Access children xml elements through php [duplicate]

This question already has an answer here:

• How do you parse and process HTML/XML in PHP? 33 answers

Greetings Everybody & thanks in advance for your answers. So, my difficulty is this, i found a nice tutorial about a restful web service and i can not manage to modify it to my needs.

The below sample code works like a charm

 function get_price($find) {
    $products = array(
        "test" => 293,
        "test2" => 348,
        "test3" => 267
    );

    foreach ($products as $product => $price) {
        if ($product == $find) {
            return $price;
            break;
        }}}

The $price return runs correctly for each of the above elements of the array which i choose through a simple html form.

Now my code

    function get_tickets($find){
    $xml = simplexml_load_file("products.xml");  

    // Here i want to return some of the xml's elements
   }

and the included xml file

<products>
    <company>
        <name>test</name>
        <tel>test</tel>
    </company>
    <products>
        <product id="1">
            <name>test</name>
            <value>test</value>
            <color>test</color>
        </product>
    </products>
</products>

I want to be able to access all the elements of the xml like the first sample code. Thank you.