I have this multi value array which I want to sort
Array(
[0] => word1 131
[1] => word2 3
[2] => word3 5
[3] => word4 4
[4] => word5 16
[5] => word6 29
)
How do I sort it using the number value on the right so the result will be like this.
Array(
[0] => word2 3
[1] => word4 4
[2] => word3 5
[3] => word5 16
[4] => word6 29
[5] => word1 131
)
Thx
You'll want to use usort and create a callback function that parses the string and sorts the data.
function usort_callback($a, $b)
{
$a = preg_replace('/^.+\s(\d+)$/', '$1', $a);
$b = preg_replace('/^.+\s(\d+)$/', '$1', $b);
return ( intval($a) < intval($b) ) ? -1 : 1;
}
usort($array, 'usort_callback');
You will need to use explode or str_split() to isolate the number on the right, sort using array_sort() or one of the related functions, and reassemble the array.
Define a comparison function and use usort. In your comparison function you can use str_split or pregmatch to get interesting parts of strings.
You can use usort and users function like this:
<?php
function cmp($a, $b) {
$a = (int)substr(strstr($a, ' '), 1);
$b = (int)substr(strstr($b, ' '), 1);
return ($a < $b) ? -1 : 1;
}
$array = array(
'word1 131',
'word2 3',
'word3 5',
'word4 4',
'word5 16',
'word6 29'
);
usort($array, "cmp");
foreach ($array as $key => $value) {
echo "$key: $value\n";
}
?>
