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<?php function length(string $str): int { return 0; } $data = ['hello', 'world']; usort($data, 'length'); // works usort($data, 'strlen'); // does not work
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught ArgumentCountError: strlen() expects exactly 1 argument, 2 given in /in/SRPnb:13 Stack trace: #0 [internal function]: strlen('hello', 'world') #1 /in/SRPnb(13): usort(Array, 'strlen') #2 {main} thrown in /in/SRPnb on line 13
Process exited with code 255.

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