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NEXT and PREV Date navigation

I am trying to create a Previous week and Next Week button:  However, I'm not sure what I am doing wrong right now;
$timestamp      = strtotime(date('Y-m-01', strtotime($date)));
    $caption     	= date("F Y", $timestamp);
   	$week_number 	= date("W");
	$year 			= date("Y");
	
	$date = !empty($_GET['d']) ? $_GET['d'] : 'Today';
	$prev = date('Y-m-01', strtotime("$date - 1 week"));
	$next = date('Y-m-01', strtotime("$date + 1 week"));
	$prev_link = '<a href="' . $_SERVER['PHP_SELF'] . "?d=$prev" . '">Prev</a>' . PHP_EOL;
	$next_link = '<a href="' . $_SERVER['PHP_SELF'] . "?d=$next" . '">Next</a>' . PHP_EOL;

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rgranlund
Asked:
rgranlund
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1 Solution
 
Ray PaseurCommented:
It looks like you may be confusing the pattern for months with the pattern for weeks.  Please read this article and while you do that I will see if I can give you a design pattern that works.
http://www.experts-exchange.com/Web_Development/Web_Languages-Standards/PHP/A_201-Handling-date-and-time-in-PHP-and-MySQL.html
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Ray PaseurCommented:
This seems to work: http://www.laprbass.com/RAY_temp_rgranlund.php

<?php // RAY_temp_rgranlund.php
error_reporting(E_ALL);

// SEE http://www.experts-exchange.com/Web_Development/Web_Languages-Standards/PHP/Q_28311728.html

$ts = !empty($_GET['d']) ? strtotime($_GET['d']) : strtotime('Today');
if (!$ts) $ts = strtotime('Today');
$prev = date('Y-m-d', $ts - 60*60*24*7);
$next = date('Y-m-d', $ts + 60*60*24*7);

$prev_link = '<a href="' . $_SERVER['PHP_SELF'] . "?d=$prev" . '">Prev</a>' . PHP_EOL;
$next_link = '<a href="' . $_SERVER['PHP_SELF'] . "?d=$next" . '">Next</a>' . PHP_EOL;

echo $prev_link . ' ' . $next_link;

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