Need to search a content which is in greek letters using strtoupper and strtolower
<p>I am currently working in a GREEK project. In that project all the contents are GREEK and in that i have a search functionality. Search process is good. But strtoupper() didn't convert the Greek language to upper case and strtolower() didn't convert the Greek language to lower case. </p>

<p>But for English language its working fine. Is there any possible way to convert the Greek letters to UPPER and LOWER case.</p>

<p>thanks</p>

<p>Fero</p>
