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<?php $input = [1, 2]; var_dump(array_filter($input, function(& $value) { if ($value % 2 === 0) { return false; } $value++; return true; }));
Output for git.master, git.master_jit, rfc.property-hooks
Warning: {closure}(): Argument #1 ($value) must be passed by reference, value given in /in/Z2HnL on line 4 Warning: {closure}(): Argument #1 ($value) must be passed by reference, value given in /in/Z2HnL on line 4 array(1) { [0]=> int(1) }

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