将类似于数组语法的平面字符串数组转换为二维数组

Question

我不知道如何有效地将这个数组的值从字符串转换为数组。我真的很感激任何建议。

    array(6) {
  ["A"]=>
  string(31) "['B' => 3, 'C' => 5, 'D' => 9],"
  ["B"]=>
  string(41) "['A' => 3, 'C' => 3, 'D' => 4, 'E' => 7],"
  ["C"]=>
  string(51) "['A' => 5, 'B' => 3, 'D' => 2, 'E' => 6, 'F' => 3],"
  ["D"]=>
  string(51) "['A' => 9, 'B' => 4, 'C' => 2, 'E' => 2, 'F' => 2],"
  ["E"]=>
  string(41) "['B' => 7, 'C' => 6, 'D' => 2, 'F' => 5],"
  ["F"]=>
  string(31) "['C' => 3, 'D' => 2, 'E' => 5],"
}

所需输出：

    $graph = [
    'A' => ['B' => 3, 'C' => 5, 'D' => 9],
    'B' => ['A' => 3, 'C' => 3, 'D' => 4, 'E' => 7],
    'C' => ['A' => 5, 'B' => 3, 'D' => 2, 'E' => 6, 'F' => 3],
    'D' => ['A' => 9, 'B' => 4, 'C' => 2, 'E' => 2, 'F' => 2],
    'E' => ['B' => 7, 'C' => 6, 'D' => 2, 'F' => 5],
    'F' => ['C' => 3, 'D' => 2, 'E' => 5],
 ];

Answer 1

似乎您正在尝试将数组字符串转换为数组。

您可以通过循环重复或使用函数来获得所需的输出。

我正在使用 正则表达式 和 preg_match_all

代码

$rawArray  =  array("A"=>"['B' => 3, 'C' => 5, 'D' => 9],",
    "B"=>"['A' => 3, 'C' => 3, 'D' => 4, 'E' => 7],",
    "C"=>"['A' => 5, 'B' => 3, 'D' => 2, 'E' => 6, 'F' => 3],",
    "D"=>"['A' => 9, 'B' => 4, 'C' => 2, 'E' => 2, 'F' => 2],",
    "E"=>"['B' => 7, 'C' => 6, 'D' => 2, 'F' => 5],",
    "F"=>"['C' => 3, 'D' => 2, 'E' => 5],",
);
foreach($rawArray as $k => $v){
preg_match_all("/\'(.)\'/", $v, $key);
preg_match_all("/=> (\d)/", $v, $val);
$graph[$k] = array_combine($key[1], $val[1]);
}
print_r($graph);

输出

Array
(
    [A] => Array
        (
            [B] => 3
            [C] => 5
            [D] => 9
        )

    [B] => Array
        (
            [A] => 3
            [C] => 3
            [D] => 4
            [E] => 7
        )

    [C] => Array
        (
            [A] => 5
            [B] => 3
            [D] => 2
            [E] => 6
            [F] => 3
        )

    [D] => Array
        (
            [A] => 9
            [B] => 4
            [C] => 2
            [E] => 2
            [F] => 2
        )

    [E] => Array
        (
            [B] => 7
            [C] => 6
            [D] => 2
            [F] => 5
        )

    [F] => Array
        (
            [C] => 3
            [D] => 2
            [E] => 5
        )

)

现场演示

说明：

$rawArray是关联数组，它的每个元素都包含类似于php数组的字符串。
我们循环遍历数组并使用 preg_match_all 将该字符串转换为数组并构建 $graph 多维数组。
当循环第一次执行时
```
$k
```
等于
```
A
```
且
```
$v
```
等于
```
['B' => 3, 'C' => 5, 'D' => 9],
```
首先preg_match_all从$v（
```
['B' => 3, 'C' => 5, 'D' => 9],
```
）创建键数组，并将其分配给
```
$key[1]
```
。现在
```
$key[1]
```
是数组
```
['B', 'C', 'D']
```
。
第二个 preg_match_all 从 $v (['B' => 3, 'C' => 5, 'D' => 9],) 创建值数组，并将其分配给
```
$val[1]
```
。现在
```
$val[1]
```
是数组
```
[2, 5, 9]
```
。
我们通过使用
```
array_combine
```
将
```
$key[1]
```
组合为键，将 $val[1] 组合为值，其中
```
$graph[$k]
```
是
```
$k
```
。

preg_match_all 是如何工作的？

A

它匹配字符串中的模式，然后将结果作为数组分配给

preg_match_all($pattern, $string, $out);

。

了解更多。

preg_match_all
正则表达式模式备忘单

注意：

我们使用非捕获模式，因此它返回精确匹配和所需匹配...因此我们所需的记录在$out中找到。

Answer 2

$key[1]

输出

<?php $graph = array("A"=>"['B' => 3, 'C' => 5, 'D' => 9],", "B"=>"['A' => 3, 'C' => 3, 'D' => 4, 'E' => 7],", "C"=>"['A' => 5, 'B' => 3, 'D' => 2, 'E' => 6, 'F' => 3],", "D"=>"['A' => 9, 'B' => 4, 'C' => 2, 'E' => 2, 'F' => 2],", "E"=>"['B' => 7, 'C' => 6, 'D' => 2, 'F' => 5],", "F"=>"['C' => 3, 'D' => 2, 'E' => 5],", ); foreach ($graph as $key => $value) { $val = str_replace("[","{",$value); $val = str_replace("]","}",$val); $val = str_replace("'",'"',$val); $val = str_replace("=>",":",$val); $val = rtrim($val, ','); $graph[$key] = json_decode($val, true); } echo "<pre>"; print_r($graph); echo "</pre>";

Answer 3

我下载了您的

文件并在本地运行，以便源与您所说的完全一样。然后我继续解析它并将字符串值转换为实际的数组 现在的样子：

Array ( [A] => Array ( [B] => 3 [C] => 5 [D] => 9 ) [B] => Array ( [A] => 3 [C] => 3 [D] => 4 [E] => 7 ) [C] => Array ( [A] => 5 [B] => 3 [D] => 2 [E] => 6 [F] => 3 ) [D] => Array ( [A] => 9 [B] => 4 [C] => 2 [E] => 2 [F] => 2 ) [E] => Array ( [B] => 7 [C] => 6 [D] => 2 [F] => 5 ) [F] => Array ( [C] => 3 [D] => 2 [E] => 5 ) )

最终结果：

// Parse graph.json file $json = json_decode(file_get_contents('graph.json'), true); foreach ($json as $key => $value) { foreach ($value as $k => $val) { $str = str_replace(['[', ']'], '', $val); $str = str_replace(' => ', ',', $str); $str = str_replace("'", "", $str); $str = explode(',', $str); for ($x = 0; $x < count($str); $x = $x + 2) { $graph[$k][trim($str[$x])] = $str[$x+1]; } } } // Result echo "<pre>"; print_r($graph); // Proof it is an array now (result 3) // echo '<pre>'; // print_r($graph['A']['B']);

如果您运行下面的预期输出示例，然后将输出与我的输出进行比较，它是相同的：

Array ( [A] => Array ( [B] => 3 [C] => 5 [D] => 9 ) [B] => Array ( [A] => 3 [C] => 3 [D] => 4 [E] => 7 ) [C] => Array ( [A] => 5 [B] => 3 [D] => 2 [E] => 6 [F] => 3 ) [D] => Array ( [A] => 9 [B] => 4 [C] => 2 [E] => 2 [F] => 2 ) [E] => Array ( [B] => 7 [C] => 6 [D] => 2 [F] => 5 ) [F] => Array ( [C] => 3 [D] => 2 [E] => 5 ) )

Answer 4

$graph = [ 'A' => ['B' => 3, 'C' => 5, 'D' => 9], 'B' => ['A' => 3, 'C' => 3, 'D' => 4, 'E' => 7], 'C' => ['A' => 5, 'B' => 3, 'D' => 2, 'E' => 6, 'F' => 3], 'D' => ['A' => 9, 'B' => 4, 'C' => 2, 'E' => 2, 'F' => 2], 'E' => ['B' => 7, 'C' => 6, 'D' => 2, 'F' => 5], 'F' => ['C' => 3, 'D' => 2, 'E' => 5], ]; echo '<pre>'; print_r($graph);

但请记住：评估是邪恶的。如果您不信任输入，则需要编写自己的解析器。

为了澄清而进行的临时编辑。这是我运行你的 github 示例时得到的结果

//or $graph instead of $result
$result = array_map(function($value) {
    //use eval to directly evaluate the string
    //we just need to remove the trailing comma
    //and add a semicolon
    eval('$ret = '.rtrim($value,',').';');
    return($ret);
}, $array); // replace $array with the var name of your array!

:

json_decode(...,true)

这与你的问题不同。

将类似于数组语法的平面字符串数组转换为二维数组

问题描述投票：0回答：4

4个回答

最新问题

将类似于数组语法的平面字符串数组转换为二维数组

问题描述 投票：0回答：4

4个回答

最新问题

问题描述投票：0回答：4