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PHP Exercises: Deep flatten an given array

PHP: Exercise-79 with Solution

Write a PHP program to deep flatten an given array.

Sample Solution: -

PHP Code:

<?php
function deep_flatten($items)
{
    $result = [];
    foreach ($items as $item) {
        if (!is_array($item)) {
            $result[] = $item;
        } else {
            $result = array_merge($result, deep_flatten($item));
        }
    }
    return $result;
}
$result = deep_flatten([1, [2], [[3], 4], 5, 6]); 
print_r($result);

?>

Sample Output: 

Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => 5
    [5] => 6
)

Flowchart:

Flowchart: Deep flatten an given array.

PHP Code Editor:

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Previous: Write a PHP program to create a function that returns true for all elements of an array, false otherwise.
Next: Write a PHP program to create a new array with n elements removed from the left.

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PHP: Tips of the Day

Returns all elements in an array except for the first one

Example:

<?php
function tips_tail($items)
{
  return count($items) > 1 ? array_slice($items, 1) : $items;
}

print_r(tips_tail([1, 5, 7]));
?>

Output:

Array
(
    [0] => 5
    [1] => 7
)