1--TEST-- 2Test array_search()/in_array() 3--FILE-- 4<?php 5 6$arr1 = array('a','b','c'); 7$arr2 = array(); 8$arr3 = array('c','key'=>'d'); 9$arr4 = array("a\0b"=>'e','key'=>'d', 'f'); 10 11var_dump(in_array(123, $arr2)); 12var_dump(in_array(123, $arr1)); 13var_dump(array_search(123, $arr1)); 14var_dump(in_array('a', $arr1)); 15var_dump(array_search('a', $arr1)); 16var_dump(array_search('e', $arr4)); 17var_dump(array_search('d', $arr4)); 18 19echo "Done\n"; 20?> 21--EXPECT-- 22bool(false) 23bool(false) 24bool(false) 25bool(true) 26int(0) 27string(3) "ab" 28string(3) "key" 29Done 30