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pcntl_setpriority> <pcntl_fork
[edit] Last updated: Fri, 22 Jul 2011

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(PHP 5)

pcntl_getpriorityGet the priority of any process


int pcntl_getpriority ([ int $pid = getmypid() [, int $process_identifier = PRIO_PROCESS ]] )

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.



If not specified, the pid of the current process is used.



Return Values

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, such as 0 or "". Please read the section on Booleans for more information. Use the === operator for testing the return value of this function.

See Also

add a note add a note User Contributed Notes pcntl_getpriority
jonathan at jcdesigns dot com 15-May-2008 09:12
This function is ideal for checking if a given process is running, I have seen solutions that involve running the system utilites like PS and parsing the answer, which should work fine, but this allows you to check a given PID with a single call

function CheckPID( $PID )
        // Check if the passed in PID represents a vlaid process in the system
        // Returns true if it does
        // Turn off non-fatal runtime warning for a moment as we know we
        // will get one if the PID does not represent a valid process
    $oldErrorLevel = error_reporting(0);
    error_reporting( $oldErrorLevel & ~E_WARNING );
    $res = pcntl_getpriority($PID);
    error_reporting( $oldErrorLevel);
    return ! ( $res === false);

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