Multisite: Change WP_Network id property to an integer.

For consistency and developer sanity.

Props flixos90.
Fixes #37050.

Built from https://develop.svn.wordpress.org/trunk@37870


git-svn-id: http://core.svn.wordpress.org/trunk@37811 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/plugin.php

@@ -655,6 +655,60 @@ function remove_all_actions($tag, $priority = false) {
 	return remove_all_filters($tag, $priority);
 }
 
+/**
+ * Fires functions attached to a deprecated filter hook.
+ *
+ * When a filter hook is deprecated, the apply_filters() call is replaced with
+ * apply_filters_deprecated(), which triggers a deprecation notice and then fires
+ * the original filter hook.
+ *
+ * @since 4.6.0
+ *
+ * @see _deprecated_hook()
+ *
+ * @param string $tag         The name of the filter hook.
+ * @param array  $args        Array of additional function arguments to be passed to apply_filters().
+ * @param string $version     The version of WordPress that deprecated the hook.
+ * @param string $replacement Optional. The hook that should have been used.
+ * @param string $message     Optional. A message regarding the change.
+ */
+function apply_filters_deprecated( $tag, $args, $version, $replacement = false, $message = null ) {
+	if ( ! has_filter( $tag ) ) {
+		return;
+	}
+
+	_deprecated_hook( $tag, $version, $replacement, $message );
+
+	return apply_filters_ref_array( $tag, $args );
+}
+
+/**
+ * Fires functions attached to a deprecated action hook.
+ *
+ * When an action hook is deprecated, the do_action() call is replaced with
+ * do_action_deprecated(), which triggers a deprecation notice and then fires
+ * the original hook.
+ *
+ * @since 4.6.0
+ *
+ * @see _deprecated_hook()
+ *
+ * @param string $tag         The name of the action hook.
+ * @param array  $args        Array of additional function arguments to be passed to do_action().
+ * @param string $version     The version of WordPress that deprecated the hook.
+ * @param string $replacement Optional. The hook that should have been used.
+ * @param string $message     Optional. A message regarding the change.
+ */
+function do_action_deprecated( $tag, $args, $version, $replacement = false, $message = null ) {
+	if ( ! has_action( $tag ) ) {
+		return;
+	}
+
+	_deprecated_hook( $tag, $version, $replacement, $message );
+
+	do_action_ref_array( $tag, $args );
+}
+
 //
 // Functions for handling plugins.
 //