(field)_pre │ filter-hook │ WP 2.3.0

Filters the value of a specific post field before saving.

The dynamic portion of the hook name, $field, refers to the post field name.

Usage

add_filter( '(field)_pre', 'wp_kama_field_pre_filter' );

/**
 * Function for `(field)_pre` filter-hook.
 * 
 * @param mixed $value Value of the post field.
 *
 * @return mixed
 */
function wp_kama_field_pre_filter( $value ){

	// filter...
	return $value;
}

$value(mixed)

Value of the post field.

Changelog

Where the hook is called

$value = apply_filters( "{$field}_pre", $value );

Where the hook is used in WordPress