PHP connection PostgreSQL error call to undefined function PG_ connect()

Use PHP to connect PostgreSQL, Call to undefined function pg_connect();
‘PDOException’ with message ‘could not find driver’ with message ‘could not find driver’
Testing environment:
First, the extension=php_pdo_pgsql.dll and extension=php_pgsql.dll extensions are on, but not working.
Then, add \PostgreSQL\bin to the environment variable, which still doesn’t work.
Then, putting \PostgreSQL\bin\libpq.dll into System32 has no effect.
Finally, change libpq.dll from \ PHP \php5.*\ into \apache*\bin to solve the problem.

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