问题描述
我很高兴看到 php 中的匿名函数,这让您声明的变量比使用 create_function.现在我想知道我是否有一个传递变量的函数,我如何检查它以确定它是否是一个函数?还没有 is_function() 函数,当我对作为函数的变量进行 var_dump 时::
I was pretty excited to read about anonymous functions in php, which let you declare a variable that is function easier than you could do with create_function. Now I am wondering if I have a function that is passed a variable, how can I check it to determine if it is a function? There is no is_function() function yet, and when I do a var_dump of a variable that is a function::
$func = function(){
echo 'asdf';
};
var_dump($func);
我明白了:
object(Closure)#8 (0) { }
关于如何检查这是否是一个函数的任何想法?
Any thoughts on how to check if this is a function?
推荐答案
使用 is_callable
判断一个给定的变量是否是一个函数.例如:
Use is_callable
to determine whether a given variable is a function. For example:
$func = function()
{
echo 'asdf';
};
if( is_callable( $func ) )
{
// Will be true.
}
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