PHP中如何将XML转换为指定嵌套结构的数组？

Hey there! Let's sort out this XML-to-array conversion issue you're facing. The problem with your current code is that simplexml_load_file() returns a SimpleXMLElement object, not a plain PHP array. We need to convert this object into the nested array format you specified. Here are two reliable solutions:

Method 1: Quick Conversion with JSON Encode/Decode #

This is a fast, low-effort way to get your target array, with a quick cleanup step to fix the extra > in your XML's <a> elements:

$file = "product.xml";
$xml = simplexml_load_file($file) or die("ERROR loading file");

// Convert the SimpleXMLElement object to a raw array
$rawArray = json_decode(json_encode($xml), true);

// Extract the article data and format it to match your desired structure
$testArray = $rawArray['article'];

// Clean up the trailing ">" in the <a> values (matches your expected output)
foreach ($testArray as &$item) {
    $item['a'] = rtrim($item['a'], '>');
}

// Verify the result
print_r($testArray);

This will output exactly the array you want:

Array
(
    [0] => Array
        (
            [a] => TEST
            [b] => TEST2
            [c] => TEST3
        )

    [1] => Array
        (
            [a] => TEST4
            [b] => TEST5
            [c] => TEST6
        )

)

Method 2: Manual Traversal (Full Control) #

If you want more control over the conversion (e.g., handling edge cases or custom transformations), loop through each <article> element manually:

$file = "product.xml";
$xml = simplexml_load_file($file) or die("ERROR loading file");
$testArray = [];

foreach ($xml->article as $article) {
    $testArray[] = [
        'a' => rtrim((string)$article->a, '>'), // Cast to string + clean up
        'b' => (string)$article->b,
        'c' => (string)$article->c
    ];
}

// Verify the result
print_r($testArray);

Key Details to Remember: #

• Casting to String: When accessing SimpleXMLElement properties (like $article->a), always cast to a string with (string)—this pulls out the actual text content instead of returning an object.
• Special Character Cleanup: Your XML includes TEST> and TEST4> in the <a> tags. The rtrim() call removes the trailing > to match your expected output. If this was a typo in your XML, you could fix the source file instead, but the code handles it either way.

内容的提问来源于stack exchange，提问作者Chris