Setting a function equal a variable?

Question

I have a PHP function and I want it to equal a variable. Here is the code:

Answer 1

You can't make a function equal a variable, but how about a variable that equals a function?

$ItsaFunction = function() {
    //Code goes here
};

You could also do

function ItsaFunction() {
    //Code goes here
}

$ItsaFunction = ItsaFunction(); 

Answer 2

If I understand what to mean you want to check if there is a match in variables.

<?php  

 $letter = 'a';
 $word = 'a';

 function ItsaFunction($first, $sec){

if($first == $sec){

echo 'match';

}else{
//do something
}

ItsaFunction($letter,$word);

}
?>

Answer 3

function foo() {
    echo "In foo()<br />\n";
}

$func = 'foo';
$func();        // This calls foo()