Test if PHP variable is anonymous function

Question

I am looking for a way to test if a variable is an anonymous function/callback. Using the PHP.net example:

$greet = function($name)
{
    printf("Hello %s\r\n", $name);
};

You could call it with:

$greet('hi');

But what if $greet could be some other variable type and you only want to execute the callback if it's set to a function? Something like:

is_func($greet);
is_callback($greet);
is_callable($greet);

Am I missing something in the documentation?

sybear · Accepted Answer · 2014-05-26 20:54:19Z

3

is_callable($greet) will do that.

Also:

($greet instanceof Closure) might work.

answered May 26, 2014 at 20:54

sybear

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1 Comment

ha, dammit. of course, I use it in my own example. did not see it linked in the docs for anon functions. must've missed it. thanks!