Source View: pre_{$field}

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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
386           $value = apply_filters( "edit_{$field}", $value, $bookmark_id );
387
388           if ( 'link_notes' == $field ) {
389                $value = esc_html( $value ); // textarea_escaped
390           } else {
391                $value = esc_attr($value);
392           }
393      } elseif ( 'db' == $context ) {
394           /** This filter is documented in wp-includes/post.php */
395           $value = apply_filters( "pre_{$field}", $value );
396      } else {
397           /** This filter is documented in wp-includes/post.php */
398           $value = apply_filters( "{$field}", $value, $bookmark_id, $context );
399
400           if ( 'attribute' == $context ) {
401                $value = esc_attr( $value );
402           } elseif ( 'js' == $context ) {
403                $value = esc_js( $value );
404           }