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; echo $what; echo "\n"; echo "$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/VUHrs on line 14 Deprecated: Using ${expr} (variable variables) in strings is deprecated, use {${expr}} instead in /in/VUHrs on line 14 Deprecated: Using ${var} in strings is deprecated, use {$var} instead in /in/VUHrs on line 15 Deprecated: Using ${var} in strings is deprecated, use {$var} instead in /in/VUHrs on line 15 Raining Cats 'n Dogs 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 Raining Cats 'n Dogs
preferences:
273.13 ms | 405 KiB | 459 Q