Problems with php xpath

Question

I do a cURL POST and return an error response, parse it in an array, but now I have problems with xpath.

// XML

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<errors xmlns="http://host/project">
   <error code="30" description="[] is not a valid email address."/>
   <error code="12" description="id[] does not exist."/>
   <error code="3" description="account[] does not exist."/>
   <error code="400" description="phone[] does not exist."/>
</errors>

// Function / Class

class parseXML
{
    protected $xml;

    public function __construct($xml) {
        if(is_file($xml)) {
            $this->xml = simplexml_load_file($xml);
        } else {
            $this->xml = simplexml_load_string($xml);
        }
    }

    public function getErrorMessage() {
        $in_arr = false;
        $el = $this->xml->xpath("//@errors");        
        $returned_errors = count($el);

        if($returned_errors > 0) {
            foreach($el as $element) {
                if(is_object($element) || is_array($element)) {
                    foreach($element as $item) {
                        $in_arr[] = $item;
                    }
                }
            }
        } else {
            return $returned_errors;
        }            
        return $in_arr;
    }
}

// call function

// $errorMessage is holding the XML value in an array index
// something like: $arr[3] = $xml;
$errMsg = new parseXML($arr[3]); 
$errMsgArr = $errMsg->getErrorMessage();

What I would like is all the error code attribute and description values

EDIT:

OK this is print_r ($ this-> xml, true);

SimpleXMLElement Object
(
    [error] => Array
        (
            [0] => SimpleXMLElement Object
                (
                    [@attributes] => Array
                        (
                            [code] => 30
                            [description] => [] is not a valid email address.
                        )

                )

            [1] => SimpleXMLElement Object
                (
                    [@attributes] => Array
                        (
                            [code] => 12
                            [description] => Id[12345] does not exist.
                        )

                )

            [2] => SimpleXMLElement Object
                (
                    [@attributes] => Array
                        (
                            [code] => 3
                            [description] => account[] does not exist.
                        )

                )

            [3] => SimpleXMLElement Object
                (
                    [@attributes] => Array
                        (
                            [code] => 400
                            [description] => phone[] does not exist.
                        )

                )

        )

)

for life, I can’t understand why I can get the code and description, any thoughts?

EDIT No. 2 Okay, I think I will break it.

I use cURL to send a request to one of our servers, I parse the HTTP and xml response headers (if xml is returned). each line in the header / xml I explode into an array. therefore, if there is an error, I see an additional index for the array. Then I do something like this.

$if_err_from_header = $http_return_response[10]; 
// I know that index 10 is where if any the error message in xml is (the one posted above).

after that i do this:

$errMsg = new parseXML($if_err_from_header); 
$errMsgArr = $errMsg->getErrorMessage();

still I can’t get the code and description from the attributes with an error, what am I missing?

№ 3 , ?

$in_arr = false;
// This returns all the code attributes
$el = $this->xml->xpath("//@code");

# if $el is false, nothing returned from xpath(), set to an empty array
$el = $el == false ? array() : $el;

foreach($el as $element) {
    $in_arr[] = array("code" => $element["code"], "description" => $element["description"]);
}
return $in_arr;

№ 4:

, , , , , ...

$el = $this->xml->xpath("//*");

Answer 1

, :

$this->xml->registerXPathNamespace('n', 'http://host/project');
$el = $this->xml->xpath("/n:errors/n:error");
$returned_errors = count($el);

.

foreach($el as $element) {
   print "code: " . $element["code"] . "\n";
}

Answer 2

@ XPath - . , :

  $el = $this->xml->xpath("/errors");

,

  $el = $this->xml->xpath("/errors/error");

  $el = $this->xml->xpath("//error");