Event driven programming in PHP - Introduction

PHP doesn't currently support events, although there are functions in PHP that have similar functionality in their implementation, like the xml_set_element_handler function for example.

It is quite tricky to fully incorporate events into PHP. The biggest challenge however is to provide sufficient abstraction that would make it simple(and viable) to use. Potentially forcing us to rethink our web application architecture.

Just to get everyone up to par, an event offers functionality that exposes certain occurances within an object. Enabling a developer to handle these occurances(onload, onclick, onkeydown etc).

Events as seen in Javascript

 
window.onload = function()
{
    alert("Welcome");
}
 
window.onclick = function()
{
    alert("You clicked");
}
 

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