3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo $tlsversion = $_SERVER["HTTP_X_SSL_PROTOCOL"];
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.29, 8.2.0 - 8.2.20, 8.3.0 - 8.3.8
Warning: Undefined array key "HTTP_X_SSL_PROTOCOL" in /in/dqomj on line 3
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined index: HTTP_X_SSL_PROTOCOL in /in/dqomj on line 3
Output for 7.3.32 - 7.3.33

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126.01 ms | 402 KiB | 164 Q