"Unable to load dynamic library" on WordPress blogs error log?

I am getting the following massage in the error log files of my WordPress blogs:

[10-Oct-2010 04:37:43] PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-zts-20060613/pdo.so' - /usr/local/lib/php/extensions/no-debug-zts-20060613/pdo.so: undefined symbol: compiler_globals_id in Unknown on line 0
[10-Oct-2010 04:37:43] PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-zts-20060613/pdo_sqlite.so'开发者_JAVA技巧 - /usr/local/lib/php/extensions/no-debug-zts-20060613/pdo_sqlite.so: undefined symbol: php_pdo_register_driver in Unknown on line 0

What does it mean?

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The php configuration is broken or you deleted the php.ini file. Check your php install, check php.ini, or ask your webhost.