In my project work, I needed to find out whether the given date falls in 1st, 2nd, 3rd, 4th or 5th week of the given month. As usual, I googled for this solution and found many functions. http://www.hotscripts.com/forums/php/37900-week-number-month.html, http://stackoverflow.com/questions/5853380/php-get-number-of-week-for-month and http://mybro…

week_of_month.php

<?php
/**
* Copyright (C) 2016 Prabhas Gupte
* 
* This is free script: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* 
* This script is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
* 
* You should also see <http://www.gnu.org/licenses/gpl.txt>
*/

function week_of_month($date) {
 $timestamp = strtotime($date);
 $year = date('Y', $timestamp);
 $month = date('m', $timestamp);
 
 $w1 = date('W', $timestamp); // current week of year
 $w2 = date('W', strtotime('first thursday of this month')); // week of year, as on first Thursday of given month
 
 return floor($w1-$w2+1);
}

week_of_month('2013-06-10');
?>