Error caused by PHP 5.2.14
 

My server host recently upgraded to PHP 5.2.14 temporarily while troubleshooting a MySQL problem, and during this time, all vB pages gave this error:

Quote:
Warning: require_once(DIR/includes/functions_log_error.php) [function.require-once]: failed to open stream: No such file or directory in /home/virtual/site103/fst/var/www/html/forums/includes/class_core.php on line 3247

Fatal error: require_once() [function.require]: Failed opening required 'DIR/includes/functions_log_error.php' (include_path='.:/home/virtual/site103/fst/usr/local/share/pear:/usr/share/pear') in /home/virtual/site103/fst/var/www/html/forums/includes/class_core.php on line 3247

My question is, why exactly did this error occur, and what can be done to fix it? I run vB 3.6.12 Patch Level 1 (for various reasons I didn't get around to Lv2 yet). Would upgrading to 3.6.12 Lv2 solve this problem, or would I need to outright upgrade to 3.7 or 3.8?

Our current PHP version is 5.2.12, but the server admin warned that we may be permanently upgrading sometime within the next year or two, and thus this is a problem I need to address. I'm assuming it's an issue with some PHP functions being changed in newer versions that older vB versions aren't written for, but solid answers would be very nice.

Thanks in advance for any replies!