attachment_url_to_postid

Filters an attachment id found by URL.

Description

apply_filters( 'attachment_url_to_postid', (int|null) $post_id, (string) $url ); 

Parameters (2)

0. $post_id (int|null)
The post_id (if any) found by the function.
1. $url (string)
The URL being looked up.

Usage

To run the hook, copy the example below.
  1. $post_id = apply_filters( 'attachment_url_to_postid', $post_id, $url ); 
  2.  
  3. if ( !empty( $post_id ) ) { 
  4.  
  5. // everything has led up to this point... 
  6.  
  7.  
The following example is for adding a hook callback.
  1. // define the attachment_url_to_postid callback 
  2. function filter_attachment_url_to_postid( $post_id, $url ) { 
  3. // make filter magic happen here... 
  4. return $post_id
  5. }; 
  6.  
  7. // add the filter 
  8. add_filter( 'attachment_url_to_postid', 'filter_attachment_url_to_postid', 10, 2 ); 
To remove a hook callback, use the example below.
  1. // remove the filter 
  2. remove_filter( 'attachment_url_to_postid', 'filter_attachment_url_to_postid', 10, 2 ); 

Defined (1)

The filter is defined in the following location(s).

/wp-includes/media.php  
  1. return (int) apply_filters( 'attachment_url_to_postid', $post_id, $url );