yfix/yf

<?php

/**
 * Simple replacement for http://placehold.it/.
 * @param mixed $w
 * @param mixed $h
 * @param mixed $params
 */
function yf_placeholder_img($w = 100, $h = 100, $params = [])
{
    $w = abs((int) $w ?: 100);
    $h = abs((int) $h ?: 100);
    $text = $params['text'] ?: $w . ' x ' . $h;

    $font_try_paths = $params['font_paths'] ?: [
        '/usr/share/fonts/',
        '/usr/share/fonts/dejavu/',
        '/usr/share/fonts/truetype/',
        '/usr/share/fonts/truetype/dejavu/',
        '/usr/share/fonts/truetype/ttf-dejavu/', // Centos
    ];
    $font_name = $params['font_name'] ?: 'DejaVuSans-Bold.ttf';
    $font = '';
    foreach ($font_try_paths as $path) {
        if (file_exists($path . $font_name)) {
            $font = $path . $font_name;
            break;
        }
    }
    $im = imagecreatetruecolor($w, $h);
    imagealphablending($im, false);

    $ctext = $params['color_text'] ?: '777';
    $cbg = $params['color_bg'] ?: 'bbb';

    // http://php.net/manual/en/function.imagecolorallocatealpha.php
    // alpha A value between 0 and 127. 0 indicates completely opaque while 127 indicates completely transparent.
    $opacity_text = $params['opacity_text'] ?: 0;
    $opacity_bg = $params['opacity_bg'] ?: 0;
    if ($params['transparent_bg']) {
        $opacity_bg = 127;
    }

    strlen($ctext) === 3 && $ctext = str_repeat(substr($ctext, 0, 1), 2) . str_repeat(substr($ctext, 1, 1), 2) . str_repeat(substr($ctext, 2, 1), 2);
    strlen($cbg) === 3 && $cbg = str_repeat(substr($cbg, 0, 1), 2) . str_repeat(substr($cbg, 1, 1), 2) . str_repeat(substr($cbg, 2, 1), 2);
    $color_text = imagecolorallocatealpha($im, hexdec(substr($ctext, 0, 2)), hexdec(substr($ctext, 2, 2)), hexdec(substr($ctext, 4, 2)), $opacity_text);
    $color_bg = imagecolorallocatealpha($im, hexdec(substr($cbg, 0, 2)), hexdec(substr($cbg, 2, 2)), hexdec(substr($cbg, 4, 2)), $opacity_bg);

    $min_size = $params['min_size'] ?: 5;
    $max_size = $params['max_size'] ?: 14;
    $def_size = ceil($w / 10) + 1;
    if ($def_size < $min_size) {
        $def_size = $min_size;
    }
    if ($def_size > $max_size) {
        $def_size = $max_size;
    }
    $font_size = $params['font_size'] ?: $def_size;
    $font_angle = $params['font_angle'] ?: 0;

    // Set the background
    imagefilledrectangle($im, 0, 0, $w, $h, $color_bg);
    imagealphablending($im, true);

    $bbox = imagettfbbox($font_size, $font_angle, $font, $text);
    $x = $bbox[0] + (imagesx($im) / 2) - ($bbox[4] / 2);
    $y = $bbox[1] + (imagesy($im) / 2) - ($bbox[5] / 2);
    imagettftext($im, $font_size, $font_angle, $x, $y, $color_text, $font, $text);

    imagesavealpha($im, true);

    ob_start();
    imagepng($im);
    imagedestroy($im);
    $data = ob_get_clean();

    if ( ! $params['no_out']) {
        header('Content-Type: image/png', true);
        header('Last-Modified: ' . gmdate('D, d M Y 00:01:01') . ' GMT', true);
        header('Content-Length: ' . strlen($data), true);
        header('X-Robots-Tag: noindex,nofollow,noarchive,nosnippet', true);
        header_remove('Pragma');
        header_remove('Cache-Control');
        header_remove('Expires');
        header_remove('Set-Cookie');
        echo $data;
    }
    return $data;
}