When i try to apply the below code from here
usort($myArray, function($a, $b) { return $a['order'] - $b['order']; });
it gives me results in ascending order.
Output:
0 0 0 0 0 0.29 1.09 6.33
On swapping $a and $b it gives the results in descending order except one value
usort($myArray, function($a, $b) { return $b['order'] - $a['order']; });
Output:
6.33 1.09 0 0 0 0 0.29 0
i want to have the results in the below order:
6.33 1.09 0.29 0 0 0 0 0
How do i achieve the same.?
The usort() function sorts an array by a user defined comparison function. This function assigns new keys for the elements in the array. Existing keys will be removed.
Approach: The usort() function is an inbuilt function in PHP which is used to sort the array of elements conditionally with a given comparator function. The usort() function can also be used to sort an array of objects by object field.
The arsort() function sorts an associative array in descending order, according to the value. Tip: Use the asort() function to sort an associative array in ascending order, according to the value. Tip: Use the krsort() function to sort an associative array in descending order, according to the key.
My first guess is that usort expects an integer response, and will round off your return values if they are not integers. In the case of 0.29, when it is compared to 0, the result is 0.29 (or -0.29), which rounds off to 0. For usort, 0 means the two values are equal.
Try something like this instead:
usort($myArray, function($a, $b) { if($a['order']==$b['order']) return 0; return $a['order'] < $b['order']?1:-1; });
(I think that's the correct direction. To reverse the order, change the <
to >
)
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