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/FClVi on line 7 Deprecated: Using ${expr} (variable variables) in strings is deprecated, use {${expr}} instead in /in/FClVi on line 7 Deprecated: Using ${var} in strings is deprecated, use {$var} instead in /in/FClVi on line 8 Deprecated: Using ${var} in strings is deprecated, use {$var} instead in /in/FClVi on line 8 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 - 5.6.40, 7.0.0 - 7.0.33, 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
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:
256.48 ms | 405 KiB | 459 Q