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多个数组求笛卡尔积

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PHP中文网Original
2016-05-24 12:52:502741browse

开发olap自定义立方体报表用到
同事之前没写出来,网上找一个
网上那个比较简洁
把自己写的分享出来,可能比较粗糙

<?php 
$a = array(&#39;A&#39;,&#39;B&#39;,&#39;C&#39;,&#39;D&#39;);
$b = array(1,2,3);
$c = array(&#39;@&#39;,&#39;#&#39;);
print_r(combineDika($a,$b,$c));
/**
 * 所有数组的笛卡尔积
 * 
 * @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;
}

/**
 * 两个数组的笛卡尔积
 * 
 * @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;
}

                            

2. [图片] 运行结果.jpg多个数组求笛卡尔积 

   1181.jpg

                     

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