3v4l.org

run code in 300+ PHP versions simultaneously
<?php $min=0; $max=9; for($i=1; $i<=5; $i++){$captcha_token .= rand($min,$max).' ';}
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.25, 7.3.0 - 7.3.12, 7.4.0
Notice: Undefined variable: captcha_token in /in/A2DKW on line 5
preferences:
46.07 ms | 776 KiB | 4 Q