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Source code

function do_enclose( $content, $post_ID ) {

	global $wpdb;



	//TODO: Tidy this ghetto code up and make the debug code optional

	include_once( ABSPATH . WPINC . '/class-IXR.php' );



	$log = debug_fopen( ABSPATH . 'enclosures.log', 'a' );

	$post_links = array();

	debug_fwrite( $log, 'BEGIN ' . date( 'YmdHis', time() ) . "\n" );



	$pung = get_enclosed( $post_ID );



	$ltrs = '\w';

	$gunk = '/#~:.?+=&%@!\-';

	$punc = '.:?\-';

	$any = $ltrs . $gunk . $punc;



	preg_match_all( "{\b http : [$any] +? (?= [$punc] * [^$any] | $)}x", $content, $post_links_temp );



	debug_fwrite( $log, 'Post contents:' );

	debug_fwrite( $log, $content . "\n" );



	foreach ( $pung as $link_test ) {

		if ( !in_array( $link_test, $post_links_temp[0] ) ) { // link no longer in post

			$mid = $wpdb->get_col( $wpdb->prepare("SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d AND meta_key = 'enclosure' AND meta_value LIKE (%s)", $post_ID, like_escape( $link_test ) . '%') );

			do_action( 'delete_postmeta', $mid );

			$wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->postmeta WHERE meta_id IN(%s)", implode( ',', $mid ) ) );

			do_action( 'deleted_postmeta', $mid );

		}

	}



	foreach ( (array) $post_links_temp[0] as $link_test ) {

		if ( !in_array( $link_test, $pung ) ) { // If we haven't pung it already

			$test = @parse_url( $link_test );

			if ( false === $test )

				continue;

			if ( isset( $test['query'] ) )

				$post_links[] = $link_test;

			elseif ( isset($test['path']) && ( $test['path'] != '/' ) &&  ($test['path'] != '' ) )

				$post_links[] = $link_test;

		}

	}



	foreach ( (array) $post_links as $url ) {

		if ( $url != '' && !$wpdb->get_var( $wpdb->prepare( "SELECT post_id FROM $wpdb->postmeta WHERE post_id = %d AND meta_key = 'enclosure' AND meta_value LIKE (%s)", $post_ID, like_escape( $url ) . '%' ) ) ) {



			if ( $headers = wp_get_http_headers( $url) ) {

				$len = (int) $headers['content-length'];

				$type = $headers['content-type'];

				$allowed_types = array( 'video', 'audio' );



				// Check to see if we can figure out the mime type from

				// the extension

				$url_parts = @parse_url( $url );

				if ( false !== $url_parts ) {

					$extension = pathinfo( $url_parts['path'], PATHINFO_EXTENSION );

					if ( !empty( $extension ) ) {

						foreach ( get_allowed_mime_types( ) as $exts => $mime ) {

							if ( preg_match( '!^(' . $exts . ')$!i', $extension ) ) {

								$type = $mime;

								break;

							}

						}

					}

				}



				if ( in_array( substr( $type, 0, strpos( $type, "/" ) ), $allowed_types ) ) {

					$meta_value = "$url\n$len\n$type\n";

					$wpdb->insert($wpdb->postmeta, array('post_id' => $post_ID, 'meta_key' => 'enclosure', 'meta_value' => $meta_value) );

					do_action( 'added_postmeta', $wpdb->insert_id, $post_ID, 'enclosure', $meta_value );

				}

			}

		}

	}

}