Ticket #35491: 35491.2.patch

src/wp-includes/cron.php

@@ -232 +232 @@
 }
 
 /**
+ * Check whether an action hook is scheduled to fire.
+ *
+ * Unlike {@see wp_next_scheduled()}, this checks only whether a hook is
+ * scheduled with cron, not whether it will pass given arguments or when.
+ *
+ * @since x.y.z
+ *
+ * @param string $hook Hook to look for.
+ * @return bool Whether the hook is scheduled.
+ */
+function wp_is_scheduled_hook( $hook ) {
+        $crons = _get_cron_array();
+
+        if ( empty( $crons ) ) {
+                return false;
+        }
+
+        foreach ( $crons as $cron ) {
+                if ( isset( $cron[ $hook ] ) ) {
+                        return true;
+                }
+        }
+
+        return false;
+}
+
+/**
  * Sends a request to run cron through HTTP request that doesn't halt page loading.
  *
  * @since 2.1.0

tests/phpunit/tests/cron.php

@@ -85 +85 @@
 
         }
 
+        function test_is_scheduled_hook() {
+                $hook = rand_str();
+                $ts1 = strtotime( '+30 minutes' );
+                $ts2 = strtotime( '+2 hours' );
+
+                $this->assertFalse( wp_is_scheduled_hook( $hook ) );
+
+                wp_schedule_event( $ts1, 'hourly', $hook, array( 'foo' ) );
+                wp_schedule_event( $ts2, 'daily', $hook, 'bar' );
+                wp_schedule_event( $ts2, 'twicedaily', $hook, array( 'baz' ) );
+
+                $this->assertTrue( wp_is_scheduled_hook( $hook ) );
+
+                wp_unschedule_event( $ts1, $hook, array( 'foo' ) );
+                $this->assertTrue( wp_is_scheduled_hook( $hook ) );
+
+                wp_unschedule_event( $ts2, $hook, 'bar' );
+                $this->assertTrue( wp_is_scheduled_hook( $hook ) );
+
+                wp_unschedule_event( $ts2, $hook, array( 'baz' ) );
+                $this->assertFalse( wp_is_scheduled_hook( $hook ) );
+        }
+
         function test_unschedule_event() {
                 // schedule an event and make sure it's returned by wp_next_scheduled
                 $hook = rand_str();