怎么由一维数组生成多维数组-PHP Tutorial-php.cn

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怎么由一维数组生成多维数组

Jun 06, 2016 pm 08:06 PM

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一直不太明白，怎么能快捷的由一维数组生成多维数组：
我有一个字段是字符串，值可能是1或1-2或1-2-3-4-5...

例如如果是1-2-3-4,怎么能生成为多维数组:

<code>Array
(
    [1] =&gt; Array
        (
            [2] =&gt; Array
                (
                    [3] =&gt; Array
                        (
                            [4] =&gt; Array
                                (
                                )

                        )

                )

        )

)</code>

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多谢

回复内容：

一直不太明白，怎么能快捷的由一维数组生成多维数组：
我有一个字段是字符串，值可能是1或1-2或1-2-3-4-5...

例如如果是1-2-3-4,怎么能生成为多维数组:

<code>Array
(
    [1] =&gt; Array
        (
            [2] =&gt; Array
                (
                    [3] =&gt; Array
                        (
                            [4] =&gt; Array
                                (
                                )

                        )

                )

        )

)</code>

Copy after login

多谢

// from https://segmentfault.com/q/1010000004647414
$str = '1-2-3-4';
$arr = explode('-', $str);
$last = null;
while($last = array_pop($arr)) {
    if(null != $last) {
       array_push($arr,[array_pop($arr)=>$last]);
    }
    if(count($arr) <= 1) {
        break;
    }
 }
 print_r($arr[0]);
/*Array
(
    [] => Array
        (
            [1] => Array
                (
                    [2] => Array
                        (
                            [3] => 4
                        )

                )

        )

)*/

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看看有什么科学计算包里的矩阵转置函数吧

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