Convert angles to radians:
<?phpecho deg2rad("45") . "<br>";echo deg2rad("90") . "<br>";echo deg2rad("360");?>The deg2rad() function converts angle values to radians.
Tip: To convert radians to degrees, check out the rad2deg() function.
deg2rad( number );
| parameter | describe |
|---|---|
| number | Required. Specifies the angle to be converted. |
| Return value: | The radian corresponding to number . |
|---|---|
| Return type: | Float |
| PHP version: | 4+ |
Convert an angle to its corresponding radian equivalent:
<?php$deg = 180;$rad = deg2rad($deg);echo "$deg degrees is equal to $rad radians.";?>