PHP Functions Essential Reference

Tick Functions

A tick function is a normal function or method that has been registered with register_tick_function(). The function can either be a built-in function or a user-defined function. Methods should be registered using array ($object,'method_name') syntax, as in the following examples:

<?php 
// Register a built-in function 
register_tick_function ('flush'); 

// Register a user-defined function 
function say_hi () {
   echo 'Hi!<br />'; 
} 
register_tick_function ('say_hi'); 

// Register a method 
class foo {
   // Empty constructor to avoid trouble with older versions of PHP 
   function foo (){} 

   function test () {
      echo "test<br />"; 
   } 
} 
$f = new foo (); 
register_tick_function (array ($f, 'test')); 
?> 

At the time a function (or method) is registered, ...