How to Insert an Item into a PHP Array at a Specific Index?

How to Insert an Item into an Array at a Specific Position in PHP

Inserting a new element into an array at a specific position can be achieved using the array_splice function in PHP. This function allows for both insertion and removal of elements within an array.

To insert an item, provide the following parameters to array_splice:

• $array: The target array to modify.
• $start: The position where the insertion should occur; indexes in PHP begin from 0.
• $length: Set to 0 as we are not removing any elements.
• $replacements: The item(s) to be inserted.

For instance, the following code inserts the string "x" into the middle of the array $original:

$original = array('a', 'b', 'c', 'd', 'e');
$inserted = array('x');

array_splice($original, 3, 0, $inserted);

// $original is now: array('a', 'b', 'c', 'x', 'd', 'e')

Note: If the replacement is a single element, you can omit the array brackets around it, unless the element itself is an array, object, or NULL.

Caution: The array_splice function modifies the original array in place and does not return the modified array. Therefore, it's important to assign the modified array to a new variable if you wish to preserve the original array.

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