问题
array(10) {
[1019]=> array(3) { ["quantity"]=> int(0) ["revenue"]=> int(0) ["seller"]=> string(5) "Lenny" }
[1018]=> array(3) { ["quantity"]=> int(5) ["revenue"]=> int(121) ["seller"]=> string(5) "Lenny" }
[1017]=> array(3) { ["quantity"]=> int(2) ["revenue"]=> int(400) ["seller"]=> string(6) "Anette" }
[1016]=> array(3) { ["quantity"]=> int(25) ["revenue"]=> int(200) ["seller"]=> string(6) "Samuel" }
[1015]=> array(3) { ["quantity"]=> int(1) ["revenue"]=> int(300) ["seller"]=> string(6) "Samuel" }
[1014]=> array(3) { ["quantity"]=> string(2) "41" ["revenue"]=> string(5) "18409" ["seller"]=> string(6) "Samuel" }
}
I am working with the array above. This multi dimensional array is called $stats
.
I would like to sort this array, by the quantity.
So that the multidim array is has its first array 1016 then 1018, 1017 and so on.
I have done this by:
function compare($x, $y) {
if ( $x['quantity'] == $y['quantity'] )
return 0;
else if ( $x['quantity'] > $y['quantity'] )
return -1;
else
return 1;
}
usort($stats, 'compare');
Which works just fine!
But the issue is that the head array index (the ID's, 1019, 1018, 1017 etc) disappears when its getting sorted. I would like to keep the array indexes.
How can I do this?
回答1:
I think what you need is uasort
—
FROM PHP DOC
Sort an array with a user-defined comparison function and maintain index association
Example
uasort($stats, 'compare');
来源:https://stackoverflow.com/questions/13425117/keeping-array-index-key-when-sorting-a-multidimensional-array-with-php