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
2024                if ( 'post_content' == $field )
2025                     $value = format_to_edit($value, user_can_richedit());
2026                else
2027                     $value = format_to_edit($value);
2028           } else {
2029                $value = esc_attr($value);
2030           }
2031      } else if ( 'db' == $context ) {
2032           if ( $prefixed ) {
2033                $value = apply_filters("pre_{$field}", $value);
2034                $value = apply_filters("{$field_no_prefix}_save_pre", $value);
2035           } else {
2036                $value = apply_filters("pre_post_{$field}", $value);
2037                $value = apply_filters("{$field}_pre", $value);
2038           }
2039      } else {
2040           // Use display filters by default.
2041           if ( $prefixed )
2042                $value = apply_filters($field, $value, $post_id, $context);