PHP 从字符串到占位符手中的多个数组

Question

美好的一天，

我有一个我觉得很奇怪的问题，我也不知道怎么问这个问题。

我想创建一个如下所示的字符串变量：

[car]Ford[/car]
[car]Dodge[/car]
[car]Chevrolet[/car]
[car]Corvette[/car]
[motorcycle]Yamaha[/motorcycle]
[motorcycle]Ducati[/motorcycle]
[motorcycle]Gilera[/motorcycle]
[motorcycle]Kawasaki[/motorcycle]

这应该被处理并且看起来像：

$variable = array(
    'car' => array(
        'Ford',
        'Dodge',
        'Chevrolet',
        'Corvette'
        ),
    'motorcycle' => array(
        'Yamaha',
        'Ducati',
        'Gilera',
        'Kawasaki'
    )
);

有人知道怎么做吗？我想做的事情叫什么？

I want to explode the string into the two arrays. If it is a sub array or two individual arrays. I do not care. I can always combine the latter if I wish so.

But from the above mentioned string to two arrays. That is what I want.

Solution by Dlporter98

<?php
///######## GET THE STRING FILE OR DIRECT INPUT
// $str = file_get_contents('file.txt');
$str = '[car]Ford[/car]
[car]Dodge[/car]
[car]Chevrolet[/car]
[car]Corvette[/car]
[motorcycle]Yamaha[/motorcycle]
[motorcycle]Ducati[/motorcycle]
[motorcycle]Gilera[/motorcycle]
[motorcycle]Kawasaki[/motorcycle]';

$str = explode(PHP_EOL, $str);

$finalArray = [];
foreach($str as $item){
    //Use preg_match to capture the pieces of the string we want using a regular expression.
    //The first capture will grab the text of the tag itself.
    //The second capture will grab the text between the opening and closing tag.
    //The resulting captures are placed into the matches array.
    preg_match("/\[(.*?)\](.*?)\[/", $item, $matches);

    //Build the final array structure.
    $finalArray[$matches[1]][] = $matches[2];
}

print_r($finalArray);
?>

This gives me the following array:

Array
(
    [car] => Array
        (
            [0] => Ford
            [1] => Dodge
            [2] => Chevrolet
            [3] => Corvette
        )

    [motorcycle] => Array
        (
            [0] => Yamaha
            [1] => Ducati
            [2] => Gilera
            [3] => Kawasaki
        )

)

The small change I had to make was:

Change

   $finalArray[$matches[1]] = $matches[2]

To:

   $finalArray[$matches[1]][] = $matches[2];

Thanks a million!!

Answer 1

为什么不创建两个单独的数组？

$cars = array("Ford", "Dodge", "Chevrolet", "Corvette");

$motorcycle = array("Yamaha", "Ducati", "Gilera", "Kawasaki");

您也可以使用关联数组来执行此操作。

$variable = array("Ford"=>"car", "Yamaha"=>"motorbike");

Answer 2

有多种方法可以将此字符串中的信息转换为关联数组。

使用 explode 函数将新行上的字符串拆分为一个数组：

$str = "[car]Ford[/car]
[car]Dodge[/car]
[car]Chevrolet[/car]
[car]Corvette[/car]
[motorcycle]Yamaha[/motorcycle]
[motorcycle]Ducati[/motorcycle]
[motorcycle]Gilera[/motorcycle]
[motorcycle]Kawasaki[/motorcycle]";

$items = explode(PHP_EOL, $str);

此时每个分隔项现在都是一个数组条目。

Array
(
    [0] => [car]Ford[/car]
    [1] => [car]Dodge[/car]
    [2] => [car]Chevrolet[/car]
    [3] => [car]Corvette[/car]
    [4] => [motorcycle]Yamaha[/motorcycle]
    [5] => [motorcycle]Ducati[/motorcycle]
    [6] => [motorcycle]Gilera[/motorcycle]
    [7] => [motorcycle]Kawasaki[/motorcycle]
)

接下来，遍历数组并使用 preg_match function with a regular expression:

提取构建最终关联数组所需的适当部分

$finalArray = [];
foreach($items as $item)
{
    //Use preg_match to capture the pieces of the string we want using a regular expression.
    //The first capture will grab the text of the tag itself.
    //The second capture will grab the text between the opening and closing tag.
    //The resulting captures are placed into the matches array.
    preg_match("/\[(.*?)\](.*?)\[/", $item, $matches);

    //Build the final array structure.
    $finalArray[$matches[1]] = $matches[2]
}

以下是将在 foreach 循环的给定迭代的 matches 数组中找到的内容的示例。

Array
(
    [0] => [motorcycle]Gilera[
    [1] => motorcycle
    [2] => Gilera
)

请注意，我使用 PHP_EOL 常量来展开初始字符串。如果字符串是从与您运行此代码所在的操作系统不同的操作系统中提取的，则这可能不起作用。您可能需要将其替换为字符串正在使用的实际行尾字符。

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