3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo( join(",", null));
Output for 5.2.5 - 7.1.0
Warning: join(): Invalid arguments passed in /in/JsZrI on line 3
Output for 4.3.2 - 5.2.4
Warning: join(): Bad arguments. in /in/JsZrI on line 3
Output for 4.3.0 - 4.3.1
Warning: join() [http://www.php.net/function.join]: Bad arguments. in /in/JsZrI on line 3