PHP 7.2.0 Beta 3 Released

register_tick_function

(PHP 4 >= 4.0.3, PHP 5)

register_tick_functionRegister a function for execution on each tick

Opis

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

Registers the given function to be executed when a tick is called.

Parametry

function

The function name as a string, or an array consisting of an object and a method.

arg

...

Zwracane wartości

Zwraca TRUE w przypadku powodzenia, FALSE w przypadku błędu.

Przykłady

Przykład #1 register_tick_function() example

<?php
declare(ticks=1);

// using a function as the callback
register_tick_function('my_function'true);

// using an object->method
$object = new my_class();
register_tick_function(array(&$object'my_method'), true);
?>

Rejestr zmian

Wersja Opis
5.3.0 Ticks are now supported on threaded web server modules.

Notatki

Ostrzeżenie

register_tick_function() should not be used with threaded web server modules with PHP 5.2 or lower.

Zobacz też:

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User Contributed Notes 5 notes

up
2
Peter Featherstone
2 months ago
Due to an implementation bug, the declare(ticks=1) directive leaked into different compilation units prior to PHP 7.0. This is not how declare() directives, which are per-file or per-scope, are supposed to work.

Therefore there are different implementations between PHP 5.6 and the correct implementation has been added in PHP 7.0. This means the below script will return different results

#index.php

<?php

declare(ticks=1);
$count = 0;

register_tick_function('ticker');
function
ticker() {
  global
$count;
 
$count++;
}

?>

#inc.php

<?php

$baz
= "baz";
$qux = "qux";

?>

Running php index.php in the terminal gives:

    PHP 5.6 - 7
    PHP 7.0 - 5
up
2
Carlos Granados
7 months ago
A working example with variable input for validating the asymptotic analysis of your algorithm:

<?php

$n
= 1000; // Size of your input

declare(ticks=1);

class
Counter {
    private
$counter = 0;

    public function
increase()
    {
       
$this->counter++;
    }
   
    public function print()
    {
        return
$this->counter;   
    }
}

$obj = new Counter;

register_tick_function([&$obj, 'increase'], true);

for (
$i = 0; $i < 100; $i++)
{
   
$a = 3;
}

// unregister_tick_function([&$obj, 'increase']);
// Not sure how to de-register, you can use static methods and members in the Counter instead.

var_dump("Number of basic low level operations: " . $obj->print());

?>
up
-8
Jeremy
10 years ago
I tried the following on an IIS 6/PHP 5 machine:

<?php
   
    set_time_limit
(0);
   
    function
profiler($return = false)
    {
        static
$m = 0;
        if(
$return) return $m . " bytes";
        if((
$mem = memory_get_usage()) > $m) $m = $mem;
    }
   
   
register_tick_function('profiler');
    declare(
ticks = 1);
   
   
$numbers = array();
    for(
$i=0; $i<1000000; $i++)
    {
        print(
$i . "<br />");
    }
   
    print(
profiler(true));
   
?>

...and got the following errors:

1) PHP has encountered an Unhandled Exception Code -1073741674 at 0435EC5A
2) PHP has encountered an Access Violation at 02727891
3) PHP has encountered an Access Violation at 02727879
4) PHP has encountered an Access Violation at 00000000

So far the code hasn't crashed the web server, but like the warning says, "register_tick_function() should not be used with threaded web server modules. Ticks are not working in ZTS mode and may crash your web server."

Strangely enough, the code does execute successfully every once in a while.
up
-10
Ahmad Samiei
3 years ago
put in in your index to find where your code exited. find die o exit

function shutdown_find_exit()
{
var_dump($GLOBALS['dbg_stack']);
}
register_shutdown_function('shutdown_find_exit');
function write_dbg_stack()
{
$GLOBALS['dbg_stack'] = debug_backtrace();
}
register_tick_function('write_dbg_stack');
declare(ticks=1);
up
-14
rob dot eyre at gmail dot com
6 years ago
It looks like register_tick_function() can accept an anonymous function, but unregister_tick_function() cannot
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