PHP | SimpleXMLElement attributes() Function

Pre-requisite: Read XML Basics
The SimpleXMLElement::attributes() function is an inbuilt function in PHP which is used to retrieve the attributes and its value from an XML tag in a SimpleXML object.

Syntax:

SimpleXMLElement SimpleXMLElement::attributes( $namespace, $is_prefix )

Parameter: This function accepts two parameters as mentioned above and described below:  

• $namespace: It is optional parameter. It specifies the namespace for retrieved Attribute.
• $is_prefix: It is boolean parameter. It is True if $namespace is a prefix and False if $namespace is URI. Its default value is False.

Return Value: It returns a SimpleXMLElement object which can be iterated over attributes of a tag of the SimpleXMLElement object. It returns null if the SimpleXMLElement Object is already an attribute not a tag.
Note: This function is available on PHP 5.0.1 and newer version.
Below programs illustrate the SimpleXMLElement::attributes() function in PHP:
Program 1:

php

<?php

// Loading XML document to $user
$user = <<<XML
<user>
    <username>
        Geeks123
    </username>

    <name>
        GeeksforGeeks
    </name>

    <phone>
        +91-XXXXXXXXXX
    </phone>

    <address font-color="blue" font="awesome-fonts"
            font-size="24px">
        Noida, UP, India
    </address>
</user>
XML;

// Loading string as simple xml object
$xml = simplexml_load_string($user);

// Print children attribute with its value
foreach($xml->address[0]->attributes() as $key => $value)
{
    echo $key . " => " . $value . "</br>";
}

?>

Output:

font-color => blue
font => awesome-fonts
font-size => 24px

Program 2:

php

<?php

// Loading XML document to $user
$user = <<<XML
<user>
    <username font-color="green"
            font="awesome-fonts" font-size="72px">
        Geeks123
    </username>

    <name font-color="blue" font="awesome-fonts"
            font-size="36px">
        GeeksforGeeks
    </name>

    <phone font-color="blue" type="number"
            font="awesome-fonts" font-size="24px">
        +91-XXXXXXXXXX
    </phone>

    <address font-color="blue" font="awesome-fonts"
            font-size="24px">
        Noida, UP, India
    </address>
</user>
XML;

// Loading string as simple xml object
$xml = simplexml_load_string($user);

// Print children attribute
foreach($xml->children() as $child) {
    echo "Child name: " . $child->getName()
            . " =>" . $child . "<br>";

    foreach($child->attributes() as $key => $value)
        echo "      parameter: "
                . $key . " => " . $value . "</br>";
}

?>

Output:

Child name: username => Geeks123 
     parameter: font-color => green
     parameter: font => awesome-fonts
     parameter: font-size => 72px
Child name: name => GeeksforGeeks 
     parameter: font-color => blue
     parameter: font => awesome-fonts
     parameter: font-size => 36px
Child name: phone => +91-XXXXXXXXXX 
     parameter: font-color => blue
     parameter: type => number
     parameter: font => awesome-fonts
     parameter: font-size => 24px
Child name: address => Noida, UP, India 
     parameter: font-color => blue
     parameter: font => awesome-fonts
     parameter: font-size => 24px

Reference: https://www.php.net/manual/en/simplexmlelement.attributes.php