CURLOPT_TCP_KEEPALIVE

ConstantAdded in PHP 5.5

CURLOPT_TCP_KEEPALIVE is one of the accepted parameters for curl_setopt parameter #2.

CURLOPT_TCP_KEEPALIVE — If set to 1, TCP keepalive probes will be sent. The delay and frequency of these probes can be controlled by the CURLOPT_TCP_KEEPIDLE and CURLOPT_TCP_KEEPINTVL options, provided the operating system supports them. If set to 0 (default) keepalive probes are disabled. The maximum number of probes can be set with the CURLOPT_TCP_KEEPCNT option. Available as of cURL 7.25.0.

PHP 5.3-5.4
PHP 5.5
Added
PHP 5.6
PHP 7
PHP 8.0
PHP 8.1
PHP 8.2
PHP 8.3
PHP 8.4
PHP 8.5
CURLOPT_TCP_KEEPALIVE = 213;

Changes to the CURLOPT_TCP_KEEPALIVE Constant

PHP 5.5

  • Constant added

CURLOPT_TCP_KEEPALIVE Constant Availability

PHP VersionAvailability
PHP 8.5Future Release Yes
PHP 8.4Upcoming Release Yes
PHP 8.3Supported (Latest) Yes
PHP 8.2Supported Yes
PHP 8.1Security-Fixes Only Yes
PHP 8.0Unsupported Yes
PHP 7.4Unsupported Yes
PHP 7.3Unsupported Yes
PHP 7.2Unsupported Yes
PHP 7.1Unsupported Yes
PHP 7.0Unsupported Yes
PHP 5.6Unsupported Yes
PHP 5.5Unsupported Yes
PHP 5.4Unsupported No
PHP 5.3Unsupported No