Why is the manually compiled php-redis module that is not displayed in phpinfo() after installing PHP using brew on mac M2?

After installing PHP with Brew on Mac M2 system, manually compile and install the php-redis extension but cannot be displayed in phpinfo()

On macOS M2 system, after using Homebrew to install PHP, some users encountered problems when manually compiling and installing the php-redis extension: the command line can use the redis extension normally, the php -m command can also display redis, php -r "if (new Redis() == true){ echo "\r\n OK \r\n"; }" command also returns OK, but phpinfo() cannot display redis-related information.

The php.ini file path is confirmed to be /opt/homebrew/etc/php/7.3/php.ini , and the file is loaded through php -i | grep Loaded , and extension=redis configuration has been added to it.

The root cause of the problem may be the difference between the PHP configuration file and the CLI environment, and the configuration of PHP-FPM. The following provide troubleshooting steps:

1. Verify the consistency of PHP version: Use php -v to view the command line PHP version, and then access phpinfo() page through the browser to confirm whether the PHP version used by the web server is consistent with the command line version. Version inconsistency is a common reason.

2. Check PHP-FPM configuration: If you use PHP-FPM, you need to check its configuration file (usually located in /opt/homebrew/etc/php/7.3/php-fpm.d/ directory) to make sure it loads the correct php.ini file and that the file contains extension=redis configuration.

3. Restart the web server: After modifying the configuration file, be sure to restart the web server for the changes to take effect (for example, restart Nginx using sudo nginx -s reload ).

4. Confirm the extension file path: Check whether the extension_dir setting in the php.ini file is correct, and make sure that the redis.so file is located in this directory. Use php -i | grep extension_dir to view the current extension directory.

5. Permissions issue: Make sure the web server has permission to read the redis.so file and php.ini file. Adjust file permissions if necessary.

6. Compilation options: Confirm that the PHP version used when compiling php-redis is the same as the PHP version of the system, and the compilation parameters are correct.

If the above steps still fail to resolve the problem, it is recommended to check the system log and PHP error log to obtain more detailed error information for further troubleshooting. Check each step carefully to make sure all configurations are correct.

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