如何从SimpleXMLElement对象数组提取键值并格式化输出（PHP）

开发者阿泽

2026-5-21

Hey there! Let's walk through how to generate that exact formatted string from your SimpleXMLElement structure in PHP.

Solution Code

First, let's assume your original XML object is stored in a variable called $xmlObj. Here's a clean, readable approach to get the output you want:

// Your original SimpleXMLElement Object
$xmlObj = ...; // Replace with your actual object

$formattedSegments = [];

// Iterate over each item with its index
foreach ($xmlObj->items as $index => $item) {
    // Collect each name-value pair as a string
    $itemDetails = [];
    foreach ($item as $name => $value) {
        $itemDetails[] = "$name $value";
    }
    
    // Build the line for this index: "index, name1 val1, name2 val2..."
    $segment = "$index, " . implode(", ", $itemDetails);
    $formattedSegments[] = $segment;
}

// Combine all segments into the final output string
$finalOutput = implode(" ", $formattedSegments);

// Output the result
echo $finalOutput;

How This Works

Loop through items: Using foreach ($xmlObj->items as $index => $item) lets us grab both the position (0, 1, 2) and the corresponding child object for each entry.
Process each item: For every child element in the item (like walson or nelson), we create a string like "walson 986" and add it to an array.
Build index-specific lines: We join those name-value strings with ", ", then prepend the index to make a line like "0, walson 986, john 01, merry 234".
Combine everything: Finally, we join all those index lines with a space to get the full formatted string you need.

When you run this with your provided structure, you'll get exactly the output you're looking for: