array_diff_uassoc(): Difference between two arrays considering additional key checks through callback function
my_function() : is the callback function to return integer less than , equal to or greater than zero after comparing the keys. Returns all elements of $array1 which are not present in $array2 considering keys also. Keys comparison is done through call-back function my_function(). Example with two arrays
Output is here.
Keys of the first index are retained. ( no re-indexing done here) . The element with value Third is included in output as the index or key is not matching with $second array though the value is matching.
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