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1.1       misho       1: --TEST--
                      2: Test usort() function : usage variations - duplicate keys and values
                      3: --FILE--
                      4: <?php
                      5: /* Prototype  : bool usort(array $array_arg, string $cmp_function)
                      6:  * Description: Sort an array by values using a user-defined comparison function 
                      7:  * Source code: ext/standard/array.c
                      8:  */
                      9: 
                     10: /*
                     11:  * Pass an array with duplicate keys and values to usort() to test behaviour
                     12:  */
                     13: 
                     14: echo "*** Testing usort() : usage variation ***\n";
                     15: 
                     16: function cmp($value1, $value2)
                     17: {
                     18:   if($value1 == $value2) {
                     19:     return 0;
                     20:   }
                     21:   else if($value1 > $value2) {
                     22:     return 1;
                     23:   }
                     24:   else
                     25:     return -1;
                     26: }
                     27: 
                     28: // Array with duplicate string and integer keys and values
                     29: $array_arg = array(0 => 2,     "a" => 8, "d" => 9, 
                     30:                    3 => 3,     5 => 2,   "o" => 6, 
                     31:                    "z" => -99, 0 => 1,   "z" => 3);
                     32: 
                     33: echo "\n-- Array with duplicate keys --\n";
                     34: var_dump( usort($array_arg, 'cmp') );
                     35: var_dump($array_arg);
                     36: 
                     37: // Array with default and assigned keys
                     38: $array_arg = array(0 => "Banana", 1 => "Mango", "Orange", 2 => "Apple", "Pineapple");
                     39: 
                     40: echo "\n-- Array with default/assigned keys --\n";
                     41: var_dump( usort($array_arg, 'cmp') );
                     42: var_dump($array_arg);
                     43: ?>
                     44: ===DONE===
                     45: --EXPECTF--
                     46: *** Testing usort() : usage variation ***
                     47: 
                     48: -- Array with duplicate keys --
                     49: bool(true)
                     50: array(7) {
                     51:   [0]=>
                     52:   int(1)
                     53:   [1]=>
                     54:   int(2)
                     55:   [2]=>
                     56:   int(3)
                     57:   [3]=>
                     58:   int(3)
                     59:   [4]=>
                     60:   int(6)
                     61:   [5]=>
                     62:   int(8)
                     63:   [6]=>
                     64:   int(9)
                     65: }
                     66: 
                     67: -- Array with default/assigned keys --
                     68: bool(true)
                     69: array(4) {
                     70:   [0]=>
                     71:   string(5) "Apple"
                     72:   [1]=>
                     73:   string(6) "Banana"
                     74:   [2]=>
                     75:   string(5) "Mango"
                     76:   [3]=>
                     77:   string(9) "Pineapple"
                     78: }
                     79: ===DONE===