How to Efficiently Extract the First N Elements from an Array in PHP?

Retrieving the First N Elements from an Array

How can you efficiently extract the first N elements from an array in PHP?

Solution:

The most effective approach is to utilize the array_slice() function. Here's an example:

<code class="php">$input = array("a", "b", "c", "d", "e");
$output = array_slice($input, 0, 3); // returns "a", "b", and "c"</code>

Consideration:

One potential issue arises when the array indices hold significance. array_slice() resets and reorders numeric indices. To preserve the original indices, set the preserve_keys flag to true as the fourth parameter.

Example:

<code class="php">$output = array_slice($input, 2, 3, true);</code>

Output:

<code class="php">array([3]=>'c', [4]=>'d', [5]=>'e');</code>

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