问题
Is there an alternative to anonymous functions in versions of PHP previous to 5.3.0?
回答1:
There is create_function but it generally isn't recommended. If you're using OOP, you'd be better off defining a one-off private member to use with a callback instead.
回答2:
Yes, create_function()
回答3:
There are two choices.
First is to create a function, inside a function. Unfortunately, it will pollute the global namespace.
The second choice is to use create_function.
来源：https://stackoverflow.com/questions/3694620/anonymous-functions-pre-php-5-3-0