3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo php_sapi_name (), PHP_EOL; session_start(); setcookie("TestCookie", 'value'); header('X-TestHeader: value');
based on BaObu
Output for 8.0.0 - 8.0.3
cli Warning: session_start(): Session cannot be started after headers have already been sent in /in/CYsUm on line 3 Warning: Cannot modify header information - headers already sent by (output started at /in/CYsUm:2) in /in/CYsUm on line 4 Warning: Cannot modify header information - headers already sent by (output started at /in/CYsUm:2) in /in/CYsUm on line 5
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.27, 7.4.0 - 7.4.15
cli Warning: session_start(): Cannot start session when headers already sent in /in/CYsUm on line 3 Warning: Cannot modify header information - headers already sent by (output started at /in/CYsUm:2) in /in/CYsUm on line 4 Warning: Cannot modify header information - headers already sent by (output started at /in/CYsUm:2) in /in/CYsUm on line 5
Output for 5.2.3 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25
cli Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/CYsUm:2) in /in/CYsUm on line 3 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/CYsUm:2) in /in/CYsUm on line 3 Warning: Cannot modify header information - headers already sent by (output started at /in/CYsUm:2) in /in/CYsUm on line 4 Warning: Cannot modify header information - headers already sent by (output started at /in/CYsUm:2) in /in/CYsUm on line 5
Output for 4.3.10 - 4.3.11, 4.4.0 - 4.4.9, 5.0.2 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.2
cgi Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/CYsUm:2) in /in/CYsUm on line 3 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/CYsUm:2) in /in/CYsUm on line 3
Output for 4.3.2 - 4.3.9, 5.0.0 - 5.0.1
cgi Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/CYsUm on line 2 PHP_EOL Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/CYsUm:2) in /in/CYsUm on line 3 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/CYsUm:2) in /in/CYsUm on line 3
Output for 4.3.0 - 4.3.1
cgi Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/CYsUm on line 2 PHP_EOL Warning: session_start() [http://www.php.net/function.session-start]: Cannot send session cookie - headers already sent by (output started at /in/CYsUm:2) in /in/CYsUm on line 3 Warning: session_start() [http://www.php.net/function.session-start]: Cannot send session cache limiter - headers already sent (output started at /in/CYsUm:2) in /in/CYsUm on line 3