array_replace_recursive
array array_replace_recursive(arrayarray1, arrayarray2[, ... arrayarrayN])
Returns an array created by replacing values in
array1 with values from the other arrays.
Elements in array1 with keys matching in
the replacement arrays are replaced with the values of those
elements.
If the value in both array1 and a
replacement array for a particular key are arrays, those values in
those arrays are recursively merged using the same process.
If multiple replacement arrays are provided, they are processed
in order. Any elements in array1 whose keys
do not match any keys in the replacement arrays are preserved.
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