register_tick_function
(PHP 4 >= 4.0.3, PHP 5, PHP 7)
register_tick_function — Register a function for execution on each tick
说明
$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(& $object , 'my_method' ), true );
?> 更新日志
| 版本 | 说明 |
|---|---|
| 5.3.0 | Ticks are now supported on threaded web server modules. |
注释
register_tick_function() should not be used with threaded web server modules with PHP 5.2 or lower.
参见
- declare
- unregister_tick_function() - De-register a function for execution on each tick
用户评论:
[#1] Ahmad Samiei [2013-08-30 15:41:09]
put in in your index to find where your code exited. find die o exit
function shutdown_find_exit()
{
var_dump($GLOBALS['dbg_stack']);
}
register_shutdown_function('shutdown_find_exit');
function write_dbg_stack()
{
$GLOBALS['dbg_stack'] = debug_backtrace();
}
register_tick_function('write_dbg_stack');
declare(ticks=1);
[#2] rob dot eyre at gmail dot com [2011-07-22 05:19:29]
It looks like register_tick_function() can accept an anonymous function, but unregister_tick_function() cannot
[#3] Jeremy [2007-06-21 11:03:17]
I tried the following on an IIS 6/PHP 5 machine:
<?php
set_time_limit(0);
function profiler($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.