php中的ignore
欢迎进入Linux社区论坛,与200万技术人员互动交流 >>进入 用php中的ignore_user_abort函数实现计划任务: 用php的ignore_user_abort函数可以帮助我们实现像linux中的crontab一样的计划任务,下面看一下是如何来实现的. 语法: 手册上的说明 Description int ign
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用php中的ignore_user_abort函数实现计划任务:
用php的ignore_user_abort函数可以帮助我们实现像linux中的crontab一样的计划任务,下面看一下是如何来实现的.
语法:
手册上的说明
Description
int ignore_user_abort ([ bool $setting ] )
Sets whether a client disconnect should cause a script to be aborted.
也就是说无论客户端是否关闭浏览器,下面的程序都会执行.
参数说明:
Parameters
setting
If not set, the function will only return the current setting.
这个函数接受一个参数,来决定是否启用ignore_user_abort的功能.
返回值:
Return Values
Returns the previous setting, as a boolean.
这里说返回前一次的设置,并且是bool值得,经过我的测试,这个说法是不对的,返回的明明是int型的,不相信的话大家可以写一个php文件来测试下.
实现定时器的功能还需借助set_time_limit函数,通过set_time_limit(0)可以设置程序的执行时间为无限制,php默认的执行时间是30秒,通过set_time_limit(0)可以让程序无限制的执行下去.在程序执行之前加上ignore_user_abort(1)和set_time_limit(0)即可以了,看下面的例子.
ignore_user_abort(); // run script in background
set_time_limit(0); // run script forever
$interval=60*15; // do every 15 minutes...
do{
// add the script that has to be ran every 15 minutes here
// ...
sleep($interval); // wait 15 minutes
}while(true);
?>

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