Add src files for CoreLibs composer all package

src/Check/PhpVersion.php

@@ -0,0 +1,75 @@
+<?php
+
+declare(strict_types=1);
+
+namespace CoreLibs\Check;
+
+class PhpVersion
+{
+	/**
+	 * checks if running PHP version matches given PHP version (min or max)
+	 * if either is empty or null it will be ignored
+	 * if no min version (null or empty)
+	 *
+	 * @param  string|null $min_version minimum version as string (x, x.y, x.y.x)
+	 * @param  string|null $max_version optional maximum version as string (x, x.y, x.y.x)
+	 * @return bool                true if ok, false if not matching version
+	 */
+	public static function checkPHPVersion(?string $min_version, ?string $max_version = null): bool
+	{
+		// exit with false if the min/max strings are wrong
+		if (
+			!empty($min_version) &&
+			!preg_match("/^\d{1,2}(\.\d{1,2})?(\.\d{1,2})?$/", $min_version)
+		) {
+			return false;
+		}
+		// max is only chcked if it is set
+		if (
+			!empty($max_version) &&
+			!preg_match("/^\d{1,2}(\.\d{1,2})?(\.\d{1,2})?$/", $max_version)
+		) {
+			return false;
+		}
+		// split up the version strings to calc the compare number
+		if (!empty($min_version)) {
+			$version = explode('.', $min_version);
+			$min_version = (int)$version[0] * 10000 + (int)($version[1] ?? 0) * 100 + (int)($version[2] ?? 0);
+		}
+		if (!empty($max_version)) {
+			$version = explode('.', $max_version);
+			$max_version = (int)$version[0] * 10000 + (int)($version[1] ?? 0) * 100 + (int)($version[2] ?? 0);
+			// drop out if min is bigger max, equal size is okay, that would be only THIS
+			if (!empty($min_version) && $min_version > $max_version) {
+				return false;
+			}
+		}
+		// set the php version id
+		if (!defined('PHP_VERSION_ID')) {
+			$version = explode('.', phpversion() ?: '');
+			// creates something like 50107
+			define('PHP_VERSION_ID', (int)$version[0] * 10000 + (int)$version[1] * 100 + (int)$version[2]);
+		}
+		// check if matching for version
+		if (
+			!empty($min_version) && empty($max_version) &&
+			PHP_VERSION_ID >= $min_version
+		) {
+			return true;
+		} elseif (
+			empty($min_version) && !empty($max_version) &&
+			PHP_VERSION_ID <= $max_version
+		) {
+			return true;
+		} elseif (
+			!empty($min_version) && !empty($max_version) &&
+			PHP_VERSION_ID >= $min_version && PHP_VERSION_ID <= $max_version
+		) {
+			return true;
+		}
+		// if no previous return, fail
+		return false;
+	}
+}
+
+// __END__