifterlms' ) . "' style='" . $field['css'] . "' class='" . $field['class'] . "' id=", wp_dropdown_pages( $args ) ); ?> <?php echo $description; ?>
                    </td>
                </tr>
                <?php
                break;

            // Single page selects.
            case 'single_select_membership':
                $args  = array(
                    'posts_per_page' => -1,
                    'post_type'      => 'llms_membership',
                    'nopaging'       => true,
                    'post_status'    => 'publish',
                    'class'          => $field['class'],
                    'selected'       => absint( self::get_option( $field['id'] ) ),
                );
                $posts = get_posts( $args );

                if ( isset( $field['args'] ) ) {
                    $args = wp_parse_args( $field['args'], $args );
                }

                ?>
                <tr valign="top" class="single_select_membership">
                    <th><?php echo esc_html( $field['title'] ); ?> <?php echo $tooltip; ?></th>
                    <td class="forminp">
                        <select class="<?php echo $args['class']; ?>" style="<?php echo $field['css']; ?>" name="lifterlms_membership_required" id="lifterlms_membership_required">
                            <option value=""> <?php _e( 'None', 'lifterlms' ); ?></option>
                            <?php
                            foreach ( $posts as $post ) :
                                setup_postdata( $post );
                                if ( $args['selected'] === $post->ID ) {
                                    $selected = 'selected';
                                } else {
                                    $selected = '';
                                }
                                ?>
                            <option value="<?php echo $post->ID; ?>" <?php echo $selected; ?> ><?php echo $post->post_title; ?></option>
                        <?php endforeach; ?>
                        </select>
                    </td>
                </tr>
                <?php
                break;

            // Default: run an action.
            default:
                do_action( 'lifterlms_admin_field_' . $field['type'], $field, $option_value, $description, $tooltip, $custom_attributes );

                break;
        }

    }

    /**
     * Add and set default values for a field when looping
     *
     * @since 1.4.5
     * @since 7.0.0 Use `wp_parse_args()` to simplify method logic & add `after_html` default.
     *
     * @param array $field Associative array of field data, {@see LLMS_Admin_Settings::output_field()} for a full description.
     * @return array
     */
    public static function set_field_defaults( $field = array() ) {

        $field = wp_parse_args(
            $field,
            array(
                'id'           => '',
                'title'        => $field['name'] ?? '',
                'class'        => '',
                'css'          => '',
                'default'      => '',
                'desc'         => '',
                'desc_tooltip' => '',
                'after_html'   => '',
            )
        );

        return $field;

    }

    /**
     * Setup a field's tooltip and description based on supplied values
     *
     * @since 1.4.5
     * @since 3.24.0 Unknown.
     * @since 4.2.0 Use a dashicon in place of image for tooltip icon.
     *
     * @param array $field Associative array of field data.
     * @return array {
     *     Associative array containing field description and tooltip HTML.
     *
     *     @type string $description Description element HTML.
     *     @type string $tooltip     Tooltip element HTML.
     * }
     */
    public static function set_field_descriptions( $field = array() ) {

        $description = '';
        $tooltip     = '';

        if ( true === $field['desc_tooltip'] ) {

            $description = '';
            $tooltip     = $field['desc'];

        } elseif ( ! empty( $field['desc_tooltip'] ) ) {

            $description = $field['desc'];
            $tooltip     = $field['desc_tooltip'];

        } elseif ( ! empty( $field['desc'] ) ) {

            $description = $field['desc'];
            $tooltip     = '';

        }

        if ( $description && in_array( $field['type'], array( 'radio' ), true ) ) {

            $description = '<p style="margin-top:0">' . wp_kses_post( $description ) . '</p>';

        } elseif ( $description && in_array( $field['type'], array( 'checkbox' ), true ) ) {

            $description = wp_kses_post( $description );

        } elseif ( $description ) {

            $description = '<p class="description">' . wp_kses_post( $description ) . '</p>';
        }

        if ( $tooltip && in_array( $field['type'], array( 'checkbox' ), true ) ) {

            $tooltip = '<p class="description">' . $tooltip . '</p>';

        } elseif ( $tooltip ) {

            $position = isset( $field['tooltip_position'] ) ? $field['tooltip_position'] : 'top-right';
            $tooltip  = '<span class="llms-help-tooltip tip--' . esc_attr( $position ) . '" data-tip="' . esc_attr( $tooltip ) . '"><span class="dashicons dashicons-editor-help"></span></span>';

        }

        return compact( 'description', 'tooltip' );

    }

    /**
     * Formats an associative array of custom field attributes as an array of HTML strings
     *
     * @param  array $attributes   associative array of attributes
     * @return array
     *
     * @since  1.4.5
     */
    public static function format_field_custom_attributes( $attributes = array() ) {

        // Custom attribute handling.
        $custom_attributes = array();
        foreach ( $attributes as $attribute => $attribute_value ) {

            $custom_attributes[] = esc_attr( $attribute ) . '="' . esc_attr( $attribute_value ) . '"';

        }

        return $custom_attributes;

    }


    /**
     * Get a setting from the settings API.
     *
     * @since Unknown
     * @since 3.7.5 Unknown
     *
     * @param string $option_name Option name.
     * @param mixed  $default     Optional default value.
     * @return string
     */
    public static function get_option( $option_name, $default = '' ) {
        // Array value.
        if ( strstr( $option_name, '[' ) ) {

            parse_str( $option_name, $option_array );

            // Option name is first key.
            $option_name = current( array_keys( $option_array ) );

            // Get value.
            $option_values = get_option( $option_name, '' );

            $key = key( $option_array[ $option_name ] );

            if ( isset( $option_values[ $key ] ) ) {
                $option_value = $option_values[ $key ];
            } else {
                $option_value = null;
            }
        } else {
            $option_value = get_option( $option_name, null );
        }

        if ( is_array( $option_value ) ) {
            $option_value = array_map( 'stripslashes', $option_value );
        } elseif ( ! is_null( $option_value ) ) {
            $option_value = stripslashes( $option_value );
        }

        return null === $option_value ? $default : $option_value;

    }

    /**
     * Save admin fields.
     *
     * Loops through a LifterLMS settings field options array and saves the values via `update_option()`.
     *
     * @since 1.0.0
     * @since 3.29.0 Unknown.
     * @since 3.35.0 Sanitize `$_POST` data.
     * @since 3.35.2 Don't strip tags on editor and textarea fields that allow HTML.
     * @since 5.9.0 Stop using deprecated `FILTER_SANITIZE_STRING`.
     * @since 7.0.0 Add handling for array fields for standard input types.
     *              Account for the `maxlength` input text and textarea attribute.
     *
     * @param array $settings Opens array to output
     * @return boolean
     */
    public static function save_fields( $settings ) {

        // phpcs:disable WordPress.Security.NonceVerification.Missing -- nonce is checked in self::save().
        if ( empty( $_POST ) ) {
            return false;
        }

        // Options to update will be stored here.
        $update_options = array();

        // Loop options and get values to save.
        foreach ( $settings as $field ) {

            if ( ! isset( $field['id'] ) ) {
                continue;
            }

            $type = isset( $field['type'] ) ? sanitize_title( $field['type'] ) : '';

            // Remove secure options from the database.
            if ( isset( $field['secure_option'] ) && llms_get_secure_option( $field['secure_option'] ) ) {
                delete_option( $field['id'] );
                continue;
            }

            // Get the option name.
            $option_value = null;

            // Determines if the option value is an array.
            $is_array_option = false !== strpos( $field['id'], '[' );

            switch ( $type ) {

                case 'checkbox':
                    if ( $is_array_option ) {
                        $option_value = self::get_array_field_posted_value( $field['id'] ) ? 'yes' : 'no';
                    } elseif ( isset( $_POST[ $field['id'] ] ) ) {
                        $option_value = 'yes';
                    } else {
                        $option_value = 'no';
                    }
                    break;

                case 'textarea':
                case 'wpeditor':
                    if ( isset( $_POST[ $field['id'] ] ) ) {
                        $option_value = wp_kses_post( trim( llms_filter_input( INPUT_POST, $field['id'], FILTER_DEFAULT ) ) );
                    } else {
                        $option_value = '';
                    }
                    break;

                case 'password':
                case 'text':
                case 'email':
                case 'number':
                case 'select':
                case 'single_select_page':
                case 'single_select_membership':
                case 'radio':
                case 'hidden':
                case 'image':
                    if ( $is_array_option ) {
                        $option_value = self::get_array_field_posted_value( $field['id'] );
                    } elseif ( isset( $_POST[ $field['id'] ] ) ) {
                        $option_value = llms_filter_input_sanitize_string( INPUT_POST, $field['id'] );
                    } else {
                        $option_value = '';
                    }

                    if ( isset( $field['sanitize'] ) && 'slug' === $field['sanitize'] ) {
                        $option_value = sanitize_title( $option_value );
                    }

                    break;

                case 'multiselect':
                    if ( isset( $_POST[ $field['id'] ] ) ) {
                        $option_value = llms_filter_input_sanitize_string( INPUT_POST, $field['id'], array( FILTER_REQUIRE_ARRAY ) );
                    } else {
                        $option_value = '';
                    }
                    break;

                default:
                    /**
                     * Action run for external field types.
                     *
                     * @since Unknown
                     * @deprecated 7.0.0 Use `llms_update_option_{$type}` filter hook instead.
                     *
                     * @param type $arg Description.
                     */
                    do_action_deprecated( "lifterlms_update_option_{$type}", array( $field ), '7.0.0' );

            }

            // Special treatment for the 'maxlength' attribute.
            if ( in_array( $type, array( 'text', 'textarea' ), true ) && isset( $field['custom_attributes']['maxlength'] ) ) {
                $option_value = llms_trim_string( $option_value, (int) $field['custom_attributes']['maxlength'], '' );
            }

            /**
             * Filters the value of a settings field after it has been parsed and sanitized
             * and before it is saved to the database.
             *
             * The dynamic portion of this hook, `{$type}` refers to the setting field type:
             * email, text, checkbox, etc...
             *
             * @since 7.0.0
             *
             * @param string|null $option_value The sanitized option value or `null`.
             * @param array       $field        The settings field array.
             */
            $option_value = apply_filters( "llms_update_option_{$type}", $option_value, $field );

            if ( ! is_null( $option_value ) ) {

                if ( $is_array_option ) {

                    parse_str( $field['id'], $option_array );

                    // Option name is first key.
                    $option_name = current( array_keys( $option_array ) );

                    // Get old option value.
                    if ( ! isset( $update_options[ $option_name ] ) ) {
                        $update_options[ $option_name ] = get_option( $option_name, array() );
                    }

                    if ( ! is_array( $update_options[ $option_name ] ) ) {
                        $update_options[ $option_name ] = array();
                    }

                    // Set keys and value.
                    $key = key( $option_array[ $option_name ] );

                    $update_options[ $option_name ][ $key ] = $option_value;

                } else {
                    $update_options[ $field['id'] ] = $option_value;
                }
            }

            /**
             * Action run prior to the update of a LifterLMS setting field option.
             *
             * An update isn't guaranteed after this action if the method's logic can't
             * find a valid posted valued to persist to the database.
             *
             * @since Unknown
             *
             * @param array $field The admin setting field array to be updated.
             */
            do_action( 'lifterlms_update_option', $field );

        }

        // Now save the options.
        foreach ( $update_options as $name => $value ) {
            update_option( $name, $value );
        }

        // phpcs:enable WordPress.Security.NonceVerification.Missing

        return true;

    }

    /**
     * Retrieves the posted value for an array type setting field.
     *
     * @since 7.0.0
     *
     * @param string $id The field ID, eg: "my_setting[field_one]".
     * @return string Returns the (sanitized) posted value or an empty string if it wasn't posted.
     */
    private static function get_array_field_posted_value( $id ) {

        parse_str( $id, $parsed_id );
        $opt_id  = key( $parsed_id );
        $opt_key = key( $parsed_id[ $opt_id ] );
        $posted  = llms_filter_input_sanitize_string( INPUT_POST, $opt_id, array( FILTER_REQUIRE_ARRAY ) );

        return $posted[ $opt_key ] ?? '';

    }

}