simpleXML get node child based on attribute [duplicate]

I am trying to parse out the value of a node I am referencing by one of its attributes. but I am not sure of the syntax

XML:

<data>

  <poster name="E-Verify" id="everify">

    <full_image url="e-verify-swa-poster.jpg"/>

    <full_other url=""/>

  </poster>


  <poster name="Minimum Wage" id="minwage">

    <full_image url="minwage.jpg"/>

    <full_other url="spa_minwage.jpg"/>

  </poster>
</data>

here is where I want to get the url value of full_image where poster id equal to minwage:

$xml = simplexml_load_file('PosterData.xml');
$main_url = $xml->full_image[name] where poster[id] = "minwage";
//something like that.
echo $main_url;

Result: minwage.jpg

If anyone has any resources that cover this stuff please share.

Simply loop the poster elements and remember to cast the attribute values to strings, since you want to compare them (and probably output them) as strings:

$xml = simplexml_load_file('PosterData.xml');

foreach ($xml->poster as $poster) {
    if ((string) $poster['id'] == 'minwage') {
        echo (string) $poster->full_image['url'];
    }
}

kingcoyote

You should be able to use SimpleXMLElement::xpath() to run an xpath query on a simple XML document.

$xml = simplexml_load_file('PosterData.xml');
$main_url = $xml->xpath('name[@id="minwage"]/full_image')[0];

echo $main_url;

Rinto George

You can use:

$object = simplexml_load_string('<data><poster name="E-Verify" id="everify"><full_image url="e-verify-swa-poster.jpg"/><full_other url=""/></poster><poster name="Minimum Wage" id="minwage"><full_image url="minwage.jpg"/><full_other url="spa_minwage.jpg"/></poster></data>');

foreach ($object as $value) {
    echo "URL: ".$value->full_image->attributes();
    echo "<br>";
}

Either use simplexml_load_file('Some external file.xml') if calling external file.

来源：https://stackoverflow.com/questions/9696545/simplexml-get-node-child-based-on-attribute

标签

php

xml

simplexml