CODEWITHSUNDEEP
phpxml
darox
darox

Reputation: 27

Showing XML responses using variables

Can you help me? I'm facing a strange problem when parsing my XML.

Here is my PHP script:

$xml = "https://pastebin.com/raw/30QHhFSr";
$response = new SimpleXMLElement(file_get_contents($xml)) or die('error');

$auto = "ENDS->E0->ENDERECO";

echo $response->$auto; //output: nothing
echo $response->ENDS->E0->ENDERECO; //output: SAO SEVERINO //works

Why $response->$auto; is not working?

Thank you.

Upvotes: 1

Views: 49

Answers (2)

Rakesh Jakhar
Rakesh Jakhar

Reputation: 6388

->, is used when you want to call a method on an instance or access an instance property

SimpleXMLElement - Represents an element in an XML document.

$response is an instance of SimpleXMLElement, You need to define like this

$level1 = "ENDS";
$level2 = "E0";
$level3 = "ENDERECO";

Now you can retrieve the value using

$response->$level1->$level2->$level3;

Upvotes: 0

Kevin
Kevin

Reputation: 41885

What getting is correct since your arrow notation is actually a string literal, which in itself doesn't do anything when you do:

$auto = "ENDS->E0->ENDERECO";

echo $response->$auto;
echo $response->{"ENDS->E0->ENDERECO"}; // it doesn't really exist

The alternative is you can process the string and break it down using explode, and use array reduce.

Here's the idea:

$xml = 'https://pastebin.com/raw/30QHhFSr';
$response = new SimpleXMLElement(file_get_contents($xml)) or die('error');
$auto = 'ENDS->E0->ENDERECO';
echo array_reduce(explode('->', $auto), function ($o, $p) { 
    return $o->$p; 
}, $response);

Upvotes: 1

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