Environment Mismatch Detector

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.
 */

/**
 * Environment Mismatch Detector.
 *
 * Purpose:
 * Detects configuration mismatches between expected and actual environment settings before release.
 *
 * @param array $expected Expected environment values.
 * @param array $actual Actual environment values.
 * @return array Mismatch report.
 */
function ogSnippetEnvironmentMismatchDetector(array $expected, array $actual): array {
	$mismatches = array();
	foreach ($expected as $key => $expected_value) {
		$actual_value = null;
		if (array_key_exists($key, $actual)) {
			$actual_value = $actual[$key];
		}
		if ($actual_value !== $expected_value) {
			$mismatches[] = array('key' => (string) $key, 'expected' => $expected_value, 'actual' => $actual_value);
		}
	}
	return $mismatches;
}

$mismatches = ogSnippetEnvironmentMismatchDetector(array('APP_ENV' => 'production', 'SSL' => 'on'), array('APP_ENV' => 'staging', 'SSL' => 'on'));
echo count($mismatches);