PHP Functions Essential Reference

rad2deg

double rad2deg(double radians) 

Converts a value in radians to its counterpart in degrees.

Returns:

Floating-point value in degrees

Description:

Returns the number of degrees represented by the radians parameter.

Version:

PHP 3 since 3.0.4, PHP 4

See also:

deg2rad() 

Example:

Convert radians to degrees

$arc_rad = pi() / 2; // pi/2 is one quarter of a circle $arc_deg = rad2deg($arc_rad); echo "$arc_rad radians is equivalent to $arc_deg degrees";