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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.

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
906           }
907      } else {
908           $constraint = '';
909      }
910
911      $post_title = attribute_escape($post->post_title);
912
913      $icon = "<img src='$src' title='$post_title' alt='$post_title' $constraint/>";
914
915      return apply_filters( 'attachment_icon', $icon, $post->ID );
916 }
917
918 /**
919  * Retrieve HTML content of image element.
920  *
921  * @since 2.0.0
922  * @deprecated Use {@link wp_get_attachment_image()}
923  * @see wp_get_attachment_image() Use instead.
924  *