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The PHP Math deg2rad() function is used to convert an angle in degrees to an angle in radians.

Syntax

deg2rad(number)

Parameters

number Required. Specify an angle in degrees to convert.

Return Value

The radian equivalent of an angle in degrees.

Example:

In the below example, deg2rad() function is used to convert an angle in degree to an angle in radian.

<?php
$x = 30; 
$y = 60;
$z = 90;

echo "deg2rad($x) returns: ".deg2rad($x)."\n";
echo "deg2rad($y) returns: ".deg2rad($y)."\n";
echo "deg2rad($z) returns: ".deg2rad($z)."\n";
?>

The output of the above code will be:

deg2rad(30) returns: 0.5235987755983
deg2rad(60) returns: 1.0471975511966
deg2rad(90) returns: 1.5707963267949

❮ PHP Math Functions