PHP Conference China 2020

安装

Support for this functions are not enabled by default. To enable System V semaphore support compile PHP with the option --enable-sysvsem. To enable the System V shared memory support compile PHP with the option --enable-sysvshm. To enable the System V messages support compile PHP with the option --enable-sysvmsg.

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sparcbr at gmail dot com
5 months ago
It should be mentioned that depending on the system, an module can be available.

On CentOS I just ran:
sudo yum install php73-php-sysvsem

then reload:
sudo service php-fpm reload (or apache, depending on your case)

and semaphore functions are now available.
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