PHP Array Exercises : Set union of two arrays

PHP Array: Exercise-48 with Solution

Write a PHP function to set union of two arrays.

Sample Solution:

PHP Code:

function array_union($x, $y)
      $aunion=  array_merge(
            array_intersect($x, $y),
            array_diff($x, $y),     
            array_diff($y, $x)      
        return $aunion;
$a = array(1, 2, 3, 4);
$b = array(2, 3, 4, 5, 6);
print_r(array_union($a, $b));

Sample Output:

    [0] => 2                                                
    [1] => 3                                                
    [2] => 4                                                
    [3] => 1                                                
    [4] => 5                                                
    [5] => 6                                                


Flowchart: PHP - Set union of two arrays

PHP Code Editor:

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PHP: Tips of the Day

PHP: How to generate a random, unique, alphanumeric string for use in a secret link?

Security Notice: This solution should not be used in situations where the quality of your randomness can affect the security of an application. In particular, rand() and uniqid() are not cryptographically secure random number generators. See Scott's answer for a secure alternative.

If you do not need it to be absolutely unique over time:

md5(uniqid(rand(), true))

Otherwise (given you have already determined a unique login for your user):

md5(uniqid($your_user_login, true))

Ref : https://bit.ly/31fd9wa


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