php - How do i make Xpath search case insensitive

Question

I'm currently making a xpath search, I've got the the search working but I need to make it case insensitive. The xml file I'm using is 1.0 which from my research means I've got to use some thing called a translate function but I'm unsure of how to do this.

Here is my search file :

$holidayDoc = simplexml_load_file('holidays.xml');      

// fetch data from form
$txtSearch = $_GET['txtSearch'];

$qry = "//channel/item[contains(.,"$txtSearch")]";


$holidays = $holidayDoc->xpath($qry);   // do the xpath query 
// now loop through all the students

echo "Showing title search results for $txtSearch";

foreach ($holidays as $holiday) 
{

 echo "<p><a href="{$holiday->link}">{$holiday->title}</a></p>
    <p><small>$holiday->pubDate</small></p>";

Any help would be greatly appreciated thanks.

Answer 1

XPath 1.0 :

$qry = "//channel/item[contains(
 translate(., 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz'),  
 translate($search, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz'))]"

XPath 2.0 :

$qry = "//channel/item[lower-case(.) = lower-case($search)]"

Both replace all upper case to lower case.