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
1992                if ( 'post_content' == $field )
1993                     $value = format_to_edit($value, user_can_richedit());
1994                else
1995                     $value = format_to_edit($value);
1996           } else {
1997                $value = esc_attr($value);
1998           }
1999      } else if ( 'db' == $context ) {
2000           if ( $prefixed ) {
2001                $value = apply_filters("pre_{$field}", $value);
2002                $value = apply_filters("{$field_no_prefix}_save_pre", $value);
2003           } else {
2004                $value = apply_filters("pre_post_{$field}", $value);
2005                $value = apply_filters("{$field}_pre", $value);
2006           }
2007      } else {
2008           // Use display filters by default.
2009           if ( $prefixed )
2010                $value = apply_filters($field, $value, $post_id, $context);