(PHP 5, PHP 7)
pcntl_getpriority — Get the priority of any process
pcntl_getpriority ([ int $pid = getmypid() [, int $process_identifier = PRIO_PROCESS ]] ) : int
pcntl_getpriority() gets the priority of pid. Because priority levels can differ between system types and kernel versions, please see your system's getpriority(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.
pcntl_getpriority() returns the priority of the process or false on error. A lower numerical value causes more favorable scheduling.
This function may return Boolean false, but may also return a non-Boolean value which evaluates to false. Please read the section on Booleans for more information. Use the === operator for testing the return value of this function.
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https://www.php.net/manual/en/function.pcntl-getpriority.php