PHP - register_tick_function()

The register_tick_function() function can register a function for execution on each tick.

Syntax

bool register_tick_function( callable $function [, mixed $arg [, mixed $... ]] )

The register_tick_function() can register a function named by func to be executed when a tick is called. Also, we may pass an array consisting of an object and method as the func. This function can return true on success or false on failure.

Example

<?php
   function myfunc($param1, $param2) {
      echo "In first tick function with params $param1 $param2\n";
   }

   function myfunc2($param1, $param2, $param3) {
      echo "In second tick function with params $param1 $param2 $param3\n";
   }

   function myfunc3($param1) {
      echo "In third tick function with params $param1\n";
   }

   register_tick_function("myfunc", "hello", "world");
   register_tick_function("myfunc2", "how", "are", "you?");
   register_tick_function("myfunc3", "goodbye!");

   declare(ticks=10);
   for($i = 0; $i < 20; ++$i) {
      echo "Hello\n";
   }
?>

Output

Hello
Hello
Hello
Hello
Hello
Hello
Hello
Hello
Hello
In first tick function with params hello world
In second tick function with params how are you?
In third tick function with params goodbye!
Hello
Hello
Hello
Hello
Hello
Hello
Hello
Hello
Hello
Hello
In first tick function with params hello world
In second tick function with params how are you?
In third tick function with params goodbye!
Hello

Example

<?php
   // A function that records the time when it is called
   function profile($dump = FALSE) {
      static $profile;

      // Return the times stored in profile, then erase it
      if($dump) {
         $temp = $profile;
         unset ($profile);
         return ($temp);
      }
      $profile[] = microtime ();
   }

   // Set up a tick handler
   register_tick_function("profile");

   // Initialize the function before the declare block
   profile();

   // Run a block of code, throw a tick every 2nd statement
   declare(ticks=2) {
      for($x = 1; $x < 10; ++$x) {
         echo similar_text(md5($x), md5($x*$x)), "\n";
      }
   }
   
   // Display the data stored in the profiler
   print_r(profile(TRUE));
?>

Output

32
7
12
7
7
7
11
7
7
Array
(
    [0] => 0.19704000 1597409126
    [1] => 0.19712700 1597409126
    [2] => 0.19714900 1597409126
    [3] => 0.19716800 1597409126
    [4] => 0.19718400 1597409126
    [5] => 0.19719700 1597409126
    [6] => 0.19721400 1597409126
    [7] => 0.19723000 1597409126
    [8] => 0.19724400 1597409126
    [9] => 0.19725800 1597409126
)