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mchelen/index.php

Last active March 1, 2024 15:23
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PHP SimpleXML Missing Node Test
Raw
index.php
<?php
/*
ways of checking if simplexml node exists:
isset()
count()
empty()
boolean
tested with PHP 5.5.23
*/
$xml_string = "<?xml version='1.0' encoding='UTF-8'?>
<root>
<note>
<to>Tove</to>
<from>Jani</from>
<content>
<summary>Weekend</summary>
<body>Don't forget me this weekend!</body>
</content>
</note>
</root>";
$xml = simplexml_load_string($xml_string);
$foo = $xml->note;
// isset()
echo PHP_EOL;
if(isset($xml->note->to)) {echo '"to" exists using isset()';}
else {echo '"to" does not exist using isset()';}
echo PHP_EOL;
if(isset($xml->note->bar)) {echo '"bar" exists using isset()';}
else {echo '"bar" does not exist using isset()';}
echo PHP_EOL;
// count()
echo PHP_EOL;
if(count($xml->note->to)>0) {echo '"to" exists using count()';}
else {echo '"to" does not exist using count()';}
echo PHP_EOL;
if(count($xml->note->bar)>0) {echo '"bar" exists using count()';}
else {echo '"bar" does not exist using count()';}
echo PHP_EOL;
// empty()
echo PHP_EOL;
if( !empty($xml->note->to)){echo '"to" exists using empty()';}
else {echo '"to" does not exist using empty()';}
echo PHP_EOL;
if( !empty($xml->note->bar)){echo '"bar" exists using empty()';}
else {echo '"bar" does not exist using empty()';}
echo PHP_EOL;
// boolean
echo PHP_EOL;
if( $xml->note->to){echo '"to" exists using boolean';}
else {echo '"to" does not exist using boolean';}
echo PHP_EOL;
if( $xml->note->bar){echo '"bar" exists using boolean';}
else {echo '"bar" does not exist using boolean';}
echo PHP_EOL;
?>
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