Sometimes, we want to sort a multidimensional array by elements containing Y-m-d H:i:s date with PHP.
In this article, we’ll look at how to sort a multidimensional array by elements containing Y-m-d H:i:s date with PHP.
How to sort a multidimensional array by elements containing Y-m-d H:i:s date with PHP?
To sort a multidimensional array by elements containing Y-m-d H:i:s date with PHP, we use the strtotime and usort functions.
For instance, we write
function date_compare($a, $b)
{
$t1 = strtotime($a["datetime"]);
$t2 = strtotime($b["datetime"]);
return $t1 - $t2;
}
usort($array, "date_compare");
to call usort with $array and 'date_compare' to sort the $array in place with the date_compare function as the comparator function.
In date_compare, we convert the 'datetime' values of $a and $b to timestamps with strtotime.
Then we subtract the timestamps to compare them.
Conclusion
To sort a multidimensional array by elements containing Y-m-d H:i:s date with PHP, we use the strtotime and usort functions.
