3v4l.org

run code in 300+ PHP versions simultaneously
<?php for ( $a=3, $b=4; $a++, $a < $b; ) { $result = $a * $b; } var_dump( $result );
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: Undefined variable $result in /in/9sS4Q on line 5 NULL
Output for 5.0.4 - 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, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined variable: result in /in/9sS4Q on line 5 NULL
Output for 7.3.32 - 7.3.33
NULL
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.3
Notice: Undefined variable: result in /in/9sS4Q on line 5 NULL
preferences:
239.93 ms | 402 KiB | 356 Q