Source View: wp_get_attachment_thumb_url

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Understanding Source Code

The best way to understand what a hook does is to look at where it occurs in the source code.

  • Action hooks look like this: do_action( "hook_name" )
  • Filter hooks look like this: apply_filters( "hook_name", "what_to_filter" ).

Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.

Source View

Line Code
1468           return false;
1469      if ( !$url = wp_get_attachment_url( $post->ID ) )
1470           return false;
1471
1472      if ( !$thumb = wp_get_attachment_thumb_file( $post->ID ) )
1473           return false;
1474
1475      $url = str_replace(basename($url), basename($thumb), $url);
1476
1477      return apply_filters( 'wp_get_attachment_thumb_url', $url, $post->ID );
1478 }
1479
1480 function wp_attachment_is_image( $post_id = 0 ) {
1481      $post_id = (int) $post_id;
1482      if ( !$post =& get_post( $post_id ) )
1483           return false;
1484
1485      if ( !$file = get_attached_file( $post->ID ) )
1486           return false;