Hi, I have been getting this error with email piping for WHMCS. The piping itself works, but will throw this error message back to the sender. I wasn't sure if this was related to cPanel or Litespeed, but cPanel forums sent me here. PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/extensions/no-debug-non-zts-20060613/mysql.so' - /usr/lib/php/extensions/no-debug-non-zts-20060613/mysql.so: undefined symbol: PL_perl_destruct_level in Unknown on line 0 I'm not 100% sure where to go from here with this. Some more details: Code: grep extension /usr/local/lib/php.ini ; dynamically loaded extension (either a PHP extension or a Zend extension), ; you may only use these constants *after* the line that loads the extension. ; leading '/'. You must also specify the file extension being used including ; Directory in which the loadable extensions (modules) reside. ;extension_dir = "/usr/local/lib/php/extensions/no-debug-non-zts-20090626" extension="eaccelerator.so" zend_extension="/usr/local/IonCube/ioncube_loader_lin_5.3.so" extension = "/usr/lib/php/extensions/no-debug-non-zts-20060613/mysql.so" ; If you wish to have an extension loaded automatically, use the following ; needs to go here. Specify the location of the extension with the ; extension_dir directive above. ; dictionary files. Include the base filename, but not the file extension. zend_extension="/usr/local/Zend/lib/Guard-5.5.0/php-5.3.x/ZendGuardLoader.so" Code: no-debug-non-zts-20060613]$ ls -l total 2536 -rwxr-xr-x 1 root root 229593 Mar 9 21:50 mysql.so -rwxr-xr-x 1 root root 112066 Mar 1 19:35 pdo.a -rwxr-xr-x 1 root root 29756 Mar 1 19:35 pdo_mysql.a -rwxr-xr-x 1 root root 34717 Mar 1 19:35 pdo_mysql.so -rwxr-xr-x 1 root root 114417 Mar 1 19:35 pdo.so -rwxr-xr-x 1 root root 579024 Mar 1 19:35 pdo_sqlite.a -rwxr-xr-x 1 root root 519754 Mar 1 19:35 pdo_sqlite.so -rwxr-xr-x 1 root root 481176 Mar 1 19:35 sqlite.a -rwxr-xr-x 1 root root 447539 Mar 1 19:35 sqlite.so At first I was getting an error stating that mysql.so wasn't there. So I cp'ed it from /usr/local/lib... to /usr/lib/... Now I'm getting this error. I'm not 100% sure that copying it was the correct thing to do, but I found a similar thread on WHT and that was their solution. I'm running: WHM 11.30.6 centOS 5.7 32bit LiteSpeed 4.1.11 The first problem seemed to be that rebuilding php from the litespeed admin panel didn't add mysql.so, so that's why I copied it the first time, then I think I recompiled it or something. I don't recall as it's been a few weeks since I could get back on this issue. Any help would be greatly appreciated. I also have some client sites running on the server, so I need to be careful rebuilding and breaking php sites.