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Math Functions
PHP Manual

# deg2rad

Converts the number in degrees to the radian equivalent

### Description

float deg2rad ( float `$number` )

This function converts `number` from degrees to the radian equivalent.

### Parameters

`number`

  Angular value in degrees

### Return Values

The radian equivalent of `number`

### Examples

Example #1 deg2rad example

`<?php
echo deg2rad(45); // 0.785398163397
var_dump(deg2rad(45) === M_PI_4); // bool(true)
?>`

### See Also

- rad2deg