PHP and XML. Looping through an XML file with PHP

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情书的邮戳
情书的邮戳 2021-01-14 17:07

I am knee deep in foreach purgatory right now trying to come up with a way to traverse this XML file (actual XML text below) with PHP(following the XML file content.) What I

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  •  余生分开走
    2021-01-14 18:03

    You could try use xpath instead of your nested loops method..

    Running the query

    gallerylisting//folder[@subfolder="yes"]/text() 
    

    on your xml doc given above using this xpath tester gives the results Events and Beach_Clean_2010, which is what I think you want. The query will find all folder elements under the root node gallerylisting, and if they have a subfolder attribute equal to "yes", the text in the node will be returned.

    So, in PHP, we have

    load('gallerylisting.xml');
    
        $xpathvar = new Domxpath($xmldoc);
    
        $queryResult = $xpathvar->query('gallerylisting//folder[@subfolder="yes"]/text()');
        foreach($queryResult as $result){
                echo $result->textContent;
        }
    ?>
    

    Im not a PHP guy, so I am trusting the code in this StackOverflow question works. One thing to be aware of is that using the //name in xpath means find all nodes descended from the current position that match the name. This can be very slow on large documents.

    It seems there is multiple ways to process xpath with PHP. An example from this page does the query like so:

       $result = $xml->xpath("gallerylisting//folder[@subfolder="yes"]/text()");
    
       print_r($result);
    ?> 
    

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