Something like a callback delegate function in php

Question

I would like to implement something similar to a c# delegate method in PHP. A quick word to explain what I\'m trying to do overall: I am trying to implement some asynchron

Answer 1

How do you feel about using the Observer pattern? If not, you can implement a true callback this way:

// This function uses a callback function. 
function doIt($callback) 
{ 
    $data = "this is my data";
    $callback($data); 
} 


// This is a sample callback function for doIt(). 
function myCallback($data) 
{ 
    print 'Data is: ' .  $data .  "\n"; 
} 


// Call doIt() and pass our sample callback function's name. 
doIt('myCallback'); 

Displays: Data is: this is my data