View file File name : class-wpo-image-utils.php Content :<?php if (!defined('ABSPATH')) die('Access denied.'); if (!class_exists('WPO_Image_Utils')) : class WPO_Image_Utils { /** * Get image paths to resized attachment images. * * @param int $attachment_id * @return array */ public static function get_attachment_files($attachment_id) { $attachment_images = array(); $upload_dir = wp_get_upload_dir(); // get sizes info from attachment meta data. $meta = wp_get_attachment_metadata($attachment_id); if (!is_array($meta) || !array_key_exists('sizes', $meta)) return $attachment_images; $image_sizes = array_keys($meta['sizes']); // build list of resized images. foreach ($image_sizes as $size) { $image = image_get_intermediate_size($attachment_id, $size); if (is_array($image)) { $file = trailingslashit($upload_dir['basedir']) . $image['path']; if (is_file($file) && !in_array($file, $attachment_images)) { $attachment_images[$size] = $file; } } } return $attachment_images; } /** * Returns an array of allowed extensions * * @return array */ public static function get_allowed_extensions() { return array('gif', 'jpeg', 'jpg', 'png'); } /** * Returns given file extension * * @param string $file * * @return mixed */ public static function get_extension($file) { $file_type = wp_check_filetype($file); return $file_type['ext']; } /** * Tests if given extension is present in allowed extensions array * * @param string $ext Extension to check * @param array $allowed_extensions Array of allowed extensions * * @return bool */ public static function is_supported_extension($ext, $allowed_extensions) { return in_array($ext, $allowed_extensions); } } endif;