PHP Array Exercises : Combine two arrays

Last update on May 30 2025 13:14:35 (UTC/GMT +8 hours)

58. Combine Two Arrays (Keys and Values)

Write a PHP script to combine (using one array for keys and another for its values) the following two arrays.

('x', 'y', 'y'), (10, 20, 30)

Sample Solution:

PHP Code:

<?php
// Function to combine two arrays into an associative array
function combine_Array($keys, $values)
{
    // Initialize an empty array to store the combined result
    $result = array();

    // Iterate through each element of the $keys array
    foreach ($keys as $i => $k) {
        // Use the keys as indices and group values accordingly
        $result[$k][] = $values[$i];
    }

    // Use array_walk to iterate through each element in $result and modify it
    array_walk($result, function (&$v) {
        // If an array has only one element, replace it with that element
        $v = (count($v) == 1) ? array_pop($v) : $v;
    });

    // Return the combined array
    return $result;
}

// Two arrays to be combined
$array1 = array('x', 'y', 'y');
$array2 = array(10, 20, 30);

// Print the result of combining the arrays
print_r(combine_Array($array1, $array2));

?>

Output:

Array
(
    [x] => 10
    [y] => Array
        (
            [0] => 20
            [1] => 30
        )

)

Flowchart:

For more Practice: Solve these Related Problems:

Write a PHP script to merge two arrays where one array provides keys and the other provides values, then output the resulting associative array.
Write a PHP function to combine an array of keys and an array of values into a single associative array, handling mismatched lengths.
Write a PHP program to use array_combine() to merge two given arrays and then validate the output structure.
Write a PHP script to simulate the combination of two arrays without using array_combine(), by manually iterating over the elements.

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