php - 在for循环php中创建数组

Question

This question already has answers here:

Transposing multidimensional arrays in PHP

（12个答案）


12个月前关闭。





这是我的数组：

$result = [["space 1","space 2","space 3"],["150 x 150","250 x 
250","350 x 350"],["50","100", "150"]];

我正在尝试获得以下结果。

Array
(
 [0] => Array
    (
        [0] => "space 1"
        [1] => "150 x 150"
        [2] => "50"

    )

[1] => Array
    (
        [0] => "space 2"
        [1] => "250 x 250"
        [2] => "100"
    )

[2] => Array
    (
        [0] => "space 3"
        [1] => "350 x 350"
        [2] => "150"
    )

)

这就是我得到的

    $new_result = [];

$y = 0;

for ($x = 0; $x < count($result); $x++) {
    foreach ($result as $value) {
        $new_result [$y][$x] = $value[$x];

        //echo $value[$x];
        //echo "<br>";

    }

    $y++;
    echo "<hr>";
}

print_r($new_result);

我已经尝试使用 .=将值附加到该值，但是却收到一条错误消息，指出未定义偏移量：0。

最佳答案

在您的foreach上添加$ key就像这样foreach ($result as $key => $value)

然后在$ new_result上将$ x更改为$ key。请看下面

for ($x = 0; $x < count($result); $x++) {

    foreach ($result as $key => $value) {

      $new_result [$y][$key] = $value[$x];

       //echo $value[$x];
       //echo "<br>";

    }

    $y++;

    echo "<hr>";

}
``

关于php - 在for循环php中创建数组，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/57552745/

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Answer 1

在您的foreach上添加$ key就像这样foreach ($result as $key => $value)

然后在$ new_result上将$ x更改为$ key。请看下面

for ($x = 0; $x < count($result); $x++) {

    foreach ($result as $key => $value) {

      $new_result [$y][$key] = $value[$x];

       //echo $value[$x];
       //echo "<br>";

    }

    $y++;

    echo "<hr>";

}
``