PHP | SimpleXMLIterator key() Function

PHP | SimpleXMLIterator key() Function

Last Updated : 29 Aug, 2019

The SimpleXMLIterator::key() function is an inbuilt function in PHP which is used to return the key of current element. Syntax:

mixed SimpleXMLIterator::key( void )

Parameters: This function does not accept any parameters. Return Value: This function returns the XML tag name of the element SimpleXMLIterator object on success or FALSE on failure. Below program illustrates the SimpleXMLIterator::key() function in PHP: Program:

<?php

// Store the xml element to variable
$xml = <<<XML
    <organization>
        <name>GeeksforGeeks</name>
        <address>Noida India</address>
        <contact>
            <email>abc@geeksforgeeks.org</email>
            <mobile>+91-987654321</mobile>
        </contact>
    </organization>
XML;

$xmlIt = new SimpleXMLIterator($xml);

// Loop starts from first element of xml and 
// run upto when elements are not valid
for( $xmlIt->rewind(); $xmlIt->valid(); $xmlIt->next() ) {
    
    var_dump($xmlIt->key());
}

?>

 
<?php
​// Store the xml element to variable$xml = <<<XML    <organization>        <name>GeeksforGeeks</name>        <address>Noida India</address>        <contact>            <email>abc@geeksforgeeks.org</email>            <mobile>+91-987654321</mobile>        </contact>    </organization>XML;​$xmlIt = new SimpleXMLIterator($xml);​// Loop starts from first element of xml and // run upto when elements are not validfor( $xmlIt->rewind(); $xmlIt->valid(); $xmlIt->next() ) {        var_dump($xmlIt->key());}​?>

Output:

string(4) "name"
string(7) "address"
string(7) "contact"

Reference: https://www.php.net/manual/en/simplexmliterator.key.php

PHP | SimpleXMLIterator key() Function

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