(PHP 4, PHP 5, PHP 7)
deg2rad — 锟斤拷锟角讹拷转锟斤拷为锟斤拷锟斤拷
$number
) : float
锟斤拷锟斤拷锟斤拷锟斤拷 number 锟接角讹拷转锟斤拷锟缴伙拷锟饺★拷
number锟皆角讹拷为锟斤拷位锟斤拷值
number 锟斤拷锟斤拷锟侥伙拷锟斤拷值
Example #1 deg2rad() 锟斤拷锟斤拷
<?php
echo deg2rad(45); // 0.785398163397
var_dump(deg2rad(45) === M_PI_4); // bool(true)
?>