PHP simpleXML: parse specific attribute value of multiple entries

Question

I have the following XML:

<doc>
    <str name="segment">20170913064727</str>
    <str name="digest">427522d5ceb605f87755c909deac698a</str>
    <str name="title">AMS Site</str>
<doc>

I want to parse it and to save the value of "title" to the variable $ergTitle (that would be "AMS Site").

I have the following PHP code:

foreach($data->result->doc as $dat) {
    foreach ($dat->str as $att) {
        foreach ($att->attributes() as $a => $b) {
            echo $a,'="',$b,"\"\n" . '<br>';
            if ($b=='title') {
                echo "OK";
            }
        }
    }
}

Which results to:

name="segment" 
name="digest" 
name="id" 
name="title" 
OKname="url" 
name="content"

But how can I now get the value of name="title" and save it to my variable?

Goal: I want to print the content of "content", "url", "title" and so on (its for a result site of a search query.)

ishegg · Accepted Answer · 2017-09-14 13:53:13Z

You're iterating over the element's attributes. In your loop, the element value is in the $dat variable. In this example, I had to remove one foreach() loop because of the sample XML:

<?php
$data = simplexml_load_file("a.xml");
foreach($data->str as $dat) {
    foreach ($dat->attributes() as $a => $b) {
        echo $a,'="',$b,'"';
        if ($b=='title') {
            echo "right one";
        }
    }
    echo " -> ".$dat."<br>";
}

/* result */
name="segment" -> 20170913064727
name="digest" -> 427522d5ceb605f87755c909deac698a
name="title" right one -> AMS Site

If you want to put the title when you find it in a variable, use the same variable inside the loop:

<?php
$data = simplexml_load_file("a.xml");
foreach($data->str as $dat) {
    foreach ($dat->attributes() as $a => $b) {
        if ($b=='title') {
            $title = $dat;
            break;
        }
    }
}
echo "Title: ".$dat; // Title: AMS Site

iainn · Accepted Answer · 2017-09-14 14:00:00Z

1

Based on the structure of your XML, it might be easier to just loop over the <str> elements and build up an array mapping the name attribute to the content.

$dat = simplexml_load_string($xml);

$attributes = [];

foreach ($dat->str as $str) { 
  $attributes[(string) $str['name']] = (string) $str;
}

You could then access the "title" element under $attributes['title'] (or assign it to your $ergTitle variable, etc).

answered Sep 14, 2017 at 14:00

iainn

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