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1.1 misho 1: --TEST-- 2: callback function is a closure 3: --SKIPIF-- 4: <?php if (!extension_loaded("filter")) die("skip"); ?> 5: --FILE-- 6: <?php 7: $callback = function ($var) { 8: return $var; 9: }; 10: $var = "test"; 11: var_dump(filter_var($var, FILTER_CALLBACK, array('options'=> $callback))); 12: ?> 13: --EXPECT-- 14: string(4) "test"