Show helpful error message if php-mbstring is not installed

diff --git a/inc/common.php b/inc/common.php
index fe3ec72652f704ce11bce637f7677187f8d4894f..042fe3c4f568ccefbc0dafc56f7982bc09394a75 100644 (file)
--- a/inc/common.php
+++ b/inc/common.php
@@ -1,11 +1,22 @@
 <?php
 if (version_compare(PHP_VERSION, '8.0.0', '<'))
+{
        die("This webserver is using PHP version ".PHP_VERSION." but we require at least PHP 8.0.0.<br>".
            "If you already installed PHP8 but are still seeing this error, then it means ".
            "apache/nginx/.. is loading an older PHP version. Eg. on Debian/Ubuntu you need ".
            "<code>apt-get install libapache2-mod-php8.2</code> (or a similar version) and ".
            "<code>apt-get remove libapache2-mod-php7.4</code> (or a similar version). ".
            "You may also need to choose again the PHP module to load in apache via <code>a2enmod php8.2</code>");
+}
+
+$loaded_extensions = get_loaded_extensions();
+if (!in_array("mbstring", $loaded_extensions))
+{
+       die("The PHP module 'mbstrings' need to be loaded. ".
+           "You need to install the php-mbstring package and restart the webserver.<br>".
+           "If you are on Debian/Ubuntu then run <code>apt-get install php-mbstring</code> ".
+           "and restart your webserver (apache2/nginx/..).");
+}
 
 define('UPATH', dirname(__DIR__));