--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/installer/check.php	Thu Jan 04 15:52:31 2018 -0500
@@ -0,0 +1,274 @@
+<?php
+
+if (!class_exists('rcmail_install', false) || !is_object($RCI)) {
+    die("Not allowed! Please open installer/index.php instead.");
+}
+
+?>
+<form action="index.php" method="get">
+<?php
+
+$required_php_exts = array(
+    'PCRE'      => 'pcre',
+    'DOM'       => 'dom',
+    'Session'   => 'session',
+    'XML'       => 'xml',
+    'JSON'      => 'json',
+    'PDO'       => 'PDO',
+);
+
+$optional_php_exts = array(
+    'FileInfo'  => 'fileinfo',
+    'Libiconv'  => 'iconv',
+    'Multibyte' => 'mbstring',
+    'OpenSSL'   => 'openssl',
+    'Mcrypt'    => 'mcrypt',
+    'Intl'      => 'intl',
+    'Exif'      => 'exif',
+    'LDAP'      => 'ldap',
+);
+
+$required_libs = array(
+    'PEAR'      => 'pear.php.net',
+    'Auth_SASL' => 'pear.php.net',
+    'Net_SMTP'  => 'pear.php.net',
+    'Net_IDNA2' => 'pear.php.net',
+    'Mail_mime' => 'pear.php.net',
+);
+
+$optional_libs = array(
+    'Net_LDAP3' => 'git.kolab.org',
+);
+
+$ini_checks = array(
+    'file_uploads'                  => 1,
+    'session.auto_start'            => 0,
+    'mbstring.func_overload'        => 0,
+    'suhosin.session.encrypt'       => 0,
+    'magic_quotes_runtime'          => 0,
+    'magic_quotes_sybase'           => 0,
+);
+
+$optional_checks = array(
+    // required for utils/modcss.inc, should we require this?
+    'allow_url_fopen'  => 1,
+    'date.timezone'    => '-VALID-',
+    'register_globals' => 0, // #1489157
+);
+
+$source_urls = array(
+    'Sockets'   => 'http://www.php.net/manual/en/book.sockets.php',
+    'Session'   => 'http://www.php.net/manual/en/book.session.php',
+    'PCRE'      => 'http://www.php.net/manual/en/book.pcre.php',
+    'FileInfo'  => 'http://www.php.net/manual/en/book.fileinfo.php',
+    'Libiconv'  => 'http://www.php.net/manual/en/book.iconv.php',
+    'Multibyte' => 'http://www.php.net/manual/en/book.mbstring.php',
+    'Mcrypt'    => 'http://www.php.net/manual/en/book.mcrypt.php',
+    'OpenSSL'   => 'http://www.php.net/manual/en/book.openssl.php',
+    'JSON'      => 'http://www.php.net/manual/en/book.json.php',
+    'DOM'       => 'http://www.php.net/manual/en/book.dom.php',
+    'Intl'      => 'http://www.php.net/manual/en/book.intl.php',
+    'Exif'      => 'http://www.php.net/manual/en/book.exif.php',
+    'oci8'      => 'http://www.php.net/manual/en/book.oci8.php',
+    'PDO'       => 'http://www.php.net/manual/en/book.pdo.php',
+    'LDAP'      => 'http://www.php.net/manual/en/book.ldap.php',
+    'pdo_mysql'   => 'http://www.php.net/manual/en/ref.pdo-mysql.php',
+    'pdo_pgsql'   => 'http://www.php.net/manual/en/ref.pdo-pgsql.php',
+    'pdo_sqlite'  => 'http://www.php.net/manual/en/ref.pdo-sqlite.php',
+    'pdo_sqlite2' => 'http://www.php.net/manual/en/ref.pdo-sqlite.php',
+    'pdo_sqlsrv'  => 'http://www.php.net/manual/en/ref.pdo-sqlsrv.php',
+    'pdo_dblib'   => 'http://www.php.net/manual/en/ref.pdo-dblib.php',
+    'PEAR'      => 'http://pear.php.net',
+    'Net_SMTP'  => 'http://pear.php.net/package/Net_SMTP',
+    'Mail_mime' => 'http://pear.php.net/package/Mail_mime',
+    'Net_IDNA2' => 'http://pear.php.net/package/Net_IDNA2',
+    'Net_LDAP3' => 'https://git.kolab.org/diffusion/PNL',
+);
+
+echo '<input type="hidden" name="_step" value="' . ($RCI->configured ? 3 : 2) . '" />';
+?>
+
+<h3>Checking PHP version</h3>
+<?php
+
+define('MIN_PHP_VERSION', '5.3.7');
+if (version_compare(PHP_VERSION, MIN_PHP_VERSION, '>=')) {
+    if (PHP_MAJOR_VERSION != 5) {
+        $RCI->fail('Version', 'PHP5 is required, ' . PHP_VERSION . ' detected');
+    }
+    else {
+        $RCI->pass('Version', 'PHP ' . PHP_VERSION . ' detected');
+    }
+}
+else {
+    $RCI->fail('Version', 'PHP Version ' . MIN_PHP_VERSION . ' or greater is required ' . PHP_VERSION . ' detected');
+}
+?>
+
+<h3>Checking PHP extensions</h3>
+<p class="hint">The following modules/extensions are <em>required</em> to run Roundcube:</p>
+<?php
+
+// get extensions location
+$ext_dir = ini_get('extension_dir');
+
+$prefix = (PHP_SHLIB_SUFFIX === 'dll') ? 'php_' : '';
+foreach ($required_php_exts as $name => $ext) {
+    if (extension_loaded($ext)) {
+        $RCI->pass($name);
+    } else {
+        $_ext = $ext_dir . '/' . $prefix . $ext . '.' . PHP_SHLIB_SUFFIX;
+        $msg = @is_readable($_ext) ? 'Could be loaded. Please add in php.ini' : '';
+        $RCI->fail($name, $msg, $source_urls[$name]);
+    }
+    echo '<br />';
+}
+
+?>
+
+<p class="hint">The next couple of extensions are <em>optional</em> and recommended to get the best performance:</p>
+<?php
+
+foreach ($optional_php_exts as $name => $ext) {
+    if (extension_loaded($ext)) {
+        $RCI->pass($name);
+    }
+    else {
+        $_ext = $ext_dir . '/' . $prefix . $ext . '.' . PHP_SHLIB_SUFFIX;
+        $msg = @is_readable($_ext) ? 'Could be loaded. Please add in php.ini' : '';
+        $RCI->na($name, $msg, $source_urls[$name]);
+    }
+    echo '<br />';
+}
+
+?>
+
+
+<h3>Checking available databases</h3>
+<p class="hint">Check which of the supported extensions are installed. At least one of them is required.</p>
+
+<?php
+
+$prefix = (PHP_SHLIB_SUFFIX === 'dll') ? 'php_' : '';
+foreach ($RCI->supported_dbs as $database => $ext) {
+    if (extension_loaded($ext)) {
+        $RCI->pass($database);
+        $found_db_driver = true;
+    }
+    else {
+        $_ext = $ext_dir . '/' . $prefix . $ext . '.' . PHP_SHLIB_SUFFIX;
+        $msg = @is_readable($_ext) ? 'Could be loaded. Please add in php.ini' : '';
+        $RCI->na($database, $msg, $source_urls[$ext]);
+    }
+    echo '<br />';
+}
+if (empty($found_db_driver)) {
+  $RCI->failures++;
+}
+
+?>
+
+
+<h3>Check for required 3rd party libs</h3>
+<p class="hint">This also checks if the include path is set correctly.</p>
+
+<?php
+
+foreach ($required_libs as $classname => $vendor) {
+    if (class_exists($classname)) {
+        $RCI->pass($classname);
+    }
+    else {
+        $RCI->fail($classname, "Failed to load class $classname from $vendor", $source_urls[$classname]);
+    }
+    echo "<br />";
+}
+
+foreach ($optional_libs as $classname => $vendor) {
+    if (class_exists($classname)) {
+        $RCI->pass($classname);
+    }
+    else {
+        $RCI->na($classname, "Recommended to install $classname from $vendor", $source_urls[$classname]);
+    }
+    echo "<br />";
+}
+
+?>
+
+<h3>Checking php.ini/.htaccess settings</h3>
+<p class="hint">The following settings are <em>required</em> to run Roundcube:</p>
+
+<?php
+
+foreach ($ini_checks as $var => $val) {
+    $status = ini_get($var);
+    if ($val === '-NOTEMPTY-') {
+        if (empty($status)) {
+            $RCI->fail($var, "empty value detected");
+        }
+        else {
+            $RCI->pass($var);
+        }
+    }
+    else if (filter_var($status, FILTER_VALIDATE_BOOLEAN) == $val) {
+        $RCI->pass($var);
+    }
+    else {
+      $RCI->fail($var, "is '$status', should be '$val'");
+    }
+    echo '<br />';
+}
+?>
+
+<p class="hint">The following settings are <em>optional</em> and recommended:</p>
+
+<?php
+
+foreach ($optional_checks as $var => $val) {
+    $status = ini_get($var);
+    if ($val === '-NOTEMPTY-') {
+        if (empty($status)) {
+            $RCI->optfail($var, "Could be set");
+        } else {
+            $RCI->pass($var);
+        }
+        echo '<br />';
+        continue;
+    }
+    if ($val === '-VALID-') {
+        if ($var == 'date.timezone') {
+            try {
+                $tz = new DateTimeZone($status);
+                $RCI->pass($var);
+            }
+            catch (Exception $e) {
+                $RCI->optfail($var, empty($status) ? "not set" : "invalid value detected: $status");
+            }
+        }
+        else {
+            $RCI->pass($var);
+        }
+    }
+    else if (filter_var($status, FILTER_VALIDATE_BOOLEAN) == $val) {
+        $RCI->pass($var);
+    }
+    else {
+      $RCI->optfail($var, "is '$status', could be '$val'");
+    }
+    echo '<br />';
+}
+?>
+
+<?php
+
+if ($RCI->failures) {
+  echo '<p class="warning">Sorry but your webserver does not meet the requirements for Roundcube!<br />
+            Please install the missing modules or fix the php.ini settings according to the above check results.<br />
+            Hint: only checks showing <span class="fail">NOT OK</span> need to be fixed.</p>';
+}
+echo '<p><br /><input type="submit" value="NEXT" ' . ($RCI->failures ? 'disabled' : '') . ' /></p>';
+
+?>
+
+</form>