pcntl_alarm

(PHP 4 >= 4.3.0, PHP 5)

pcntl_alarm — Set an alarm clock for delivery of a signal

说明

int pcntl_alarm ( int $seconds )

Creates a timer that will send a SIGALRM signal to the process after the given number of seconds. Any call to pcntl_alarm() will cancel any previously set alarm.

参数

seconds: The number of seconds to wait. If seconds is zero, no new alarm is created.

返回值

Returns the time in seconds that any previously scheduled alarm had remaining before it was to be delivered, or 0 if there was no previously scheduled alarm.


	PHP5中文手册 PCNTL pcntl_exec PCNTL PHP Manual pcntl_alarm (PHP 4 >= 4.3.0, PHP 5) pcntl_alarm — Set an alarm clock for delivery of a signal 说明 int pcntl_alarm ( int `$seconds` ) Creates a timer that will send a `SIGALRM` signal to the process after the given number of seconds. Any call to pcntl_alarm() will cancel any previously set alarm. 参数 `seconds` The number of seconds to wait. If `seconds` is zero, no new alarm is created. 返回值 Returns the time in seconds that any previously scheduled alarm had remaining before it was to be delivered, or 0 if there was no previously scheduled alarm. PCNTL pcntl_exec PCNTL PHP Manual