3v4l.org

run code in 300+ PHP versions simultaneously
<?php list($action,$what) = array("Raining ","Cats 'n Dogs"); echo $action . $what,"\n"; echo $action, $what,"\n"; echo "$action$what\n"; echo "{$action}{$what}\n"; echo "${'action'}${'what'}\n"; echo "${action}${what}\n";
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: Using ${expr} (variable variables) in strings is deprecated, use {${expr}} instead in /in/Y3pXM on line 10 Deprecated: Using ${expr} (variable variables) in strings is deprecated, use {${expr}} instead in /in/Y3pXM on line 10 Deprecated: Using ${var} in strings is deprecated, use {$var} instead in /in/Y3pXM on line 11 Deprecated: Using ${var} in strings is deprecated, use {$var} instead in /in/Y3pXM on line 11 Raining Cats 'n Dogs Raining Cats 'n Dogs Raining Cats 'n Dogs Raining Cats 'n Dogs Raining Cats 'n Dogs Raining Cats 'n Dogs
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 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 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
Raining Cats 'n Dogs Raining Cats 'n Dogs Raining Cats 'n Dogs Raining Cats 'n Dogs Raining Cats 'n Dogs Raining Cats 'n Dogs
preferences:
353.65 ms | 405 KiB | 422 Q