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run code in 150+ php & hhvm versions
Bugs & Features
<?php echo current(array_keys(array("test1" => "fail1", "test2" => "fail2")));
Output for 4.3.0 - 5.0.4, 5.1.0 - 7.1.0
test1
Output for 5.0.5
Fatal error: Only variables can be passed by reference in /in/ukInO on line 3
Process exited with code 255.