PHP Organize Date Variables

[dirtbikerxz]

So I have 5 variables containing dates (in php)

 

$regend1 =  2016-04-30

$regend2 =  2016-03-25

$regend3 =  2016-04-12

$regend4 =  2016-04-20

$regend5 =  2016-02-07

 

How can i order them from lowest to highest using php? The output needs to be something that says $regend5 is first, $regend2 is second, $regend3 is third, $regend4 is fourth, and $regend1 is fifth ... or something like that. Thanks in advance

[mariushm]

Put them in an array  as datetime objects or maybe build a string in the form  YYYYMMDD  (add zeroes where necessary).  With strings in each array

If you use strings, you can do a simple sort. With datetime objects, you can create a custom sort function :

 

<?php

$the_array = array();
$the_array[] = [1, new Datetime('2016-04-30')]; // year , month , day
$the_array[] = [2, new Datetime('2016-03-25')]; // year , month , day

// add the others

$the_array[] = [5,new Datetime('2016-04-12')]; // year , month , day

// show the contents of the array
var_dump($the_array);

// sort the array using a callback function

function compare_array_entries($a, $b) {

// $a = one entry in array, $b = following entry in array
// [0] = the number , [1] = the datetime object

  if ($a[1] == $b[1]) {
    return 0;
  }

  return ($a[1]< $b[1]) ? -1 : 1;
}

// now do the actual sorting using the callback function above to actually compare two entries at a time

usort($the_array,'compare_array_entries');

// dump the array contents again

var_dump($the_array);

// now you can use something like foreach ($the_array as $key = > $value)  {   }  to go through the array. , $value[0] is your number, $value[1] is your datetime object

?>

 

 

[dirtbikerxz]

Thanks! Will try it out as soon as I get home and let you know.