3v4l.org

run code in 300+ PHP versions simultaneously
<?php $defaults = array('hi'=>1, 'hi2'=>2); $args = array('hi'=>11, 'hi2'=>22, 'this'=>33); $args += $defaults; extract($args); echo $hi, $hi2, $this;
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Error: Cannot re-assign $this in /in/q9ESQ:7 Stack trace: #0 /in/q9ESQ(7): extract(Array) #1 {main} thrown in /in/q9ESQ on line 7
Process exited with code 255.
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, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20
112233

preferences:
277.35 ms | 403 KiB | 359 Q