Never use deg2rad() in loops, use $rad = ($deg * M_PI / 180) instead which is faster!
deg2rad
(PHP 4, PHP 5)
deg2rad — Converts the number in degrees to the radian equivalent
Description
float deg2rad ( float $number )
This function converts number from degrees to the radian equivalent.
Parameters
- number
-
Angular value in degrees
Return Values
The radian equivalent of number
Examples
Example #1 deg2rad() example
<?php
echo deg2rad(45); // 0.785398163397
var_dump(deg2rad(45) === M_PI_4); // bool(true)
?>
See Also
- rad2deg() - Converts the radian number to the equivalent number in degrees
User Contributed Notes
deg2rad
deg2rad
christian dot ubu at NOSPAMHERE dot gmail dot com
13-Mar-2009 03:18
13-Mar-2009 03:18
john dot navratil at sbcglobal dot net
11-Feb-2007 03:32
11-Feb-2007 03:32
This does a simple scaling with the results that deg2rad(720) is 4PI. For navigation purposes you may wish to mod the results with 2PI.