WP_Site_Health::get_test_loopback_requests() – Test if loopbacks work as expected.

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Tests if loopbacks work as expected.

A loopback is when WordPress queries itself, for example to start a new WP_Cron instance, or when editing a plugin or theme. This has shown itself to be a recurring issue, as code can very easily break this interaction.


$array = WP_Site_Health::get_test_loopback_requests();



array The test results.


File name: wordpress/wp-admin/includes/class-wp-site-health.php

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  public function get_test_loopback_requests() {
    $result = array(
      'label'       => __( 'Your site can perform loopback requests' ),
      'status'      => 'good',
      'badge'       => array(
        'label' => __( 'Performance' ),
        'color' => 'blue',
      'description' => sprintf(
        __( 'Loopback requests are used to run scheduled events, and are also used by the built-in editors for themes and plugins to verify code stability.' )
      'actions'     => '',
      'test'        => 'loopback_requests',

    $check_loopback = $this->WP_Site_Health::can_perform_loopback();

    $result['status'] = $check_loopback->status;

    if ( 'good' !== $result['status'] ) {
      $result['label'] = __( 'Your site could not complete a loopback request' );

      $result['description'] .= sprintf(

    return $result;

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