How to find first date and last date of month using php

Hi guys, i am going to share and very simple but very important function with you. In this post i am gonna show you how to find first date and last date of current month using php. Here are the two functions,

 <?php  
 function firstOfMonth()  
 {  
      return date("m/d/Y", strtotime(date('m').'/01/'.date('Y').' 00:00:00'));  
 }  
 function lastOfMonth()  
 {  
      return date("m/d/Y", strtotime('-1 second',strtotime('+1 month',strtotime(date('m').'/01/'.date('Y').' 00:00:00'))));  
 }  
 ?>