Excuse me, there is a line of code to set the php.ini file in the apache configuration file, as shown below. Why can it run without removing the "#" sign in front of PHPIniDir? I installed this using wamp, and then I watched the video on configuring apache separately. It said that the "#" must be removed.
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Here is the loading path of the PHP configuration file specified by APACHE. If commented out, PHP will load the configuration file in the following order.
PHPIniDir (Apache 2 module only)
Registry key: HKEY_LOCAL_MACHINE—SOFTWARE—PHPIniFilePath
Environment variable:%PHPRC%
PHP5 directory (for CLI), or web server directory (for SAPI modules)
Windows directory (C:windows or C:winnt)
So if it is Apache + PHP5, you can use PHPIniDir to specify the path to the php5 configuration file php.ini.