How to unset a function definition just like we unset a variable?

Question

I want to define a function and unset it after its use just like we do with variables.

$a = \'something\';
unset($a);
echo $a; // outputs nothing
         


        

Answer 1

From this question:

You can use rename_function

and then redeclare the original function.
override_function may work too.

They are part of the Zend PHP Debugger, if that doesn't work then you can always try something like:

function function1(){
 echo "1";
}

function function2(){
 echo "2";
}

$i = "function2";
$i(); //  displays 2;