Update PHP Version check during Setup.

Hubzilla 4.0 requires PHP7. The oldest still supported PHP branch is 7.1.
So check during Setup for PHP >= 7.1.

Zotlabs/Module/Setup.php

@@ -39,7 +39,7 @@ class Setup extends \Zotlabs\Web\Controller {
 		ini_set('display_errors', '1');
 
 		// $baseurl/setup/testrewrite to test if rewrite in .htaccess is working
-		if (argc() == 2 && argv(1) == "testrewrite") {
+		if(argc() == 2 && argv(1) == 'testrewrite') {
 			echo 'ok';
 			killme();
 		}
@@ -63,7 +63,6 @@ class Setup extends \Zotlabs\Web\Controller {
 				return;
 				// implied break;
 			case 3:
-				$urlpath = \App::get_path();
 				$dbhost = trim($_POST['dbhost']);
 				$dbport = intval(trim($_POST['dbport']));
 				$dbuser = trim($_POST['dbuser']);
@@ -89,7 +88,6 @@ class Setup extends \Zotlabs\Web\Controller {
 				return;
 				// implied break;
 			case 4:
-				$urlpath = \App::get_path();
 				$dbhost = trim($_POST['dbhost']);
 				$dbport = intval(trim($_POST['dbport']));
 				$dbuser = trim($_POST['dbuser']);
@@ -162,7 +160,6 @@ class Setup extends \Zotlabs\Web\Controller {
 	 *
 	 * @return string parsed HTML output
 	 */
-
 	function get() {
 
 		$o = '';
@@ -213,10 +210,10 @@ class Setup extends \Zotlabs\Web\Controller {
 		}
 
 		if(x(\App::$data, 'txt') && strlen(\App::$data['txt'])) {
-			$db_return_text .= $this->manual_config($a);
+			$db_return_text .= $this->manual_config();
 		}
 
-		if ($db_return_text != "") {
+		if($db_return_text != '') {
 			$tpl = get_markup_template('install.tpl');
 			return replace_macros($tpl, array(
 				'$title' => $install_title,
@@ -278,7 +275,6 @@ class Setup extends \Zotlabs\Web\Controller {
 				$dbtype = intval(trim($_POST['dbtype']));
 				$phpath = trim($_POST['phpath']);
 				$adminmail = trim($_POST['adminmail']);
-				$siteurl = trim($_POST['siteurl']);
 
 				$tpl = get_markup_template('install_db.tpl');
 				$o .= replace_macros($tpl, array(
@@ -320,7 +316,6 @@ class Setup extends \Zotlabs\Web\Controller {
 				$phpath = trim($_POST['phpath']);
 
 				$adminmail = trim($_POST['adminmail']);
-				$siteurl = trim($_POST['siteurl']);
 				$timezone = ((x($_POST,'timezone')) ? ($_POST['timezone']) : 'America/Los_Angeles');
 
 
@@ -363,12 +358,12 @@ class Setup extends \Zotlabs\Web\Controller {
 	 * @param string $help optional help string
 	 */
 	function check_add(&$checks, $title, $status, $required, $help = '') {
-		$checks[] = array(
+		$checks[] = [
 			'title'    => $title,
 			'status'   => $status,
 			'required' => $required,
 			'help'     => $help
-		);
+		];
 	}
 
 	/**
@@ -380,8 +375,8 @@ class Setup extends \Zotlabs\Web\Controller {
 	function check_php(&$phpath, &$checks) {
 		$help = '';
 
-		if(version_compare(PHP_VERSION, '5.5') < 0) {
+		if(version_compare(PHP_VERSION, '7.1') < 0) {
-			$help .= t('PHP version 5.5 or greater is required.');
+			$help .= t('PHP version 7.1 or greater is required.');
 			$this->check_add($checks, t('PHP version'), false, false, $help);
 		}
 
@@ -419,6 +414,7 @@ class Setup extends \Zotlabs\Web\Controller {
 				$result = trim(shell_exec($cmd));
 			else
 				$help .= t('Unable to check command line PHP, as shell_exec() is disabled. This is required.') . EOL;
+
 			$passed2 = (($result == $str) ? true : false);
 			if(!$passed2) {
 				$help .= t('The command line version of PHP on your system does not have "register_argc_argv" enabled.'). EOL;
@@ -666,7 +662,6 @@ class Setup extends \Zotlabs\Web\Controller {
 					$help .= t('If your certificate is not recognized, members of other sites (who may themselves have valid certificates) will get a warning message on their own site complaining about security issues.') . EOL;
 					$help .= t('This can cause usability issues elsewhere (not just on your own site) so we must insist on this requirement.') .EOL;
 					$help .= t('Providers are available that issue free certificates which are browser-valid.'). EOL;
-
 					$help .= t('If you are confident that the certificate is valid and signed by a trusted authority, check to see if you have failed to install an intermediate cert. These are not normally required by browsers, but are required for server-to-server communications.') . EOL;
 
 					$this->check_add($checks, t('SSL certificate validation'), false, true, $help);
@@ -687,10 +682,9 @@ class Setup extends \Zotlabs\Web\Controller {
 	/**
 	 * @brief
 	 *
-	 * @param App &$a
 	 * @return string with paresed HTML
 	 */
-	function manual_config(&$a) {
+	function manual_config() {
 		$data = htmlspecialchars(\App::$data['txt'], ENT_COMPAT, 'UTF-8');
 		$o = t('The database configuration file ".htconfig.php" could not be written. Please use the enclosed text to create a configuration file in your web server root.');
 		$o .= "<textarea rows=\"24\" cols=\"80\" >$data</textarea>";
@@ -707,7 +701,12 @@ class Setup extends \Zotlabs\Web\Controller {
 		}
 	}
 
-
+	/**
+	 * @brief Executes the SQL install script and create database tables.
+	 *
+	 * @param dba_driver $db (unused)
+	 * @return boolean|string false on success or error message as string
+	 */
 	function load_database($db) {
 		$str = file_get_contents(\DBA::$dba->get_install_script());
 		$arr = explode(';', $str);
@@ -767,7 +766,7 @@ class Setup extends \Zotlabs\Web\Controller {
 	/**
 	 * @brief
 	 *
-	 * @param unknown $v
+	 * @param array $v
 	 * @param array $c
 	 * @return array
 	 */