Ticket #45197: 45197.diff

src/wp-includes/capabilities.php

@@ -659 +659 @@
         return $can;
 }
 
+/**
+ * Whether a particular user has a specific capability for a given site.
+ *
+ *
+ * @param int|WP_User $user       User ID or object.
+ * @param string      $capability Capability name.
+ * @return bool Whether the user has the given capability.
+ */
+function user_can_for_blog( $user, $blog_id, $capability ) {
+        if ( ! is_object( $user ) ) {
+                $user = get_userdata( $user );
+        }
+
+        if ( ! $user || ! $user->exists() ) {
+                return false;
+        }
+
+        $switched = is_multisite() ? switch_to_blog( $blog_id ) : false;
+
+        $args = array_slice( func_get_args(), 2 );
+        $args = array_merge( array( $capability ), $args );
+
+        $can = call_user_func_array( array( $user, 'has_cap' ), $args );
+
+        if ( $switched ) {
+                restore_current_blog();
+        }
+
+        return $can;
+}
+
 /**
  * Whether the author of the supplied post has a specific capability.
  *