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Is it a good practice to unset the variables that you used in a class? Or its an optional?
If its a good practice what is the benefit of using the unset function?
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It seems that $a = null is a bit faster than its unset() counterpart: updating a symbol table entry appears to be faster than removing it.
The unset() function in PHP resets any variable. If unset() is called inside a user-defined function, it unsets the local variables. If a user wants to unset the global variable inside the function, then he/she has to use $GLOBALS array to do so. The unset() function has no return value.
PHP | unset() Function The unset() function is an inbuilt function in PHP which is used to unset a specified variable.
if you see in php documentation there are not available directly remove multiple keys from php array. But we will create our own php custom function and remove all keys by given array value. In this example i created custom function as array_except().
You really don't need to worry about cleaning up your variable declarations in PHP, its garbage collection takes care of all of that for you. Your __destruct() methods are primarily for things like closing persistent connections.
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