wp-includes/functions.php:5973Marks a function argument as deprecated and inform when it has been used.
$function_namestring$versionstring$messagestringoptional''2 hooks fire while _deprecated_argument() runs, in this order:
Fires when a deprecated argument is called.
Filters whether to trigger an error for deprecated arguments.
function _deprecated_argument( $function_name, $version, $message = '' ) { /** * Fires when a deprecated argument is called. * * @since 3.0.0 * * @param string $function_name The function that was called. * @param string $message A message regarding the change. * @param string $version The version of WordPress that deprecated the argument used. */ do_action( 'deprecated_argument_run', $function_name, $message, $version ); /** * Filters whether to trigger an error for deprecated arguments. * * @since 3.0.0 * * @param bool $trigger Whether to trigger the error for deprecated arguments. Default true. */ if ( WP_DEBUG && apply_filters( 'deprecated_argument_trigger_error', true ) ) { if ( function_exists( '__' ) ) { if ( $message ) { $message = sprintf( /* translators: 1: PHP function name, 2: Version number, 3: Optional message regarding the change. */ __( 'Function %1$s was called with an argument that is <strong>deprecated</strong> since version %2$s! %3$s' ), $function_name, $version, $message ); } else { $message = sprintf( /* translators: 1: PHP function name, 2: Version number. */ __( 'Function %1$s was called with an argument that is <strong>deprecated</strong> since version %2$s with no alternative available.' ), $function_name, $version ); } } else { if ( $message ) { $message = sprintf( 'Function %1$s was called with an argument that is <strong>deprecated</strong> since version %2$s! %3$s', $function_name, $version, $message ); } else { $message = sprintf( 'Function %1$s was called with an argument that is <strong>deprecated</strong> since version %2$s with no alternative available.', $function_name, $version ); } } wp_trigger_error( '', $message, E_USER_DEPRECATED ); }}Introduced in 3.0.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/functions.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.