Sort an array by key [duplicate]

Question

Array
(
    [1257984000] => 2009-11-11 19:00:00
    [1258416000] => 2009-11-16 19:00:00
    [1258722000] => 2009-11-20 08:00:00
    [1258394400] => 2009-11-16 13:00:00
)

This is my array. I want to sort based on the array number( ie. 1257984000,1258416000 etc).

Coding Used:

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

It is not sorting properly. Whether my coding style is correct?

Gumbo · Accepted Answer · 2009-11-20 19:42:57Z

6

Use ksort to sort by key.

answered Nov 20, 2009 at 19:42

Gumbo

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2 Comments

JW. Over a year ago

uksort in his case, since he wants a comparison function.

Gumbo Over a year ago

@JW: He doesn’t need a comparison function since the default comparison of ksort behaves is the same as his.

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