当我想看到我的php版本时，使用命令“php -v”，会显示一些警告。 怎么解决？

When I want to see my php version, use the command php -v, there show some warnings. How to solve it?

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PHP Warning: PHP Startup: Unable to load dynamic library '/Applications/Server.app/Contents/ServerRoot/usr/lib/php/extensions/no-debug-non-zts-20121212/pdo_pgsql.so' - dlopen(/Applications/Server.app/Contents/ServerRoot/usr/lib/php/extensions/no-debug-non-zts-20121212/pdo_pgsql.so, 9): image not found in Unknown on line 0

PHP Warning: PHP Startup: Unable to load dynamic library '/Applications/Server.app/Contents/ServerRoot/usr/lib/php/extensions/no-debug-non-zts-20121212/pdo_pgsql.so' - dlopen(/Applications/Server.app/Contents/ServerRoot/usr/lib/php/extensions/no-debug-non-zts-20121212/pdo_pgsql.so, 9): image not found in Unknown on line 0

You have a php configuration file that try to loads the pdo_pgsql.so library, but the library isn't installed correctly.

You can either disable the library loading by removing the configuration directive loading it (you should have something like this:extension=pdo_pgsql.so) or install the pdo for php correctly.