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1.1 misho 1: --TEST-- 2: Test array_flip() function : usage variations - 'input' argument with repeatitive keys and values 3: --FILE-- 4: <?php 5: /* Prototype : array array_flip(array $input) 6: * Description: Return array with key <-> value flipped 7: * Source code: ext/standard/array.c 8: */ 9: 10: /* 11: * Using different types of repeatitive keys as well as values for 'input' array 12: */ 13: 14: echo "*** Testing array_flip() : 'input' array with repeatitive keys/values ***\n"; 15: 16: // array with numeric key repeatition 17: $input = array(1 => 'value', 2 => 'VALUE', 1 => "VaLuE", 3.4 => 4, 3.4 => 5); 18: var_dump( array_flip($input) ); 19: 20: // array with string key repeatition 21: $input = array("key" => 1, "two" => 'TWO', 'three' => 3, 'key' => "FOUR"); 22: var_dump( array_flip($input) ); 23: 24: // array with bool key repeatition 25: $input = array(true => 1, false => 0, TRUE => -1); 26: var_dump( array_flip($input) ); 27: 28: // array with null key repeatition 29: $input = array(null => "Hello", NULL => 0); 30: var_dump( array_flip($input) ); 31: 32: // array with numeric value repeatition 33: $input = array('one' => 1, 'two' => 2, 3 => 1, "index" => 1); 34: var_dump( array_flip($input) ); 35: 36: //array with string value repeatition 37: $input = array('key1' => "value1", "key2" => '2', 'key3' => 'value1'); 38: var_dump( array_flip($input) ); 39: 40: echo "Done" 41: ?> 42: --EXPECTF-- 43: *** Testing array_flip() : 'input' array with repeatitive keys/values *** 44: array(3) { 45: ["VaLuE"]=> 46: int(1) 47: ["VALUE"]=> 48: int(2) 49: [5]=> 50: int(3) 51: } 52: array(3) { 53: ["FOUR"]=> 54: string(3) "key" 55: ["TWO"]=> 56: string(3) "two" 57: [3]=> 58: string(5) "three" 59: } 60: array(2) { 61: [-1]=> 62: int(1) 63: [0]=> 64: int(0) 65: } 66: array(1) { 67: [0]=> 68: string(0) "" 69: } 70: array(2) { 71: [1]=> 72: string(5) "index" 73: [2]=> 74: string(3) "two" 75: } 76: array(2) { 77: ["value1"]=> 78: string(4) "key3" 79: [2]=> 80: string(4) "key2" 81: } 82: Done