Double explode a text field containing date and time in PHP - php

Question

I have a lengthy text field containing multiple date and time separated by comma. Following is the example
2013-08-26 10:00:00,2013-08-26 15:00:00,2013-08-26 20:00:00
2013-08-27 01:00:00,2013-08-27 06:00:00,2013-08-27 11:00:00
2013-08-27 16:00:00,2013-08-27 21:00:00,2013-08-28 02:00:00
2013-08-28 07:00:00,2013-08-28 12:00:00,2013-08-28 17:00:00
From the above example I need the following structure
Step 1: Split comma separated values into one array.
Step 2: From the above obtained array push all 2013-08-26 dates to one array, the 2013-08-27 to another array and then 2013-08-28.
I successfully exploded the main text to one array but did not succeed to obtain list of values of one particular date.

Answer 1

foreach (explode(PHP_EOL, $dates) as $line)
{
foreach (explode(',', $line) as $dt)
{
$dateVal = date('Y-m-d', strtotime($dt));
switch ($dateVal)
{
case '2013-08-26':
$arr1[] = $dt;
break;
case '2013-08-27':
$arr2[] = $dt;
break;
case '2013-08-28':
$arr3[] = $dt;
break;
}
}
}
Online demo

Answer 2

$dates = "2013-08-26 10:00:00,2013-08-26 15:00:00,2013-08-26 20:00:00
2013-08-27 01:00:00,2013-08-27 06:00:00,2013-08-27 11:00:00
2013-08-27 16:00:00,2013-08-27 21:00:00,2013-08-28 02:00:00
2013-08-28 07:00:00,2013-08-28 12:00:00,2013-08-28 17:00:00";
$dates = explode("\n", $dates);
foreach($dates as $date) {
$date = explode(",", $date);
var_dump($date);
// i.e. with $date[1] I will get the middle date of particular line.
}
$date inside foreach, as you can see becomes an array (after exploding) containing all dates separated by commas in one line.

Answer 3

it's been a while since the last time I used PHP, but this is my rusty solution:
$map = array();
$records = explode(',', $input);
foreach( $records as $record )
{
$a = explode(" ", $record);
if(!array_key_exists( $a[0], $map ))
$map[$a[0]] = array();
$map[$a[0]][] = $a[1];
}
var_dump($map);
I haven't tested it, sorry. But it might work...
it should give you something like:
array(2)
(
['2014-03-14'] => array(2)
(
[0] => '04:03:24'
[1] => '04:03:25'
)
['2014-03-14'] => array(2)
(
[0] => '04:03:24'
[1] => '04:03:25'
)
)