如何在PHP中将数组划分为二维数组

I have an array like below.

我有一个如下所示的数组。

$arr=array('0_1','0_3','1_2',1_1','4_1');

can i divide it into

我可以把它分成

$arr[0][1]='0_1';
$arr[0][3]='0_3';

... Thanks.

... 谢谢。

3 个解决方案

#1

$newArray = [];
foreach ($arr as $item) {
    $items = explode('_', $item);
    $newArray[$items[0]][$items[1]] = $item;
}
var_dump($newArray);
exit();

This should do the trick. You should have a look at the explode function

这应该可以解决问题。你应该看看爆炸功能

#2

Another way to do this without foreach loop. :->

另一种没有foreach循环的方法。 - >

$arr = array('0_1','0_3','1_2','1_1','4_1');
$result = [];
array_walk($arr,function($v,$k)use (&$result){
    $data = explode("_",$v);
    $result[$data[0]][$data[1]] = $v;
});
print_r($result);

#3

$arrv = array('0_1','0_3','1_2','1_1','4_1');
$newArray = [];
array_walk($arrv,function($value,$key){
    global $newArray;
    $indexArray = explode("_",$value);
    $newArray[$indexArray[0]][$indexArray[1]] = $value;
});
var_dump($newArray);

#1

$newArray = [];
foreach ($arr as $item) {
    $items = explode('_', $item);
    $newArray[$items[0]][$items[1]] = $item;
}
var_dump($newArray);
exit();