Function handling 函数
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register_tick_function

(PHP 4 >= 4.0.3, PHP 5)

register_tick_function — Register a function for execution on each tick

说明

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

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

参数

function

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

arg

...

返回值

成功时返回 TRUE， 或者在失败时返回 FALSE.

范例

Example #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);
?>

更新日志

版本 说明
5.3.0 Ticks are now supported on threaded web server modules.

注释

Warning

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

参见

Function handling 函数
在线手册：中文 英文
PHP手册
PHP手册 - N: Register a function for execution on each tick

用户评论:

rob dot eyre at gmail dot com (22-Jul-2011 01:19)

It looks like register_tick_function() can accept an anonymous function, but unregister_tick_function() cannot

Jeremy (21-Jun-2007 07:03)

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.