Syntax of defined
float deg2rad(float number)
Converts number from degrees to radians and returns the result
Example of deg2rad
<?php
echo deg2rad(45); // 0.785398163397
var_dump(deg2rad(45) === M_PI_4); // bool(true)
?>
<?php
echo deg2rad("45") . "<br>";
echo deg2rad("90") . "<br>";
echo deg2rad("360");
?>
Output
0.78539816339745
1.5707963267949
6.2831853071796