3v4l.org

run code in 300+ PHP versions simultaneously
<?php session_start(); $_SESSION['ddd'] = 'fdsfsd'; session_write_close(); session_start(); $_SESSION['ddd1'] = 'fdsfsd1'; session_write_close(); session_start(); session_write_close(); echo '<pre>'; var_dump(headers_list());
Output for 5.2.3 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
<pre>array(0) { }
Output for 5.2.2
Warning: session_start(): Cannot send session cookie - headers already sent in /in/vObUC on line 2 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 2 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 8 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 8 <pre>array(1) { [0]=> string(23) "X-Powered-By: PHP/5.2.2" }
Output for 5.2.1
Warning: session_start(): Cannot send session cookie - headers already sent in /in/vObUC on line 2 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 2 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 8 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 8 <pre>array(1) { [0]=> string(23) "X-Powered-By: PHP/5.2.1" }
Output for 5.2.0
Warning: session_start(): Cannot send session cookie - headers already sent in /in/vObUC on line 2 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 2 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 8 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 8 <pre>array(1) { [0]=> string(23) "X-Powered-By: PHP/5.2.0" }
Output for 5.1.6
Warning: session_start(): Cannot send session cookie - headers already sent in /in/vObUC on line 2 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 2 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 8 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 8 <pre>array(1) { [0]=> string(23) "X-Powered-By: PHP/5.1.6" }
Output for 5.1.5
Warning: session_start(): Cannot send session cookie - headers already sent in /in/vObUC on line 2 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 2 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 8 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 8 <pre>array(1) { [0]=> string(23) "X-Powered-By: PHP/5.1.5" }
Output for 5.1.4
Warning: session_start(): Cannot send session cookie - headers already sent in /in/vObUC on line 2 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 2 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 8 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 8 <pre>array(1) { [0]=> string(23) "X-Powered-By: PHP/5.1.4" }
Output for 5.1.3
Warning: session_start(): Cannot send session cookie - headers already sent in /in/vObUC on line 2 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 2 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 8 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 8 <pre>array(1) { [0]=> string(23) "X-Powered-By: PHP/5.1.3" }
Output for 5.1.2
Warning: session_start(): Cannot send session cookie - headers already sent in /in/vObUC on line 2 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 2 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 8 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 8 <pre>array(1) { [0]=> string(23) "X-Powered-By: PHP/5.1.2" }
Output for 5.1.1
Warning: session_start(): Cannot send session cookie - headers already sent in /in/vObUC on line 2 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 2 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 8 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 8 <pre>array(1) { [0]=> string(23) "X-Powered-By: PHP/5.1.1" }
Output for 5.1.0
Warning: session_start(): Cannot send session cookie - headers already sent in /in/vObUC on line 2 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 2 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 8 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 8 <pre>array(1) { [0]=> string(23) "X-Powered-By: PHP/5.1.0" }
Output for 5.0.5
Warning: session_start(): Cannot send session cookie - headers already sent in /in/vObUC on line 2 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 2 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 8 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 8 <pre>array(1) { [0]=> string(23) "X-Powered-By: PHP/5.0.5" }
Output for 5.0.4
Warning: session_start(): Cannot send session cookie - headers already sent in /in/vObUC on line 2 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 2 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 8 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 8 <pre>array(1) { [0]=> string(23) "X-Powered-By: PHP/5.0.4" }
Output for 5.0.3
Warning: session_start(): Cannot send session cookie - headers already sent in /in/vObUC on line 2 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 2 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 8 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 8 <pre>array(1) { [0]=> string(23) "X-Powered-By: PHP/5.0.3" }
Output for 5.0.2
Warning: session_start(): Cannot send session cookie - headers already sent in /in/vObUC on line 2 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 2 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 8 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 8 <pre>array(1) { [0]=> string(23) "X-Powered-By: PHP/5.0.2" }
Output for 5.0.1
Warning: session_start(): Cannot send session cookie - headers already sent in /in/vObUC on line 2 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 2 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 8 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 8 <pre>array(1) { [0]=> string(23) "X-Powered-By: PHP/5.0.1" }
Output for 5.0.0
Warning: session_start(): Cannot send session cookie - headers already sent in /in/vObUC on line 2 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 2 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 8 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 8 <pre>array(1) { [0]=> string(23) "X-Powered-By: PHP/5.0.0" }
Output for 4.4.5 - 4.4.9
Warning: session_start(): Cannot send session cookie - headers already sent in /in/vObUC on line 2 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 2 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 8 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 8 <pre> Fatal error: Call to undefined function: headers_list() in /in/vObUC on line 13
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.4
Warning: session_start(): Cannot send session cookie - headers already sent in /in/vObUC on line 2 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 2 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 8 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 8 <pre> Fatal error: Call to undefined function: headers_list() in /in/vObUC on line 13
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Warning: session_start() [http://www.php.net/function.session-start]: Cannot send session cookie - headers already sent in /in/vObUC on line 2 Warning: session_start() [http://www.php.net/function.session-start]: Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 2 Warning: session_start() [http://www.php.net/function.session-start]: Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start() [http://www.php.net/function.session-start]: Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 5 Warning: session_start() [http://www.php.net/function.session-start]: Cannot send session cookie - headers already sent by (output started at /in/vObUC:2) in /in/vObUC on line 8 Warning: session_start() [http://www.php.net/function.session-start]: Cannot send session cache limiter - headers already sent (output started at /in/vObUC:2) in /in/vObUC on line 8 <pre> Fatal error: Call to undefined function: headers_list() in /in/vObUC on line 13

preferences:
312.9 ms | 404 KiB | 423 Q