PHP method to get the start and end dates of each week of the year, php get_PHP tutorial

How to get the start and end dates of each week of the year in PHP, get

The example in this article describes how to get the start and end dates of each week of the year in PHP. Share it with everyone for your reference. The specific analysis is as follows:

In a recent project, I need to create a function to submit weekly reports. I need to know the start and end dates of specified weeks in order to handle other business. The following is a piece of code that uses PHP to get the start date and end date of each week of the year to share with you.
The following is a code that uses PHP to get the start date and end date of each week of the year.

function get_week($year) { 
$year_start = $year . "-01-01"; 
$year_end = $year . "-12-31"; 
$startday = strtotime($year_start); 
if (intval(date('N', $startday)) != '1') { 
$startday=strtotime("nextmonday",strtotime($year_start));
//获取年第一周的日期 
} 
$year_mondy = date("Y-m-d", $startday);//获取年第一周的日期 
$endday = strtotime($year_end); 
if (intval(date('W', $endday)) == '7') { 
$endday=strtotime("lastsunday",strtotime($year_end)); 
} 
$num = intval(date('W', $endday)); 
for ($i = 1; $i <= $num; $i++) { 
$j = $i -1; 
$start_date = date("Y-m-d", strtotime("$year_mondy $j week ")); 
$end_day = date("Y-m-d", strtotime("$start_date +6 day")); 
$week_array[$i] = array( 
str_replace("-",".",$start_date),str_replace("-",".",$end_day)); 
} 
return $week_array; 
}

The function get_week() gets the week number of the first and last day of the year by passing in the parameter $year, calculates the date of the first week, and obtains the date of the first and last day of each week through a loop. The final return is an array.
If you want to get the start date and end date of a specified week, such as the start date and end date of week 18 in 2011, the code is as follows:

$weeks = get_week(2011); 
echo '第18周开始日期：'.$weeks[18][0].''; 
echo '第18周结束日期：'.$weeks[18][1];

Final output result:

1. 第18周开始日期：2011.05.02 
2. 第18周结束日期：2011.05.08

I hope this article will be helpful to everyone’s PHP programming design.