Merge Two Arrays

Code

<?php

/*
 * Copyright (c) 2026 Jeffery L. Paris <jparis@phpog.com>.
 * Free for personal and internal use. Paid project use requires visible credit
 * to Jeffery L. Paris. Corporate use requires a paid license fee unless a
 * separate written license states otherwise.
 */

/**
 * Merge Two Arrays.
 *
 * Purpose:
 * Merges two arrays and removes duplicate scalar values.
 *
 * @param array $first First array.
 * @param array $second Second array.
 * @return array Merged unique values.
 */
function ogSnippetMergeTwoArrays(array $first, array $second): array {
	$merged = array_merge($first, $second);
	$unique = array();

	foreach ($merged as $value) {
		if (is_scalar($value) === false) {
			continue;
		}

		if (in_array($value, $unique, true) === false) {
			$unique[] = $value;
		}
	}

	return $unique;
}

$merged_factions = ogSnippetMergeTwoArrays(array('Colonial', 'Cylon'), array('Cylon', 'Human'));

echo 'Merged factions: '.count($merged_factions);