3v4l.org

run code in 500+ PHP versions simultaneously
<?php define('CONSTANT', true); define('CONSTANT', true); define('CONSTANT', true);
Output for 8.5.0 - 8.5.7
Warning: Constant CONSTANT already defined, this will be an error in PHP 9 in /in/vi41R on line 5 Warning: Constant CONSTANT already defined, this will be an error in PHP 9 in /in/vi41R on line 7
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22
Warning: Constant CONSTANT already defined in /in/vi41R on line 5 Warning: Constant CONSTANT already defined in /in/vi41R on line 7
preferences:
78.63 ms | 1146 KiB | 4 Q