yum install php-devel.x86_64
yum install php-devel.x86_64
Maybe in the old version of the docker environment, when using Docker compose to start the container, you will encounter the following error: Error response from daemon: could not find an available, non-overlapping IPv4 address pool among the defaults to assign to the network This is actually this It is a symptom of running out of default-address-pools. In some environments, docker-compose will use the private network of Class B by default. The private IP of segment 172 has a range, from 172.16.0.0 to 172.31.255.255. That is to say, when we start a docker-compose Project, it will eat a private section of Class B, which is very heroic.
The full name of PSR is called "PHP Standards Recommendations" (PHP Standards Recommendations). A proposed specification developed by FIG (PHP Framework Interoperability Group), This group was initiated by some framework developers in php|tek in 2009, from the first 5 to more than 20 now. There are many numbers in the "PHP Standard Recommendations", each number represents a different specification.
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