deg2rad — Converts a value in degrees to its radian
float degrees: Degrees to
Radian value of the given degrees
Calculates the equivalent value of radians based on the
specified argument, in degrees.
PHP 3 since 3.0.4, PHP 4
Example 672. Calculate the
radians for a given value in degrees
$deg = 180.0;
$rad = deg2rad($deg);
echo "1/2 of a circle is $deg degrees or also $rad radians\n";
PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing
(Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch).
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