This is a joomla file. I just copied core.php to tht directory and it start working. But my problem is different.
Here is what I had posted on joomla fourm. Hoping someone will help me out.
Warning: require_once(/home/xxx/public_html/libraries/phputf8/mbstring/core.php) [function.require-once]: failed to open stream: No such file or directory in /home/xxx/public_html/libraries/phputf8/utf8.php on line 62
Here is the problem.
I was hosting 24 joomla sites with one of the host. While chating with their support, they misunderstood and deleted my entire reseller package. When it was backed up, none of my 24 joomla and 5 other php sites were working. When they restored, I got my sites but none of them were working.
When I went to /libraries/phputf8/mbstring, I saw core.php was missing. I manually copied that file from my own backups and sites start working.
I changed the host, got most advanced hosting options, everything seems to be working.
But this not the end of the story. It worked for few days.
Just got a call from my client and he reported that his sites are down. Again, core.php gone missing from 10 of the joomla sites. Some of the sites are on 1.5.22 and some of them are on 1.5.9 to 1.5.18.
Let me know if anyone encountered the same problem and what is the fix.