Question 258541 in PHP Question posted in
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How to pass a string from a php variable into an xml request?

I probably composed my question very stupidly, but I did the best I could, I apologize in advance)

I have an XML file.
I need to run a query like this:

$xml->shop->offers->offer

The problem is that I get this path from a variable:

$path = 'shop->offers->offer'

But it won’t work like this:

$xml = simplexml_load_file('example.com');
$exampleElement = $xml->$path;

How can I fix the code so it works?

Tags:

2

Answers


  1. 0

    You could split the path into its components and loop through them to navigate through the SimpleXML object.

    One way to do this is to use explode(). It’s a built-in PHP function used to split a string into an array of substrings based on a specified substring at which the input string will be split. In this case it could be used to split the path stored in the $path variable into an array of components, which are then used to move through the XML structure.

    https://www.php.net/manual/en/function.explode.php

    You could try …

    // Split the path into its components
$pathComponents = explode('->', $path);

// Start with the root element
$currentElement = $xml;

// Loop thru the path components and navigate thru the XML
foreach ($pathComponents as $component) {
    if (isset($currentElement->$component)) {
        $currentElement = $currentElement->$component;
    } else {
        // You can throw an exception or handle it according to your needs
        // in this example, I just broke out of the loop
        break;
    }
}

// $currentElement should now contain the desired XML element

    https://www.php.net/manual/en/function.isset.php

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  2. 0

    Split the path, then loop over it getting each nested property.

    $props = explode("->", $path);
$el = $xml;
foreach ($props as $prop) {
    $el = $el->$prop;
}
var_dump($el);
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