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<?php $langs = array('en' => 'english', 'de' => 'german'); echo key(reset($langs));
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: key(): Argument #1 ($array) must be of type array, string given in /in/kSBGO:4 Stack trace: #0 /in/kSBGO(4): key('english') #1 {main} thrown in /in/kSBGO on line 4
Process exited with code 255.

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