ReflectionFunction::getClosure()

(PHP 5 >= 5.4.0, PHP 7)

Returns a dynamically created closure for the function

说明

publicReflectionFunction::getClosure(void): Closure

Warning

本函数还未编写文档，仅有参数列表。

参数

此函数没有参数。

返回值

ReturnsClosure.ReturnsNULLin case of an error.

If you have a callback that is going to be invoked often, you can use this method (and the related method for ReflectProperty) to get a closure that will execute at near native speed.
Some benchmark comparisons with php 5.4.22 on ubuntu:
[function call]   [time]   [%slower]
function():     0.09527   0%
Reflection::Closure: 0.09729   2%
$string():      0.102641   8%
Reflection:     0.197122  107%
call_user_func:   0.214045  125%
[method call]    [time] [% slower] [%vs func]
->method():     0.103611  0%    9%
Reflection::Closure: 0.1043   1%    9%
$string():      0.109885  6%   15%
Reflection:     0.20451  97%   115%
call_user_func:   0.219205 112%   130%