Fsockopen::test( $capabilities = array() ): bool

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Self-test whether the transport can be used.


The available capabilities to test for can be found in \WpOrg\Requests\Capability.


bool> $capabilities Optional. Associative array of capabilities to test against, i.e. [<capability> => true].


bool Whether the transport can be used.


public static function test($capabilities = []) {
	if (!function_exists('fsockopen')) {
		return false;

	// If needed, check that streams support SSL
	if (isset($capabilities[Capability::SSL]) && $capabilities[Capability::SSL]) {
		if (!extension_loaded('openssl') || !function_exists('openssl_x509_parse')) {
			return false;

	return true;

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