3v4l.org

run code in 300+ PHP versions simultaneously
<?php $vars = array('a1', '1a', 'ačervený'); foreach($vars as $var) { $$var = 'x'; } ${'a1'} = 'y'; ${'1a'} = 'y'; ${'ačervený'} = 'y'; $a = 1; $A = 2; var_dump($a, $A); $ačervený = 'a'; $aČervený = 'b'; var_dump($ačervený, $aČervený);
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, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.16 - 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
int(1) int(2) string(1) "a" string(1) "b"
preferences:
230.31 ms | 406 KiB | 311 Q