php check multiple dates in array are within a date range - php

Question

I have an array structured like this:
Array ( [0] => 24-12-2013 [1] => 25-12-2013 [2] => 26-12-2014 [3] => 27-12-2013 [4])
I would like to check if any of the dates in the array are within a given date range.
The date range is structured like this:
$start = (date("d-m-Y", strtotime('25-12-2013')));
$end = (date("d-m-Y", strtotime('26'12'2013')));
I would like to know which dates in the array are within the date range.

Answer 1

Couple things:
Use timestamps or DateTime objects to compare dates, not strings
Use date format YYYY-MM-DD to avoid potential ambiguity about your date format (d/m/y or m/d/y)
This code will do what you want:
$dates = array("2013-12-24","2013-12-25","2014-12-24","2013-12-27");
$start = strtotime('2013-12-25');
$end = strtotime('2013-12-26');
foreach($dates AS $date) {
$timestamp = strtotime($date);
if($timestamp >= $start && $timestamp <= $end) {
echo "The date $date is within our date range\n";
} else {
echo "The date $date is NOT within our date range\n";
}
}
See it in action:
http://3v4l.org/GWJI2

Answer 2

$dates = array ('24-12-2013', '25-12-2013', '26-12-2014', '27-12-2013');
$start = strtotime('25-12-2013');
$end = strtotime('26-12-2013');
$inDateRange = count(
array_filter(
$dates,
function($value) use($start, $end) {
$value = strtotime($value);
return ($value >= $start && $value <= $end);
}
)
);

Answer 3

<?php
$start = DateTime::createFromFormat('d-m-Y', '25-12-2013');
$end = DateTime::createFromFormat('d-m-Y', '26-12-2013');
$dates = array('24-12-2013','25-12-2013','26-12-2014','27-12-2013');
$matches = array();
foreach ($dates as $date) {
$date2 = DateTime::createFromFormat('d-m-Y', $date);
if ($date2 >= $start && $date2 =< $end) {
$matches[] = $date;
}
}
print_r($matches);
See it in action

Answer 4

$_between = array();
$start = date('Ymd', strtotime($start));
$end = date('Ymd', strtotime($end));
foreach ($dates as $date)
{
$date = date('Ymd',strtotime($date));
if ($date > $start && $date < $end) {
array_push($_between,$date);
continue;
}
}
echo '<pre>';
var_dump($_between);
echo '</pre>';

Answer 5

Loop over the array turning each date into unix time (seconds since Jan 1, 1970), and do simple math to see if the number of seconds is between the range. Like so:
$start = strtotime('25-12-2013');
$end = strtotime('26'12'2013');
foreach($date in $dates) {
$unix_time = strtotime($date);
if($unix_time > $start && $unix_time < $end)
//in range
}

Answer 6

// PHP >= 5.3:
$dates_in_range = array_filter($array, function($date) {
global $start;
global $end;
return (strtotime($date) >= strtotime($start) and strtotime($date) <= strtotime($end));
});