In PHP, how do I reduce arrays in a memory-efficient way?

In PHP, you can reduce arrays effectively by using various built-in functions like array_splice(), array_slice(), and array_filter(). These functions allow you to manipulate arrays without needing to create additional copies, thus conserving memory. Below is an example of how to reduce an array using array_filter() to keep only the elements that meet a certain condition.

<?php // Original array $numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]; // Use array_filter to keep only even numbers $evenNumbers = array_filter($numbers, function($number) { return $number % 2 === 0; }); // Print the reduced array print_r($evenNumbers); ?>

PHP arrays memory-efficient array_filter reduce arrays

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