wp-admin/includes/class-wp-site-health.php:2112Tests if HTTP requests are blocked.
array public function get_test_http_requests() { $result = array( 'label' => __( 'HTTP requests seem to be working as expected' ), 'status' => 'good', 'badge' => array( 'label' => __( 'Performance' ), 'color' => 'blue', ), 'description' => sprintf( '<p>%s</p>', __( 'It is possible for site maintainers to block all, or some, communication to other sites and services. If set up incorrectly, this may prevent plugins and themes from working as intended.' ) ), 'actions' => '', 'test' => 'http_requests', ); $blocked = false; $hosts = array(); if ( defined( 'WP_HTTP_BLOCK_EXTERNAL' ) && WP_HTTP_BLOCK_EXTERNAL ) { $blocked = true; } if ( defined( 'WP_ACCESSIBLE_HOSTS' ) ) { $hosts = explode( ',', WP_ACCESSIBLE_HOSTS ); } if ( $blocked && 0 === count( $hosts ) ) { $result['status'] = 'critical'; $result['label'] = __( 'HTTP requests are blocked' ); $result['description'] .= sprintf( '<p>%s</p>', sprintf( /* translators: %s: Name of the constant used. */ __( 'HTTP requests have been blocked by the %s constant, with no allowed hosts.' ), '<code>WP_HTTP_BLOCK_EXTERNAL</code>' ) ); } if ( $blocked && 0 < count( $hosts ) ) { $result['status'] = 'recommended'; $result['label'] = __( 'HTTP requests are partially blocked' ); $result['description'] .= sprintf( '<p>%s</p>', sprintf( /* translators: 1: Name of the constant used. 2: List of allowed hostnames. */ __( 'HTTP requests have been blocked by the %1$s constant, with some allowed hosts: %2$s.' ), '<code>WP_HTTP_BLOCK_EXTERNAL</code>', implode( ',', $hosts ) ) ); } return $result; }Introduced in 5.2.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/class-wp-site-health.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.