How do I sort a PHP array based on its keys?

If you take a look at PHP's Sorting Arrays manual page, you can see there are a few options for sorting the array based on its keys, of which ksort (using the SORT_NUMERIC modifier) is most likely the one you're after. @Alexandra Apologies - you need to use the SORT_NUMERIC modifier to ksort.

How to sort array elements using heap sort?

Given an array of size N. The task is to sort the array elements by completing functions heapify() and buildHeap() which are used to implement Heap Sort. Input: N = 5 arr = {4,1,3,9,7} Output: 1 3 4 7 9 Explanation: After sorting elements using heap sort, elements will be in order as 1,3,4,7,9.

How do I sort an array by the key of a sub-array?

Here is a function to sort an array by the key of his sub-array. Note that this function will output the given $fields in the order they were added to the data array and not automatically in numerical key order. To output in ascending key order, you'll need to ksort the array first (or use appropriate natural order sorting, depending on your keys).

How do I sort an array in ascending order?

The result should have the array sorted by the keys in ascending order: Array ( [first_name] => Array ( => 4567 => 9876 => 12345 ) [score] => Array ( => 4567 => 12345 => 9876 ) ) There a few bajillion q/a's on this site on how to sort arrays in any way imaginable... take a few minutes to look around.