输入命令，php -i：
phpinfo()
PHP Version => 7.1.12
System => Windows NT DESKTOP-6UOJ7F2 10.0 build 16299 (Windows 10) AMD64
Build Date => Nov 23 2017 04:17:05
Compiler => MSVC14 (Visual C++ 2015)
Architecture => x64
Configure Command => cscript /nologo configure.js "--enable-snapshot-build" "--enable-debug-pack" "--disable-zts" "--with-pdo-oci=c:\php-snap-build\deps_aux\oracle\x64\instantclient_12_1\sdk,shared" "--with-oci8-12c=c:\php-snap-build\deps_aux\oracle\x64\instantclient_12_1\sdk,shared" "--enable-object-out-dir=../obj/" "--enable-com-dotnet=shared" "--with-mcrypt=static" "--without-analyzer" "--with-pgo"
Server API => Command Line Interface
Virtual Directory Support => disabled
Configuration File (php.ini) Path => C:\Windows
Loaded Configuration File => D:\software\SalamanderWnmp\php\php.ini
Scan this dir for additional .ini files => (none)
....
查看Loaded Configuration File项
然后看看你网页中Loaded Configuration File是否一样