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