3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function displayR($a, $b) { return implode(' ', [$a, $b]); } $i = 1; $sR1S1 = 'Hello'; $nR1S1P = 'World'; echo displayR(${"sR{$i}S1"}, ${"nR{$i}S1P"});
Output for 5.4.0 - 7.2.0
Hello World
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/QfK0t on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/QfK0t on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/QfK0t on line 4
Process exited with code 255.