How to show line break from textarea in php mail

Intorduction:
Normally we just get the textarea message filed and put in our Email function, but when Email receive the textarea message filed show as continue without any New Line / line brack /
, so in this atrical i will describe you the simple code to get correct format for the textarea message filed.

PHP Function:  nl2br() 
full Function we use:  nl2br(htmlspecialchars()