centos system, lnmp environment, I compiled and installed the memcached extension. There is an extension under php -m, but there is no such extension in phpinfo?
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You can try using the command line to see if phpinfo()is there. If not.
I am afraid that the ini of your cli and the ini of php-fpm are not the same.
If it still doesn’t work after you restart php-fpm, check if there are multiple php versions. The command line and web may use different php.
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