3v4l.org

run code in 300+ PHP versions simultaneously
<?php session_set_save_handler(function() { echo 1; return true; }, function() { echo 2; return true; }, function() { echo 3;return true; }, function() { echo 4;return true; }, function() { echo 5;return true; }, function() { echo 6;return true; }); //"oeffne", "schliesse", "lese", "schreibe", "loesche", "gc"); session_start();
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
1 Warning: session_start(): Session cookie cannot be sent after headers have already been sent (output started at /in/JIdWV:3) in /in/JIdWV on line 5 32 Warning: session_start(): Failed to read session data: user (path: ) in /in/JIdWV on line 5
Output for 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
1 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/JIdWV:3) in /in/JIdWV on line 5 32 Warning: session_start(): Failed to read session data: user (path: ) in /in/JIdWV on line 5
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20
1 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/JIdWV:3) in /in/JIdWV on line 5 3 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/JIdWV:3) in /in/JIdWV on line 5 42
preferences:
168.68 ms | 402 KiB | 197 Q