(PHP 4 >= 4.3.0, PHP 5, PHP 7)
pcntl_alarm — 为锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷alarm锟斤拷锟斤拷锟脚猴拷
$seconds
) : int
锟斤拷锟斤拷一锟斤拷锟斤拷时锟斤拷锟斤拷锟斤拷指锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷谭锟斤拷锟揭伙拷锟�SIGALRM锟脚号★拷每锟轿讹拷
pcntl_alarm()锟侥碉拷锟矫讹拷锟斤拷取锟斤拷之前锟斤拷锟矫碉拷alarm锟脚号★拷
seconds
锟饺达拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟�seconds锟斤拷锟斤拷为0,锟斤拷锟斤拷锟结创锟斤拷alarm锟脚号★拷
锟斤拷锟斤拷锟较达拷alarm锟斤拷锟饺ｏ拷锟斤拷alarm锟脚号凤拷锟酵ｏ拷剩锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街懊伙拷锟絘larm锟斤拷锟饺ｏ拷锟斤拷注锟斤拷锟斤拷锟斤拷之前锟斤拷锟斤拷锟斤拷锟斤拷桑锟� 时锟斤拷锟斤拷0锟斤拷