Get image & other links from the given content.

extract-links-from-content.php

<?php
/**
 * Get image & other links from the given content.
 * 
 * @todo Change the `prefix_` and with your own unique prefix.
 * 
 * @since 1.0.0
 * @return array
 */
if( ! function_exists( 'prefix_get_links_from_content' ) ) :
	function prefix_get_links_from_content( $content = '', $group = false  ) {

		$links = array();

		$content = stripslashes( $content );

		// Extract all links.
		preg_match_all( '#\bhttps?://[^,\s()<>]+(?:\([\w\d]+\)|([^,[:punct:]\s]|/))#', $content, $match );

		$all_links = array_unique( $match[0] );

		// Not have any link.
		if ( empty( $all_links ) ) {
			return array();
		}

		// Get all links in group?
		if( false === $group ) {
			return $all_links;
		}

		$links = array(
			'images' => array(),
			'other' => array(),
		);

		// Extract normal and image links.
		foreach ( $all_links as $key => $link ) {
			if ( preg_match( '/^((https?:\/\/)|(www\.))([a-z0-9-].?)+(:[0-9]+)?\/[\w\-]+\.(jpg|png|gif|jpeg)\/?$/i', $link ) ) {
				$links['images'][] = $link;
			} else {

				// Collect other links.
				$links['other'][] = $link;
			}
		}

		return $links;
   	}
endif;