Write a PHP script to get the first word of a sentence

PHP is a server scripting language, and It is a powerful tool for making interactive and dynamic Web-pages. I have used WampServer 2.2 for following example..

<?php
$str = 'TechStudy - The Complete Debugging Solution';
$arr = explode(' ',trim($str));
echo $arr[0]."\n";
?>

Result:

TechStudy