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
2221                 * Filter the value of a specific post field before saving.
2222                 *
2223                 * The dynamic portion of the hook name, `$field`, refers to the post
2224                 * field name.
2225                 *
2226                 * @since 2.3.0
2227                 *
2228                 * @param mixed $value Value of the post field.
2229                 */
2230                $value = apply_filters( "pre_{$field}", $value );
2231
2232                /**
2233                 * Filter the value of a specific field before saving.
2234                 *
2235                 * The dynamic portion of the hook name, `$field_no_prefix`, refers
2236                 * to the post field name.
2237                 *
2238                 * @since 2.3.0
2239                 *