php脚本有多少内存？ 我可以在执行期间释放内存吗？

Question

Can php script get allowed memory size and also how much memory can be allocated? I know that it is possible to clean memory using unset. But I'll like to understand how to create php scripts that consume less memory as possibile.

Answer 1

unset will free the memory.

Though major memory consumption will be on the resources from io, db etc.

And for these tasks, it is very important to release the memory or free up the sources for further utilisation.

Also to note that while processing, the processed data will also have near similar usage. Hence freeing that after usage will also improve the use case.

To go more and more memory less, make functions pure as much as possible, where after execution of function, there is only output and no side effect. With this there will be less things in global memory space.