pcntl_setpriority
(PHP 5)
pcntl_setpriority — Change the priority of any process
說明
bool pcntl_setpriority
( int $priority
[, int $pid
[, int $process_identifier
]] )
pcntl_setpriority() sets the priority of pid .
參數
- priority
-
priority is generally a value in the range -20 to 20. The default priority is 0 while a lower numerical value causes more favorable scheduling. Because priority levels can differ between system types and kernel versions, please see your system's setpriority(2) man page for specific details.
- pid
-
If not specified, the pid of the current process is used.
- process_identifier
-
One of PRIO_PGRP, PRIO_USER or PRIO_PROCESS.
Return值
如果成功則回傳 TRUE，失敗則回傳 FALSE。