Code Modernization: Rename parameters that use reserved keywords in wp-includes/rest-api.php.

While using reserved PHP keywords as parameter name labels is allowed, in the context of function calls using named parameters in PHP 8.0+, this will easily lead to confusion. To avoid that, it is recommended not to use reserved keywords as function parameter names.

This commit:
* Renames the `$namespace` parameter to `$route_namespace` in `register_rest_route()`.
* Renames the `$function` parameter to `$function_name` in:
 * `rest_handle_deprecated_function()`
 * `rest_handle_deprecated_argument()`
 * `rest_handle_doing_it_wrong()`
* Renames the `$array` parameter to `$input_array` in `rest_validate_array_contains_unique_items()`.

Follow-up to [52946], [52996], [52997], [52998], [53003], [53014], [53029], [53039], [53116], [53117], [53137], [53174], [53184], [53185], [53192], [53193], [53198], [53203], [53207], [53215], [53216], [53220], [53230], [53232], [53236], [53239], [53240], [53242], [53243], [53245], [53246], [53257], [53269], [53270], [53271], [53272], [53273], [53274], [53275], [53276], [53277], [53281], [53283], [53284], [53285], [53287], [53364], [53365], [54927], [54929], [54930], [54931], [54932], [54933], [54938], [54943], [54944], [54945], [54946], [54947], [54948], [54950], [54951], [54952], [54956], [54959], [54960], [54961], [54962].

Props jrf, aristath, poena, justinahinon, SergeyBiryukov.
See #56788.

git-svn-id: https://develop.svn.wordpress.org/trunk@54964 602fd350-edb4-49c9-b593-d223f7449a82

Author: SergeyBiryukov

src/wp-includes/rest-api.php

@@ -23,16 +23,16 @@
  * @since 5.1.0 Added a `_doing_it_wrong()` notice when not called on or after the `rest_api_init` hook.
  * @since 5.5.0 Added a `_doing_it_wrong()` notice when the required `permission_callback` argument is not set.
  *
- * @param string $namespace The first URL segment after core prefix. Should be unique to your package/plugin.
- * @param string $route     The base URL for route you are adding.
- * @param array  $args      Optional. Either an array of options for the endpoint, or an array of arrays for
- *                          multiple methods. Default empty array.
- * @param bool   $override  Optional. If the route already exists, should we override it? True overrides,
- *                          false merges (with newer overriding if duplicate keys exist). Default false.
+ * @param string $route_namespace The first URL segment after core prefix. Should be unique to your package/plugin.
+ * @param string $route           The base URL for route you are adding.
+ * @param array  $args            Optional. Either an array of options for the endpoint, or an array of arrays for
+ *                                multiple methods. Default empty array.
+ * @param bool   $override        Optional. If the route already exists, should we override it? True overrides,
+ *                                false merges (with newer overriding if duplicate keys exist). Default false.
  * @return bool True on success, false on error.
  */
-function register_rest_route( $namespace, $route, $args = array(), $override = false ) {
-	if ( empty( $namespace ) ) {
+function register_rest_route( $route_namespace, $route, $args = array(), $override = false ) {
+	if ( empty( $route_namespace ) ) {
 		/*
 		 * Non-namespaced routes are not allowed, with the exception of the main
 		 * and namespace indexes. If you really need to register a
@@ -45,9 +45,9 @@ function register_rest_route( $namespace, $route, $args = array(), $override = f
 		return false;
 	}
 
-	$clean_namespace = trim( $namespace, '/' );
+	$clean_namespace = trim( $route_namespace, '/' );
 
-	if ( $clean_namespace !== $namespace ) {
+	if ( $clean_namespace !== $route_namespace ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Namespace must not start or end with a slash.' ), '5.4.2' );
 	}
 
@@ -642,20 +642,20 @@ function rest_ensure_response( $response ) {
  *
  * @since 4.4.0
  *
- * @param string $function    The function that was called.
- * @param string $replacement The function that should have been called.
- * @param string $version     Version.
+ * @param string $function_name The function that was called.
+ * @param string $replacement   The function that should have been called.
+ * @param string $version       Version.
  */
-function rest_handle_deprecated_function( $function, $replacement, $version ) {
+function rest_handle_deprecated_function( $function_name, $replacement, $version ) {
 	if ( ! WP_DEBUG || headers_sent() ) {
 		return;
 	}
 	if ( ! empty( $replacement ) ) {
 		/* translators: 1: Function name, 2: WordPress version number, 3: New function name. */
-		$string = sprintf( __( '%1$s (since %2$s; use %3$s instead)' ), $function, $version, $replacement );
+		$string = sprintf( __( '%1$s (since %2$s; use %3$s instead)' ), $function_name, $version, $replacement );
 	} else {
 		/* translators: 1: Function name, 2: WordPress version number. */
-		$string = sprintf( __( '%1$s (since %2$s; no alternative available)' ), $function, $version );
+		$string = sprintf( __( '%1$s (since %2$s; no alternative available)' ), $function_name, $version );
 	}
 
 	header( sprintf( 'X-WP-DeprecatedFunction: %s', $string ) );
@@ -666,20 +666,20 @@ function rest_handle_deprecated_function( $function, $replacement, $version ) {
  *
  * @since 4.4.0
  *
- * @param string $function    The function that was called.
- * @param string $message     A message regarding the change.
- * @param string $version     Version.
+ * @param string $function_name The function that was called.
+ * @param string $message       A message regarding the change.
+ * @param string $version       Version.
  */
-function rest_handle_deprecated_argument( $function, $message, $version ) {
+function rest_handle_deprecated_argument( $function_name, $message, $version ) {
 	if ( ! WP_DEBUG || headers_sent() ) {
 		return;
 	}
 	if ( $message ) {
 		/* translators: 1: Function name, 2: WordPress version number, 3: Error message. */
-		$string = sprintf( __( '%1$s (since %2$s; %3$s)' ), $function, $version, $message );
+		$string = sprintf( __( '%1$s (since %2$s; %3$s)' ), $function_name, $version, $message );
 	} else {
 		/* translators: 1: Function name, 2: WordPress version number. */
-		$string = sprintf( __( '%1$s (since %2$s; no alternative available)' ), $function, $version );
+		$string = sprintf( __( '%1$s (since %2$s; no alternative available)' ), $function_name, $version );
 	}
 
 	header( sprintf( 'X-WP-DeprecatedParam: %s', $string ) );
@@ -690,23 +690,23 @@ function rest_handle_deprecated_argument( $function, $message, $version ) {
  *
  * @since 5.5.0
  *
- * @param string      $function The function that was called.
- * @param string      $message  A message explaining what has been done incorrectly.
- * @param string|null $version  The version of WordPress where the message was added.
+ * @param string      $function_name The function that was called.
+ * @param string      $message       A message explaining what has been done incorrectly.
+ * @param string|null $version       The version of WordPress where the message was added.
  */
-function rest_handle_doing_it_wrong( $function, $message, $version ) {
+function rest_handle_doing_it_wrong( $function_name, $message, $version ) {
 	if ( ! WP_DEBUG || headers_sent() ) {
 		return;
 	}
 
 	if ( $version ) {
 		/* translators: Developer debugging message. 1: PHP function name, 2: WordPress version number, 3: Explanatory message. */
 		$string = __( '%1$s (since %2$s; %3$s)' );
-		$string = sprintf( $string, $function, $version, $message );
+		$string = sprintf( $string, $function_name, $version, $message );
 	} else {
 		/* translators: Developer debugging message. 1: PHP function name, 2: Explanatory message. */
 		$string = __( '%1$s (%2$s)' );
-		$string = sprintf( $string, $function, $message );
+		$string = sprintf( $string, $function_name, $message );
 	}
 
 	header( sprintf( 'X-WP-DoingItWrong: %s', $string ) );
@@ -1656,13 +1656,13 @@ function rest_handle_multi_type_schema( $value, $args, $param = '' ) {
  *
  * @since 5.5.0
  *
- * @param array $array The array to check.
+ * @param array $input_array The array to check.
  * @return bool True if the array contains unique items, false otherwise.
  */
-function rest_validate_array_contains_unique_items( $array ) {
+function rest_validate_array_contains_unique_items( $input_array ) {
 	$seen = array();
 
-	foreach ( $array as $item ) {
+	foreach ( $input_array as $item ) {
 		$stabilized = rest_stabilize_value( $item );
 		$key        = serialize( $stabilized );