June 29, 2013

Unsort in array

Alex’s Question:

Good day.

I would be like get 3 keys from $arr where value $arN[0] will be more than other…



$arr[]=array(6299927 => $ar1);
$arr[]=array(1252760 => $ar2);
$arr[]=array(3432444 => $ar3);
$arr[]=array(3435543 => $ar4);
$arr[]=array(7645466 => $ar5);
$arr[]=array(4574534 => $ar6);

Next function sorting array $a descending:

function cmp($a, $b)
    if ($a == $b) {
        return 0;
    return ($a < $b) ? 1 : -1;

$a = array(3, 2, 5, 6, 1);

usort($, "cmp");

foreach ($a as $key => $value) {
    echo "$key: $valuen";
outpoot: 0:6 1:5 2:4 3:2 4:1

But how change this function for my example(for my big array)?

Tell me please how make this?

How write right?

Very confusing but I think you are looking for something like this. It will give you the index of the array whose first item is greater than the first item in the next array.

foreach($arr as $key => $array) {
    if($array[0] > $arr[$key+1][0]) {
       echo $key;

Author: Nabin Nepal (Starx)

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