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<?php $a = 1; unset($a); var_dump(count($GLOBALS)); var_dump(array_filter($GLOBALS, function($v, $k) { return !in_array($k, ["GLOBALS", "_SERVER", "_GET", "_POST", "_COOKIE", "argv", "argc"]); }));
Output for git.master, git.master_jit, rfc.property-hooks
int(7) Fatal error: Uncaught ArgumentCountError: Too few arguments to function {closure}(), 1 passed and exactly 2 expected in /in/XH5hB:7 Stack trace: #0 [internal function]: {closure}(Array) #1 /in/XH5hB(7): array_filter(Array, Object(Closure)) #2 {main} thrown in /in/XH5hB on line 7
Process exited with code 255.

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