3v4l.org

run code in 300+ PHP versions simultaneously
<?php session_start(); if($_SESSION["PagesVisited"] != 1){ header( 'Location: /mobileSurvey1.php' ) ; }else{ $_SESSION["PagesVisited"] = 2; } ?>
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Warning: Undefined array key "PagesVisited" in /in/g8I2p on line 5 Warning: Cannot modify header information - headers already sent by (output started at /in/g8I2p:5) in /in/g8I2p on line 6
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Warning: Undefined array key "PagesVisited" in /in/g8I2p on line 5 Warning: Cannot modify header information - headers already sent by (output started at /in/g8I2p:5) in /in/g8I2p on line 6
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
Notice: Undefined index: PagesVisited in /in/g8I2p on line 5 Warning: Cannot modify header information - headers already sent by (output started at /in/g8I2p:5) in /in/g8I2p on line 6
Output for 7.3.32 - 7.3.33, 7.4.26

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