Helper for Wordpress

GalleryInfo.php

<?php

class GalleryInfo {

	private $gallery             = null;
	private $ids                 = array();
	private $gallerySize         = 'thumbnail';
	private $imagesMetadata      = array();

	private function setIds() {
		$this->ids = array_map('intval', explode(",", $this->gallery['ids']));
	}

	public function setGallerySize() {
		
		$this->gallerySize = $this->gallery['size'];
	}

	private function setImagesMetadata() {
		$this->imagesMetadata = array();
		foreach ($this->ids as $key => $id) {
			$imagesrc = wp_get_attachment_image_src($id, $this->gallerySize);
			$image    = get_post($id);
			$this->imagesMetadata[$id] = array(
				'id'          => $id,
				'src'         => $imagesrc[0], //thumbnail size (or that one that is stated trough gallery shortcut)
				'width'       => $imagesrc[1],
				'height'      => $imagesrc[2],
				'caption'	  => sanitize_text_field($image->post_excerpt),
				'description' => wp_kses($image->post_content, array(
					'a'  => array(),
					'br' => array(),
					'em' => array(),
					'strong' => array(),
					'i'  => array()
				)),
				'title'       => sanitize_text_field($image->post_title),
				'osrc'        => $image->guid, //original image src
				'href'        => get_permalink($image->ID), //original attachment page
			);
		}
	}

	public function getGallery() {
		return $this->gallery;
	}

	public function getGallerySize() {
		
		return $this->gallerySize;
	}

	public function getIds() {
		return $this->ids;
	}

	public function getImagesMetadata() {
		return $this->imagesMetadata;
	}

	//gallery has to exist in post
	public function __construct($post) {
		if(! has_shortcode($post->post_content, 'gallery')) {
			return;
		}
		$this->gallery = get_post_gallery( $post, false );
		$this->setIds($this->gallery);
		$this->setGallerySize();
		$this->setImagesMetadata();
	}
}