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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 ( callback 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

如果成功则返回 `TRUE`，失败则返回 `FALSE`。

## 范例

例 1. register_tick_function() example

`<?php // 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); ?>`

## 注释

警告
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.

## 参见

declare
unregister_tick_function()

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