3v4l.org

run code in 300+ PHP versions simultaneously
<?php $user=NULL; $p=array(""); $a=array(); var_dump($user['password']==$p); var_dump(0=="");
Output for 8.3.0 - 8.3.4
Warning: Trying to access array offset on null in /in/kCXsE on line 5 bool(false) bool(false)
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17
Warning: Trying to access array offset on value of type null in /in/kCXsE on line 5 bool(false) bool(false)
Output for 7.4.0 - 7.4.33
Notice: Trying to access array offset on value of type null in /in/kCXsE on line 5 bool(false) bool(true)
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
bool(false) bool(true)

preferences:
235.75 ms | 404 KiB | 379 Q