diff -r 7b1b88e27a20 -r 48c4eec2b7e6 wp/wp-includes/plugin.php
--- a/wp/wp-includes/plugin.php	Thu Sep 29 08:06:27 2022 +0200
+++ b/wp/wp-includes/plugin.php	Fri Sep 05 18:40:08 2025 +0200
@@ -30,6 +30,9 @@
 /** @var int[] $wp_actions */
 global $wp_actions;
 
+/** @var int[] $wp_filters */
+global $wp_filters;
+
 /** @var string[] $wp_current_filter */
 global $wp_current_filter;
 
@@ -43,6 +46,10 @@
 	$wp_actions = array();
 }
 
+if ( ! isset( $wp_filters ) ) {
+	$wp_filters = array();
+}
+
 if ( ! isset( $wp_current_filter ) ) {
 	$wp_current_filter = array();
 }
@@ -155,15 +162,22 @@
  *              by adding it to the function signature.
  *
  * @global WP_Hook[] $wp_filter         Stores all of the filters and actions.
+ * @global int[]     $wp_filters        Stores the number of times each filter was triggered.
  * @global string[]  $wp_current_filter Stores the list of current filters with the current one last.
  *
  * @param string $hook_name The name of the filter hook.
  * @param mixed  $value     The value to filter.
- * @param mixed  ...$args   Additional parameters to pass to the callback functions.
+ * @param mixed  ...$args   Optional. Additional parameters to pass to the callback functions.
  * @return mixed The filtered value after all hooked functions are applied to it.
  */
 function apply_filters( $hook_name, $value, ...$args ) {
-	global $wp_filter, $wp_current_filter;
+	global $wp_filter, $wp_filters, $wp_current_filter;
+
+	if ( ! isset( $wp_filters[ $hook_name ] ) ) {
+		$wp_filters[ $hook_name ] = 1;
+	} else {
+		++$wp_filters[ $hook_name ];
+	}
 
 	// Do 'all' actions first.
 	if ( isset( $wp_filter['all'] ) ) {
@@ -204,6 +218,7 @@
  *                      functions hooked to `$hook_name` are supplied using an array.
  *
  * @global WP_Hook[] $wp_filter         Stores all of the filters and actions.
+ * @global int[]     $wp_filters        Stores the number of times each filter was triggered.
  * @global string[]  $wp_current_filter Stores the list of current filters with the current one last.
  *
  * @param string $hook_name The name of the filter hook.
@@ -211,7 +226,13 @@
  * @return mixed The filtered value after all hooked functions are applied to it.
  */
 function apply_filters_ref_array( $hook_name, $args ) {
-	global $wp_filter, $wp_current_filter;
+	global $wp_filter, $wp_filters, $wp_current_filter;
+
+	if ( ! isset( $wp_filters[ $hook_name ] ) ) {
+		$wp_filters[ $hook_name ] = 1;
+	} else {
+		++$wp_filters[ $hook_name ];
+	}
 
 	// Do 'all' actions first.
 	if ( isset( $wp_filter['all'] ) ) {
@@ -349,9 +370,9 @@
 /**
  * Returns whether or not a filter hook is currently being processed.
  *
- * The function current_filter() only returns the most recent filter or action
- * being executed. did_action() returns true once the action is initially
- * processed.
+ * The function current_filter() only returns the most recent filter being executed.
+ * did_filter() returns the number of times a filter has been applied during
+ * the current request.
  *
  * This function allows detection for any filter currently being executed
  * (regardless of whether it's the most recent filter to fire, in the case of
@@ -360,10 +381,10 @@
  * @since 3.9.0
  *
  * @see current_filter()
- * @see did_action()
+ * @see did_filter()
  * @global string[] $wp_current_filter Current filter.
  *
- * @param null|string $hook_name Optional. Filter hook to check. Defaults to null,
+ * @param string|null $hook_name Optional. Filter hook to check. Defaults to null,
  *                               which checks if any filter is currently being run.
  * @return bool Whether the filter is currently in the stack.
  */
@@ -378,6 +399,26 @@
 }
 
 /**
+ * Retrieves the number of times a filter has been applied during the current request.
+ *
+ * @since 6.1.0
+ *
+ * @global int[] $wp_filters Stores the number of times each filter was triggered.
+ *
+ * @param string $hook_name The name of the filter hook.
+ * @return int The number of times the filter hook has been applied.
+ */
+function did_filter( $hook_name ) {
+	global $wp_filters;
+
+	if ( ! isset( $wp_filters[ $hook_name ] ) ) {
+		return 0;
+	}
+
+	return $wp_filters[ $hook_name ];
+}
+
+/**
  * Adds a callback function to an action hook.
  *
  * Actions are the hooks that the WordPress core launches at specific points
@@ -424,7 +465,7 @@
  *      *
  *      * - 'example_action' is the action hook.
  *      * - $arg1 and $arg2 are the additional arguments passed to the callback.
- *     $value = do_action( 'example_action', $arg1, $arg2 );
+ *     do_action( 'example_action', $arg1, $arg2 );
  *
  * @since 1.2.0
  * @since 5.3.0 Formalized the existing and already documented `...$arg` parameter
@@ -534,7 +575,7 @@
  *
  * @since 2.5.0
  *
- * @see has_filter() has_action() is an alias of has_filter().
+ * @see has_filter() This function is an alias of has_filter().
  *
  * @param string                      $hook_name The name of the action hook.
  * @param callable|string|array|false $callback  Optional. The callback to check for.
@@ -600,8 +641,19 @@
 /**
  * Returns whether or not an action hook is currently being processed.
  *
+ * The function current_action() only returns the most recent action being executed.
+ * did_action() returns the number of times an action has been fired during
+ * the current request.
+ *
+ * This function allows detection for any action currently being executed
+ * (regardless of whether it's the most recent action to fire, in the case of
+ * hooks called from hook callbacks) to be verified.
+ *
  * @since 3.9.0
  *
+ * @see current_action()
+ * @see did_action()
+ *
  * @param string|null $hook_name Optional. Action hook to check. Defaults to null,
  *                               which checks if any action is currently being run.
  * @return bool Whether the action is currently in the stack.
@@ -655,6 +707,7 @@
  * @param string $version     The version of WordPress that deprecated the hook.
  * @param string $replacement Optional. The hook that should have been used. Default empty.
  * @param string $message     Optional. A message regarding the change. Default empty.
+ * @return mixed The filtered value after all hooked functions are applied to it.
  */
 function apply_filters_deprecated( $hook_name, $args, $version, $replacement = '', $message = '' ) {
 	if ( ! has_filter( $hook_name ) ) {
@@ -718,7 +771,7 @@
 	arsort( $wp_plugin_paths );
 
 	foreach ( $wp_plugin_paths as $dir => $realdir ) {
-		if ( strpos( $file, $realdir ) === 0 ) {
+		if ( str_starts_with( $file, $realdir ) ) {
 			$file = $dir . substr( $file, strlen( $realdir ) );
 		}
 	}
@@ -912,18 +965,7 @@
 }
 
 /**
- * Builds Unique ID for storage and retrieval.
- *
- * The old way to serialize the callback caused issues and this function is the
- * solution. It works by checking for objects and creating a new property in
- * the class to keep track of the object and new objects of the same class that
- * need to be added.
- *
- * It also allows for the removal of actions and filters for objects after they
- * change class properties. It is possible to include the property $wp_filter_id
- * in your class and set it to "null" or a number to bypass the workaround.
- * However this will prevent you from adding new classes and any new classes
- * will overwrite the previous hook by the same class.
+ * Builds a unique string ID for a hook callback function.
  *
  * Functions and static method callbacks are just returned as strings and
  * shouldn't have any speed penalty.