PHP包含pgsql和pgsql_pdo驱动程序libpq.dll所需的dll ...
将PHP二进制路径添加到系统路径或将其拷贝到Windows \system32中。 linux依赖关系是自动安装的。

The PHP contains a dll required by pgsql and pgsql_pdo driver libpq.dll... Add PHP binary path to system path or copy de DLL into Windows\system32. On linux dependency are installed automatically.