Causes of php memory overflow

What should I do if the php memory overflows?

There are many reasons for memory overflow, the following are common ones:

1. The amount of data loaded in the memory is a bit large, which is larger than reading multiple text type data. The file log is more than 50M.

2. There is a reference to the object in the collection class, which is not cleared after use.

3. There is an infinite loop in the code or the loop generates too many duplicate object entities

4. PHP configuration parameters are too small

Summary:

Don’t panic once the memory overflows, analyze the reasons. What needs to be noted is to find a way to process the array in batches, divide and conquer, and destroy (unset) the used variables in time. Generally, overflow problems will not occur.

In order to save PHP program memory consumption, we should reduce the use of static variables as much as possible. When data reuse is needed, you can consider using references (&). Another point is: after the database operation is completed, the connection must be closed immediately; after an object is used, the destructor (__destruct()) must be called promptly

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