How to rename sub-array keys in PHP?

You can use the array_combine function in PHP to create a new array by using one array for the keys and another for the values. Here's an example of how you can use array_combine to rename the keys of a sub-array:

Example of renaming sub-array keys in PHP

This will output:

Array
(
    [x] => a
    [y] => b
    [z] => c
)

You can then use this $renamed_array in place of the original sub-array.

Note that array_combine requires that the two input arrays have the same number of elements. If the arrays have different lengths, array_combine will return FALSE.