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PHP deg2rad() Function

Complete PHP Math Reference

Definition and Usage

The deg2rad() function converts a degree to its radian number.

Syntax

deg2rad(degree_number)

Parameter	Description
degree_number	Required. Specifies the degree to convert

Example 1

<?php
echo deg2rad("30") . "<br />";
echo deg2rad("10") . "<br />";
echo deg2rad("1587") . "<br />";
echo deg2rad("70");
?>

The output of the code above will be:

0.523598775598
0.174532925199
27.6983752292
1.2217304764

Example 2

<?php
$deg = 180;
$rad = deg2rad($deg);
echo "$deg degrees is equal to $rad radians";
?>