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1.1     ! misho       1: --TEST--
        !             2: Test array_diff_assoc() function : usage variations - array containing duplicate keys and values
        !             3: --FILE--
        !             4: <?php
        !             5: /* Prototype  : array array_diff_assoc(array $arr1, array $arr2 [, array ...])
        !             6:  * Description: Returns the entries of $arr1 that have values which are not 
        !             7:  * present in any of the others arguments but do additional checks whether 
        !             8:  * the keys are equal 
        !             9:  * Source code: ext/standard/array.c
        !            10:  */
        !            11: 
        !            12: /*
        !            13:  * Test how array_diff_assoc() behaves when comparing:
        !            14:  * 1. the order of the array
        !            15:  * 2. duplicate values
        !            16:  * 3. duplicate key names
        !            17:  */
        !            18: 
        !            19: echo "*** Testing array_diff_assoc() : variation ***\n";
        !            20: 
        !            21: $array_index = array('a', 'b', 'c', 0 => 'd', 'b');   //duplicate key (0), duplicate value (b)
        !            22: $array_assoc = array ('2' => 'c',   //same key=>value pair, different order
        !            23:                       '1' => 'b',
        !            24:                       '0' => 'a', 
        !            25:                       'b' => '3',   //key and value from array_index swapped 
        !            26:                       'c' => 2);    //same as above, using integer
        !            27: 
        !            28: var_dump(array_diff_assoc($array_index, $array_assoc));
        !            29: var_dump(array_diff_assoc($array_assoc, $array_index));
        !            30: 
        !            31: echo "Done";
        !            32: ?>
        !            33: --EXPECTF--
        !            34: *** Testing array_diff_assoc() : variation ***
        !            35: array(2) {
        !            36:   [0]=>
        !            37:   string(1) "d"
        !            38:   [3]=>
        !            39:   string(1) "b"
        !            40: }
        !            41: array(3) {
        !            42:   [0]=>
        !            43:   string(1) "a"
        !            44:   ["b"]=>
        !            45:   string(1) "3"
        !            46:   ["c"]=>
        !            47:   int(2)
        !            48: }
        !            49: Done