php man page for proc_nice

PROC_NICE(3)								 1							      PROC_NICE(3)

proc_nice - Change the priority of the current process

SYNOPSIS
       bool proc_nice (int  $increment)

DESCRIPTION
       proc_nice(3) changes the priority of the current process by the amount specified in $increment. A positive $increment will lower the prior-
       ity of the current process, whereas a negative $increment will raise the priority.

       proc_nice(3) is not related to proc_open(3) and its associated functions in any way.

PARAMETERS
	      o $increment
		- The increment value of the priority change.

RETURN VALUES
	Returns TRUE on success or FALSE on failure. If an error occurs, like the user lacks permission to change the priority, an error of  level
       E_WARNING is also generated.

NOTES
       Note

	      Availability

	      proc_nice(3) will only exist if your system has 'nice' capabilities. 'nice' conforms to: SVr4, SVID EXT, AT&T, X/OPEN, BSD 4.3. This
	      means that proc_nice(3) is not available on Windows.

PHP Documentation Group 													      PROC_NICE(3)