Source View: pre_{$field}

To save our bandwidth, we show only a snippet of code around each occurence of the hook. View complete file in SVN (without highlighting).

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
1170           }
1171
1172           if ( 'description' == $field )
1173                $value = esc_html( $value ); // textarea_escaped?
1174           else
1175                $value = esc_attr($value);
1176      } elseif ( 'db' == $context ) {
1177           if ( $prefixed ) {
1178                /** This filter is documented in wp-includes/post.php */
1179                $value = apply_filters( "pre_{$field}", $value );
1180           } else {
1181
1182                /**
1183                 * Filters the value of a user field in the 'db' context.
1184                 *
1185                 * The dynamic portion of the hook name, `$field`, refers to the prefixed user
1186                 * field being filtered, such as 'user_login', 'user_email', 'first_name', etc.
1187                  *
1188                 * @since 2.9.0