MySQL troubleshooting

This task describes a workaround for the case when a console using the MySQL database fails with message "Database extension 'mysqli' not found." This problem occurs on Red Hat Linux version 6.x when the following file is used:
/opt/buildforge/server/apache/lib/php/extensions/no-debug-non-zts-20090626
  1. Check for missing libraries and permissions.
    Use the ldd command. Example response:
     ldd: warning: you do not have execution permission for `./mysqli.so'
	linux-gate.so.1 =>  (0x00413000)
	libmysqlclient.so.15 =>  not found
	.............
	libssl.so.6 => not found
	libcrypto.so.6 =>  not found
  2. Do one of the following tasks so that the libmysqlclient.so.15 library can be found.
    • Append the full path of libmysqlclient.so.15 to LD_LIBRARY_PATH.
    • Copy libmysqlclient.so.15 to /usr/lib.
  3. Add links to older libraries.
    You need to add links to older libraries manually. Example:
    ln -s /usr/lib/libcrypto.so.1.0.0 /usr/lib/libcrypto.so.6
ln -s /usr/lib/libssl.so.1.0.0 /usr/lib/libssl.so.6
  4. Restart the console.
    A restart is required.