soderlind/css-flags

<?php
/**
 * Sample theme functions.php that demonstrate how to include  the CSS FLags plugin / library to theme.
 *
 * More information at https://github.com/soderlind/css-flags#theme
 */



// Best practices, load parent style from functions.php don't use @import in style.css
add_action( 'wp_enqueue_scripts', 'theme_enqueue_styles' );
function theme_enqueue_styles() {
    wp_enqueue_style( 'parent-style', get_template_directory_uri() . '/style.css' );

}

//load the CSS FLags library (You have to clone it into your theme folder first: git clone https://github.com/soderlind/css-flags.git )
require_once( dirname( __FILE__ ) . '/css-flags/css-flags.php' );


//add filter(s)
add_action( 'init', function() {
    add_filter('css_flags_countries', function() {
        return array( 'all' ); // ISO_3166-1_alpha-2 codes: http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2#Officially_assigned_code_elements
    });
    // add_filter('css_flags_countries', function() {
    //     return array('all'); // ISO_3166-1_alpha-2 codes: http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2#Officially_assigned_code_elements
    // });
    // add_filter('css_flags_regions', function() {
    //     return array('europe'); //europe, oceania, africa, asia, northamerica, southamerica, middleeast
    // });
    // add_filter('css_flags_exclude', function() {
    //     return array('gb','se');
    // });
});



if ( defined( 'ABSPATH' ) ) {
    CSSFlagShortcode::instance();
}

/**
 * [cssflag] shortcode, optional attribute is countries, a comma separated list with two letter country codes eg: [cssflag countries="no,se,dk"]
 */
class CSSFlagShortcode {

    private static $instance;


    public static function instance() {
        if ( self::$instance ) {
            return self::$instance;
        }
        self::$instance = new self();
        return self::$instance;
    }

    private function __construct() {
        add_shortcode( 'cssflag', array( $this, 'cssflag' ) );
        add_action( 'wp_enqueue_scripts', array( $this, 'append_inline_style' ) );
    }


    function append_inline_style() {
        // Works only if the 'css-flags' has already been added
        wp_add_inline_style( 'css-flags','
            .box {
                width: 15%;
                float: left;
            }
            .flagbox {
                width: 60px;
                height: 60px;
                display: inline-block;
                vertical-align: middle;
            }
            .css-flag {
                margin: auto;
                display: inline-block;
                vertical-align: middle;

                border: 1px solid #e5e5e5;
                box-shadow: inset 0px 0px 0px 2px #fff;

            }
        ');
    }

    //shortcode
    function cssflag( $atts ) {

        $atr = shortcode_atts( array(
            'countries' => 'all',
        ), $atts,'cssflag');
        $countries = $this->multiexplode( array( ',', '.', '|', ':' ),$atr['countries'] );

        if ( in_array( 'all',$countries ) ) {
            $countries = array( 'ad','ae','af','ag','ai','al','am','an','ao','ar','as','at','au','aw','ax','az','ba','basque','bb','bd','be','bf','bg','bh','bi','bj','bm','bn','bo','br','bs','bt','bv','bw','by','bz','ca','catalonia','cc','cd','cf','cg','ch','ci','ck','cl','cm','cn','co','cr','cs','cu','cv','cx','cy','cz','de','dj','dk','dm','do','dz','ec','ee','eg','eh','england','er','es','et','eu','fi','fj','fk','fm','fo','fr','ga','galicia','gb','gd','ge','gf','gg','gh','gi','gl','gm','gn','gp','gq','gr','gs','gt','gu','gw','gy','hk','hm','hn','hr','ht','hu','id','ie','il','im','in','io','iq','ir','is','it','je','jm','jo','jp','ke','kg','kh','ki','km','kn','kp','kr','kw','ky','kz','la','lb','lc','li','lk','lr','ls','lt','lu','lv','ly','ma','mc','md','me','mf','mg','mh','mk','ml','mm','mn','mo','mp','mq','mr','ms','mt','mu','mv','mw','mx','my','mz','na','nc','ne','nf','ng','ni','nl','no','np','nr','nu','nz','om','pa','pe','pf','pg','ph','pk','pl','pm','pn','pr','ps','pt','pw','py','qa','re','ro','rs','ru','rw','sa','sami','sb','sc','scotland','sd','se','sg','sh','si','sj','sk','sl','sm','sn','so','sr','st','sv','sy','sz','tc','td','tf','tg','th','tj','tk','tm','tm','tn','to','tr','tt','tv','tw','tz','ua','ug','um','us','uy','uz','va','vc','ve','vg','vi','vn','vu','wales','wf','ws','ye','yt','za','zm','zw' );
        }

        $output = '';
        if ( false !== wp_style_is( 'css-flags' ) ) {
            foreach ( $countries as $country ) {
                $output .= sprintf( '<div class="box"><div class="flagbox"><span class="css-flag %1$s %1$s-portrait"></span></div></div>', $country );
            }
        } else {
            $output = 'CSS Flags plugin/library is not added';
        }

        if ( '' != $output ) {
            return $output;
        }
    }

    //from http://php.net/explode#111307
    function multiexplode( $delimiters = array( ',' ), $string ) {
        $ready = str_replace( $delimiters, $delimiters[0], $string );
        $launch = explode( $delimiters[0], $ready );
        return  $launch;
    }
}