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1.1     ! misho       1: --TEST--
        !             2: Test array_diff() function : basic functionality
        !             3: --FILE--
        !             4: <?php
        !             5: /* Prototype  : array array_diff(array $arr1, array $arr2 [, array ...])
        !             6:  * Description: Returns the entries of $arr1 that have values which are not present 
        !             7:  * in any of the others arguments. 
        !             8:  * Source code: ext/standard/array.c
        !             9:  */
        !            10: 
        !            11: /*
        !            12:  * Test basic functionality of array_diff
        !            13:  */
        !            14: 
        !            15: echo "*** Testing array_diff() : basic functionality ***\n";
        !            16: 
        !            17: //Test indexed array with integers as elements
        !            18: $array_int1 = array (1, 2, 3, 4);
        !            19: $array_int2 = array (3, 4, 5, 6);
        !            20: 
        !            21: echo "-- Test indexed array with integers as elements --\n";
        !            22: var_dump(array_diff($array_int1, $array_int2));
        !            23: var_dump(array_diff($array_int2, $array_int1));
        !            24: 
        !            25: 
        !            26: //Test indexed array with strings as elements
        !            27: $array_string1 = array ('one', 'two', 'three', 'four');
        !            28: $array_string2 = array ('three', 'four', 'five', 'six');
        !            29: 
        !            30: echo "-- Test indexed array with strings as elements --\n";
        !            31: var_dump(array_diff($array_string1, $array_string2));
        !            32: var_dump(array_diff($array_string2, $array_string1));
        !            33: 
        !            34: //Test associative array with strings as keys and integers as elements
        !            35: $array_assoc_int1 = array ('one' => 1, 'two' => 2, 'three' => 3, 'four' => 4);
        !            36: $array_assoc_int2 = array ('three' => 3, 'four' => 4, 'five' => 5, 'six' => 6);
        !            37: 
        !            38: echo "-- Test associative array with strings as keys and integers as elements --\n";
        !            39: var_dump(array_diff($array_assoc_int1, $array_assoc_int2));
        !            40: var_dump(array_diff($array_assoc_int2, $array_assoc_int1));
        !            41: 
        !            42: //Test associative array with strings as keys and elements
        !            43: $array_assoc_str1 = array ('one' => 'un', 'two' => 'deux', 'three' => 'trois', 'four' => 'quatre');
        !            44: $array_assoc_str2 = array ('three' => 'trois', 'four' => 'quatre', 'five' => 'cinq', 'six' => 'six');
        !            45: 
        !            46: echo "-- Test associative array with strings as keys and integers as elements --\n";
        !            47: var_dump(array_diff($array_assoc_str1, $array_assoc_str2));
        !            48: var_dump(array_diff($array_assoc_str2, $array_assoc_str1));
        !            49: 
        !            50: echo "-- Test array_diff with more than 2 arguments --\n";
        !            51: var_dump(array_diff($array_int1, $array_int2, $array_string1, $array_string2));
        !            52: 
        !            53: echo "Done";
        !            54: ?>
        !            55: --EXPECTF--
        !            56: *** Testing array_diff() : basic functionality ***
        !            57: -- Test indexed array with integers as elements --
        !            58: array(2) {
        !            59:   [0]=>
        !            60:   int(1)
        !            61:   [1]=>
        !            62:   int(2)
        !            63: }
        !            64: array(2) {
        !            65:   [2]=>
        !            66:   int(5)
        !            67:   [3]=>
        !            68:   int(6)
        !            69: }
        !            70: -- Test indexed array with strings as elements --
        !            71: array(2) {
        !            72:   [0]=>
        !            73:   string(3) "one"
        !            74:   [1]=>
        !            75:   string(3) "two"
        !            76: }
        !            77: array(2) {
        !            78:   [2]=>
        !            79:   string(4) "five"
        !            80:   [3]=>
        !            81:   string(3) "six"
        !            82: }
        !            83: -- Test associative array with strings as keys and integers as elements --
        !            84: array(2) {
        !            85:   ["one"]=>
        !            86:   int(1)
        !            87:   ["two"]=>
        !            88:   int(2)
        !            89: }
        !            90: array(2) {
        !            91:   ["five"]=>
        !            92:   int(5)
        !            93:   ["six"]=>
        !            94:   int(6)
        !            95: }
        !            96: -- Test associative array with strings as keys and integers as elements --
        !            97: array(2) {
        !            98:   ["one"]=>
        !            99:   string(2) "un"
        !           100:   ["two"]=>
        !           101:   string(4) "deux"
        !           102: }
        !           103: array(2) {
        !           104:   ["five"]=>
        !           105:   string(4) "cinq"
        !           106:   ["six"]=>
        !           107:   string(3) "six"
        !           108: }
        !           109: -- Test array_diff with more than 2 arguments --
        !           110: array(2) {
        !           111:   [0]=>
        !           112:   int(1)
        !           113:   [1]=>
        !           114:   int(2)
        !           115: }
        !           116: Done