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run code in 150+ php & hhvm versions
Bugs & Features
<?php $values = [ 'a' => 1, 'b' => 2, 'c' => 3, ]; $mapping = [ 'x' => 'a', 'y' => 'b', 'z' => 'c', ]; $combined = array_map(function ($key) use ($values) { return $values[$key]; }, $mapping); var_dump($combined);
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.14.4, 7.0.0 - 7.1.0
array(3) { ["x"]=> int(1) ["y"]=> int(2) ["z"]=> int(3) }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/SBqsv on line 3
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/SBqsv on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/SBqsv on line 3
Process exited with code 255.