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1.1     ! misho       1: --TEST--
        !             2: Test array_walk_recursive() function : usage variations - 'input' array with subarray
        !             3: --FILE--
        !             4: <?php
        !             5: /* Prototype  : bool array_walk_recursive(array $input, string $funcname [, mixed $userdata])
        !             6:  * Description: Apply a user function to every member of an array 
        !             7:  * Source code: ext/standard/array.c
        !             8: */
        !             9: 
        !            10: /*
        !            11:  * Testing array_walk_recursive() with an array having subarrays as elements 
        !            12: */
        !            13: 
        !            14: echo "*** Testing array_walk_recursive() : array with subarray ***\n";
        !            15: 
        !            16: // callback function
        !            17: /* Prototype : callback(mixed $value, mixed $key)
        !            18:  * Parameters : $value - values in given 'input' array
        !            19:  *              $key - keys in given 'input' array
        !            20:  * Description : It prints the count of an array elements, passed as argument
        !            21:  */
        !            22: function callback($value, $key)
        !            23: {
        !            24:    // dump the arguments to check that they are passed
        !            25:    // with proper type
        !            26:    var_dump($key);  // key
        !            27:    var_dump($value); // value
        !            28:    echo "\n"; // new line to separate the output between each element
        !            29: }
        !            30: 
        !            31: $input = array(
        !            32:   array(),
        !            33:   array(1),
        !            34:   array(1,2,3),
        !            35:   array("Mango", "Orange"),
        !            36:   array(array(1, 2, 3), array(1))
        !            37: );
        !            38: 
        !            39: var_dump( array_walk_recursive( $input, "callback"));
        !            40: 
        !            41: echo "Done"
        !            42: ?>
        !            43: --EXPECTF--
        !            44: *** Testing array_walk_recursive() : array with subarray ***
        !            45: int(0)
        !            46: int(1)
        !            47: 
        !            48: int(0)
        !            49: int(1)
        !            50: 
        !            51: int(1)
        !            52: int(2)
        !            53: 
        !            54: int(2)
        !            55: int(3)
        !            56: 
        !            57: int(0)
        !            58: string(5) "Mango"
        !            59: 
        !            60: int(1)
        !            61: string(6) "Orange"
        !            62: 
        !            63: int(0)
        !            64: int(1)
        !            65: 
        !            66: int(1)
        !            67: int(2)
        !            68: 
        !            69: int(2)
        !            70: int(3)
        !            71: 
        !            72: int(0)
        !            73: int(1)
        !            74: 
        !            75: bool(true)
        !            76: Done