使用php通过10次迭代一次增加一周的日期

Question

I want to increment a start date by 1 week 10 times. This code doesn't work:

<?php 

$start_date = "06/25/2012";  
$date = strtotime($start_date);
$X=1;

while ($X <= 10) {$X++; $Y=7*$X;

$date = strtotime("+ $Y days", $date);
echo date('m/d/Y', $date)."<br>";

}

gives:

07/09/2012
07/30/2012
08/27/2012
10/01/2012
11/12/2012
12/31/2012
02/25/2013
04/29/2013
07/08/2013
09/23/2013

This is wrong!

Answer 1

May be you are looking for this: Online Example

$start_date = "06/25/2012";  
$date = strtotime($start_date);
$X=1;

while ($X <= 10) {
    $X++; 
    $date = strtotime("+1 weeks", $date);
    echo date('m/d/Y', $date)."<br>";
}

Answer 2

Using DateTime objects:

$date = new DateTime('2012-06-25');
for ($i = 1; $i <= 10; $i++) {
    $date->modify('+1 week');
    echo $date->format('m/d/Y');
}

Ideone: https://ideone.com/7mVkmW

Answer 3

Try this code. This will give you list of 1 week period dates 50 times.

<?php
$date = "05/01/2016";
$weekDates = '';

for ( $i = 1; $i <= 50; $i++ ) {
   $date = date("m/d/Y", strtotime("+1 weeks", strtotime($date)));
   $weekDates .= $date . '<br>';
}

echo $weekDates;

Answer 4

Answer:

<?php 

$start_date = "06/25/2012";  
$date = strtotime($start_date);
$newDate = $date;

for ($x = 1; $x<=10; $x++)
{
    $newDate = $newDate + (86400*7);//adding the amount of seconds in a week
    $buffer = date("n/j/Y", $newDate);
    echo "{$buffer}<br>";
}

Explanation of the code:

What the previous code does is it first converts the date "06/25/2012" into a unix timestamp. A unix timestamp is an integer value that represents how much time (in seconds) has passed since January 1st of 1970. In the previous code, both $date and $newDate are unix timestamp values that look like the following big number: 1464330512

From there, you want to create a loop. I preferred to use a for loop because it is very easy to read and suits your purpose. A while loop can also be done, though you would have to create a count of sorts if you choose that loop instead.

From there, what the code above does is that it modifies $newDate on every loop by adding the amount of seconds in a week to it ( 86400*7 ). After altering $newDate , the $buffer value then converts the $newDate to the same format as your original date, and echoes it.