会出现下面的问题，怎么修改?请教大神，我的php版本是5.4.45
SQLSTATE[IMSSP]: This extension requires the ODBC Driver 11 for SQL Server to communicate with SQL Server. Access the following URL to download the ODBC Driver 11 for SQL Server ODBC driver for x86: http://go.microsoft.com/fwlink/?LinkId=163712
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