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In fact, if you're looking to use pcntl_setpriority() to prioritize your process (a tool or a daemon or what-not), I wouldn't recomend using setpriority at all, but renice it instead. Let the system manage priorities and you'll end up with the results you were looking for.
Simple usage example of `pcntl_setpriority ()`. The pcntl_setpriority function in PHP is used to modify the priority of any process. It allows for adjusting the scheduling priority of a process, which determines how much CPU time it receives relative to other processes.
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.
Execute pcntl_setpriority Online. Info and examples on pcntl_setpriority PHP Function from Process Control - Process Control Extensions
Description The pcntl_setpriority of PCNTL for PHP changes the priority of any process.
pcntl_setpriority Supported Versions: PHP 5, PHP 7, PHP 8 Change the priority of any process
pcntl_setpriority () sets the priority of pid to priority. If pid is not specified, the pid of the current process is used. 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.
