The array_intersect_ ukey() function is used to compare two or more array against keys, by the help of user-defined function and the function return an array. The returned array is the first array, which is matching keys and present in all parameters is the final output.
Syntax:
array_intersect_ ukey($array1, $array2, $array3……., ukey_intersectFunction)
Parameters Used:
This function accepts two parameters First parameter is an array list ($array1, $array2, $array3, ………. $arraynth) and minimum two arrays are required. Second parameter is a user-defined function(ukey_intersectFunction) The parameters are described below:
- array1 : It is the initial array and compares to another array. It is Mandatory .
- array2 : The array Compared with the first array key. It is Mandatory .
- array3 : The second array Compared with the first array key. It is Optional.
- ukey_intersectFunction : It is Required user-defined function. A string that defines a callable comparison function.
Return Value:
Returns an array types values which contain the first array whose keys is exits in all others arguments.
Note: The function uses a user-defined function to compare the keys. Not compare values of keys.
Let’s take some examples to understand the array_intersect_ ukey() Function.
Program 1:
Take two array (array1 and array2) and using user-defined key comparison function (ukey_intersectFunction).
<?php // PHP array_intersect_ ukey() function // program function ukey_intersectFunction( $x , $y ) { if ( $x === $y ) return 0; return ( $x > $y )? 1: -1; } $a1 = array ( "a" => "Java" , "b" => "C++" , "c" => "XML" , "d" => "Python" , "p" => "PHP" ); $a2 = array ( "a" => "Python" , "b" => "CSS" , "h" => "VB" , "x" => "HTML" , "p" => "SQL" ); // print result wich key is matching form both // array and print first arary elements. $result = array_intersect_ukey ( $a1 , $a2 , "ukey_intersectFunction" ); print_r( $result ); ?> |
Array ( [a] => Java [b] => C++ [p] => PHP )
Program 2:
Take four array(array1, array2, array3 and array4) and using user-defined key comparison function (ukey_intersectFunction).
<?php // PHP array_intersect_ ukey() function // program function ukey_intersectFunction( $x , $y ) { if ( $x === $y ) return 0; return ( $x > $y )? 1: -1; } // Arrays $arr1 = array ( "a" => "A" , "b" => "B" , "c" => "D" , "d" => "E" , "p" => "F" ); $arr2 = array ( "o" => "A" , "b" => "B" , "h" => "V" , "x" => "T" , "p" => "X" ); $arr3 = array ( "a" => "N" , "b" => "B" , "h" => "O" , "x" => "T" , "p" => "P" ); $arr4 = array ( "s" => "W" , "b" => "B" , "z" => "D" , "x" => "T" , "p" => "P" ); // print result wich key is matching form both // array and print first arary elements. $result = array_intersect_ukey ( $arr1 , $arr2 , $arr3 , $arr4 , "ukey_intersectFunction" ); print_r( $result ); ?> |
Array ( [b] => B [p] => F )
Program 3:
Take three arrays (array1, array2, and array3) and using user-defined key comparison function, all have the same key and different values. Return and display the result of array1.
<?php // PHP array_intersect_ ukey() function // program function ukey_intersectFunction( $x , $y ) { if ( $x === $y ) return 0; return ( $x > $y )? 1: -1; } // Arrays $arr1 = array ( "a" => "Bhopal" , "b" => "New Delhi" , "n" => "Madras" , "o" => "Mumbai" , "p" => "Finland" ); $arr2 = array ( "a" => "Bhubaneswar" , "b" => "Ranchi" , "n" => "Kolkatta" , "o" => "Luknow" , "p" => "Allahabad" ); $arr3 = array ( "a" => "Rourkela" , "b" => "Jammu" , "n" => "Kasmir" , "o" => "Tripura" , "p" => "Sillong" ); // print result wich key is matching form both // array and print first arary elements. $result = array_intersect_ukey ( $arr1 , $arr2 , $arr3 , "ukey_intersectFunction" ); print_r( $result ); ?> |
Array ( [a] => Bhopal [b] => New Delhi [n] => Madras [o] => Mumbai [p] => Finland )
Program 4:
Take two array (array1 and array2), using user-defined key comparison function(ukey_intersectFunction). There are both array have different key then array return NULL/Empty Array .
<?php // PHP array_intersect_ ukey() function // program function ukey_intersectFunction( $x , $y ) { if ( $x === $y ) return 0; return ( $x > $y )? 1: -1; } // Arrays $arr1 = array ( "a" => "IIT Sillong" , "b" => "IIT Bhopal" , "n" => "NIT Bhopal" ); $arr2 = array ( "x" => "IIT Bhubaneswar" , "y" => "IIT Ranchi" , "z" => "NIT Durgapur" ); // print result wich key is matching form both // array and print first arary elements. $result = array_intersect_ukey ( $arr1 , $arr2 , "ukey_intersectFunction" ); print_r( $result ); ?> |
Array ( )
Program 5:
Take two array (array1 and array2), There both array have different key But same value in same index, compare array return NULL/Empty Array.
<?php // PHP array_intersect_ ukey() function // program function ukey_intersectFunction( $x , $y ) { if ( $x === $y ) return 0; return ( $x > $y )? 1: -1; } // Arrays $arr1 = array ( "a" => "IIT" , "b" => "CIT" , "n" => "NIT" ); $arr2 = array ( "x" => "IIT" , "y" => "CIT" , "z" => "NIT" ); // print result wich key is matching form both // array and print first arary elements. $result = array_intersect_ukey ( $arr1 , $arr2 , "ukey_intersectFunction" ); print_r( $result ); ?> |
Array ( )
Related Articles:
- PHP | array_diff_key() Function
- PHP | array_intersect_key() Function
- PHP | array_intersect() Function
- PHP | array_intersect_assoc() Function
- PHP | array_uintersect_assoc() Function
References:http://php.net/manual/en/function.array-intersect-ukey.php
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