3v4l.org

run code in 300+ PHP versions simultaneously
<?php set_error_handler(function ($code, $msg, $file, $line) { fwrite(\STDERR, "$msg in file $file on line $line\n"); }); $foo = $bar; ini_set('session.name', 'SID'); echo ini_get('session.name'), PHP_EOL;
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
SID Undefined variable $bar in file /in/3lEcj on line 6

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73.63 ms | 406 KiB | 5 Q