php: error while loading shared libraries: libmysqlclient.so.18: cannot open shared object file: No such file or directory
From the Percona Server 5.5.36-34.0 Release Notes:
In order to comply with Linux distribution packaging standards Percona‘s version of libmysqlclient has been renamed to libperconaserver. The old name was conflicting with the upstream libmysqlclient. Except for packaging, libmysqlclient and libperconaserverclient of the same version do not have any differences. Users wishing to continue using libmysqlclient will have to install the corresponding package of their distribution, such as mysql-lib for CentOS and libmysqlclient18 for Ubuntu/Debian. Users wishing to build software against libperconaserverclient should install libperconaserverclient-dev package. An old version of Percona-built libmysqlclient will be available for download.
The solution is pretty easy; You simply need to symlink libperconaserver to libmysqlclient, and here's how it's done:
ln -s /usr/lib64/libperconaserverclient.so /usr/lib64/libmysqlclient.so ln -s /usr/lib64/libperconaserverclient.so.18 /usr/lib64/libmysqlclient.so.18(Note: for RHEL/CentoOS/CL 6 x86, replace /usr/lib64 with /usr/lib)
Finally, re-run EasyApache to compile PHP against the new libraries: