PHP array_intersect_uassoc() Function

Hello folks! welcome to another section of our tutorial on PHP. In this tutorial, we will be discussing about the array_intersect_uassoc() Function in PHP.

The PHP array_intersect_uassoc() function returns an array which contains all the values of array1 that are available in all of the arguments.


Following below is the syntax to use this function -

array_intersect_uassoc($array1, $array2 [, $array3 ..., callback $key_compare_func] );

Parameter Details

Sr.NoParameter & Description


The first array is the array that the others will be compared with.



This is an array to be compared with the first array



This is an array to be compared with the first array



User defined call back function.

Return Value

It returns an array containing all the values of array1 that are present in all the arguments.


Try out the below example -

   $input1 = array("a" => "green", "b" => "brown", "c" => "blue", "red");
   $input2 = array("a" => "GREEN", "B" => "brown", "yellow", "RED");
   $result = array_intersect_uassoc($input1, $input2, "strcasecmp");


When the above code is executed, it will produce the following result -

Array ( [b] => brown )

Alright guys! This is where we are rounding up for this tutorial post. In our next tutorial, we will discuss about the array_intersect_ukey() Function in PHP.

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