PHP自訂函數產生笛卡爾積

";print_r(combineDika($color, $size, $local));/** * 所有數組的笛卡爾積 * * @param unknown_type $data */function combineDika() {$data = func_get_args();$cnt = count($data);$result = array();foreach($data[0] as $item) {$result[] = array($item);}for($i = 1; $i < $cnt; $i++) {$result = combineArray($result,$data[$i]);}return $result;} /** * 兩個數組的笛卡爾積 * * @param unknown_type $arr1 * @param unknown_type $arr2 */function combineArray($arr1,$arr2) {$result = array();foreach ($arr1 as $item1) {foreach ($arr2 as $item2) {$temp = $item1;$temp[] = $item2;$result[] = $temp;}}return $result;}?>

運行結果：

Array(    [0] => Array        (            [0] => red            [1] => 39            [2] => beijing        )    [1] => Array        (            [0] => red            [1] => 39            [2] => shanghai        )    [2] => Array        (            [0] => red            [1] => 40            [2] => beijing        )    [3] => Array        (            [0] => red            [1] => 40            [2] => shanghai        )    [4] => Array        (            [0] => red            [1] => 41            [2] => beijing        )    [5] => Array        (            [0] => red            [1] => 41            [2] => shanghai        )    [6] => Array        (            [0] => green            [1] => 39            [2] => beijing        )    [7] => Array        (            [0] => green            [1] => 39            [2] => shanghai        )    [8] => Array        (            [0] => green            [1] => 40            [2] => beijing        )    [9] => Array        (            [0] => green            [1] => 40            [2] => shanghai        )    [10] => Array        (            [0] => green            [1] => 41            [2] => beijing        )    [11] => Array        (            [0] => green            [1] => 41            [2] => shanghai        ))

以上就介紹了PHP自訂函數產生笛卡爾積，包括了方面的內容，希望對PHP教程有興趣的朋友有所協助。

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