PHP manages freeing all resources. Users does not required to free file
handle resource, database resources, memory, etc, unless programmer need
to free resource during script execution.
(All resources are released after script execution)
PHP4 also have reference count feature. For example, memory for variables
is shared when it assigned to other variable. If contents has been
changed, PHP4 allocate new memory for it.
For example, programmer does not have to use pass by reference for large
parameters for better performance with PHP4.
It would be a nice section for new PHP users, if there is "Resource
Handling" section or like. Explanation about reference count feature
in PHP4 would be very helpful to write better PHP4 scripts also.
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