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PHP code:

<?php
date_default_timezone_set('Asia/Shanghai');

$date1 = strtotime('2010-01-01');
$date2 = 1*7*24*60*60; //µÚÒ»¸ö¡°1¡±¾ÍÊÇÄãÒªÌîдµÚ¼¸ÖÜ
$date3 = $date1+$date2;
echo date('Y-m-d',$date3);



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PHP code:

function GetWeekDate ($week, $year) {
$timestamp = mktime(0, 0, 0, 1, 1, $year);
$dayofweek = date("w", $timestamp);
if ($week != 1) {
$distance = ($week - 1) * 7 - $dayofweek + 1;
$passed_seconds = $distance * 86400;
$timestamp += $passed_seconds;
$firt_date_of_week = date("Ymd", $timestamp);
}
if ($week == 1) {
$distance = 7 - $dayofweek;
} else {
$distance = 6;
$timestamp += $distance * 86400;
$last_date_of_week = date("Ymd", $timestamp);
}
echo $year . 'ÄêµÄµÚ' . $week . 'ÐÇÆÚµÄÐÇÆÚÒ»ÊÇ£º' . $firt_date_of_week . '£¬ÐÇÆÚÌìÊÇ' . $last_date_of_week;
}
GetWeekDate (3, 2010);



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PHP code:

$date = '2009-12-25';
$ptn = '/([\d]{4})[- \/](0?[\d]|1[0-2])[-\/ ](0?[\d]|[1-2][\d]|3[0-1])/';
if (preg_match($ptn,$date,$out))
{
print_r($out);exit();
}
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