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run code in 150+ php & hhvm versions
Bugs & Features
<?php function test($str, $func) { $ret = $func($str); return $ret; } echo test('foo', 'strtoupper');
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
FOO