How to Reindex a PHP Array Starting from Index 1?

Reindexing Arrays in PHP with Indexes Starting from 1

To reindex an array in PHP with indexes starting from 1, you can use a combination of array manipulation functions. Here's how to achieve this:

PHP Code:

$arr = [
    2 => ['title' => 'Section', 'linked' => 1],
    1 => ['title' => 'Sub-Section', 'linked' => 1],
    0 => ['title' => 'Sub-Sub-Section', 'linked' => null],
];

// Get the values of the array, reindexing from 0
$values = array_values($arr);

// Create a new array, combining new indexes starting from 1 with the values
$reindexed = array_combine(range(1, count($arr)), $values);

// Print the reindexed array
print_r($reindexed);

Explanation:

• array_values() is used to extract the values from the original array, reindexing it from 0.
• range() generates an array of consecutive integers starting from 1, which will be used as the new keys.
• array_combine() combines the new keys with the values to create the reindexed array.

Result:

The reindexed array will have indexes starting from 1, as desired:

Array
(
    [1] => Array
        (
            [title] => Section
            [linked] => 1
        )

    [2] => Array
        (
            [title] => Sub-Section
            [linked] => 1
        )

    [3] => Array
        (
            [title] => Sub-Sub-Section
            [linked] =>
        )
)

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