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
1451                if ( 'post_content' == $field )
1452                     $value = format_to_edit($value, user_can_richedit());
1453                else
1454                     $value = format_to_edit($value);
1455           } else {
1456                $value = esc_attr($value);
1457           }
1458      } else if ( 'db' == $context ) {
1459           if ( $prefixed ) {
1460                $value = apply_filters("pre_$field", $value);
1461                $value = apply_filters("${field_no_prefix}_save_pre", $value);
1462           } else {
1463                $value = apply_filters("pre_post_$field", $value);
1464                $value = apply_filters("${field}_pre", $value);
1465           }
1466      } else {
1467           // Use display filters by default.
1468           if ( $prefixed )
1469                $value = apply_filters($field, $value, $post_id, $context);