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If you find that your nice, working closures break when you load your code to a hosted website, check for e Accelerator (e.g. Simple fixes include:* disabling e Accelerator and opcode caching* replacing e Accelerator with Zend's opcache* reverting to PHP 5.3Apparently, the e Accelerator project has solved this issue, but hosts move slowly so I recommend removing e Accelerator from the equation for now.When using anonymous functions as properties in Classes, note that there are three name scopes: one for constants, one for properties and one for methods.It's not until AFTER the function has been assigned to $fib that $fib can be used to call the function - but by then it's too late to pass its value to the function being created!Using a reference resolves the dilemma: when called, the anonymous function will use $fib's current value, which will be the anonymous function itself.At least, it will be if you don't reassign $fib to anything else between creating the function and calling it: Of course, that's true of any variable: if you don't want its value to change, don't change its value.All the usual scoping rules for variables still apply: a local variable in a function is a different variable from another one with the same name in another function: If you want to make a recursive closure, you will need to write this:$some_var1="1";$some_var2="2";function($param1, $param2) use ($some_var1, $some_var2)If you need to pass values by reference you should check out you're wondering if $some_var1 and $some_var2 are still visible by using the call_user_func, yes, they are available.Creating new lambda with function() ; expression creates new instance of its static variables.

But until the function has been created, $fib can't have it as a value!Best regards, Hardly a sensible implementation of the Fibonacci sequence, but that's not the point!The point is that the variable needs to be used by reference, not value.Consider the following example: That means, regular method invocations work like expected and like before.The anonymous function instead, must be retrieved into a variable first (just like a property) and can only then be invoked.

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