PHP load XML and check for match

Question

I have an XML file that I need to loop through and check for a string match. Not sure why the code below isn't working, i.e. does not return "true".

XML

<AUTHORIZED>
<USER>janedoe</USER>
<USER>sallysmith</USER>
<USER>walterwilliams</USER>
<USER>jennyjones</USER>
</AUTHORIZED>

PHP

<?php

    $user = 'janedoe';

    //Load xml file
    if (file_exists('users.xml')) {
        $authUsers = simplexml_load_file('users.xml');
    } else {
        echo 'Could not find list of authorized users!';
    }

    //Check for approved user
    if(in_array($user, $authUsers)){
        $approvedUser = 'true';
    } else {
        $approvedUser = 'false';
    }

    echo $approvedUser;

?>

Please do a var_dump on $approvedUser. I don't think it is structured like you think it is. — Jonathan M
– Jonathan M, Commented Aug 12, 2016 at 19:50

Dekel · Accepted Answer · 2016-08-12 19:53:44Z

2

The function simplexml_load_file returns a SimpleXMLElement and not an Array, so you can't use the in_array function to do this.

What you can do, is take the value if $authUsers->USER (which is also a SimpleXMLElement), convert it to array, and then check it:

$str = "<AUTHORIZED>
<USER>janedoe</USER>
<USER>sallysmith</USER>
<USER>walterwilliams</USER>
<USER>jennyjones</USER>
</AUTHORIZED>";


$user = 'janedoe';

$authUsers = simplexml_load_string($str);
var_dump((array) $authUsers->USER);

//Check for approved user
if(in_array($user, (array) $authUsers->USER)){
    $approvedUser = 'true';
} else {
    $approvedUser = 'false';
}

answered Aug 12, 2016 at 19:53

Dekel

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3 Comments

PixelPaul Over a year ago

Thank you, this did what I needed.

Dekel Over a year ago

You are welcome. A vote up for the answer will also be appreciated :)

PixelPaul Over a year ago

Sorry about that. Done :)

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