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<decoctexp>
^Math FunctionsLast updated: Mon, 26 Oct 2026

deg2rad

(PHP 4, PHP 5, PHP 7, PHP 8)

deg2rad — Converts the number in degrees to the radian equivalent

Description

function deg2rad(float $num): float

This function converts num from degrees to the radian equivalent.

Parameters

num

Angular value in degrees

Return Values

The radian equivalent of num

Examples

Example #1 deg2rad() example

<?php

echo deg2rad(45), PHP_EOL; // 0.785398163397
var_dump(deg2rad(45) === M_PI_4); // bool(true)

?>

See Also

  • rad2deg() - Converts the radian number to the equivalent number in degrees


<decoctexp>
^Math FunctionsLast updated: Mon, 26 Oct 2026