--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/includes/install.mysql.inc	Tue Dec 23 14:28:28 2008 +0100
@@ -0,0 +1,117 @@
+<?php
+// $Id: install.mysql.inc,v 1.9 2008/01/23 09:59:29 goba Exp $
+
+// MySQL specific install functions
+
+/**
+ * Check if MySQL is available.
+ *
+ * @return
+ *  TRUE/FALSE
+ */
+function mysql_is_available() {
+  return function_exists('mysql_connect');
+}
+
+/**
+ * Check if we can connect to MySQL.
+ *
+ * @return
+ *  TRUE/FALSE
+ */
+function drupal_test_mysql($url, &$success) {
+  if (!mysql_is_available()) {
+    drupal_set_message(st('PHP MySQL support not enabled.'), 'error');
+    return FALSE;
+  }
+
+  $url = parse_url($url);
+
+  // Decode url-encoded information in the db connection string.
+  $url['user'] = urldecode($url['user']);
+  $url['pass'] = isset($url['pass']) ? urldecode($url['pass']) : '';
+  $url['host'] = urldecode($url['host']);
+  $url['path'] = urldecode($url['path']);
+
+  // Allow for non-standard MySQL port.
+  if (isset($url['port'])) {
+    $url['host'] = $url['host'] .':'. $url['port'];
+  }
+
+  // Test connecting to the database.
+  $connection = @mysql_connect($url['host'], $url['user'], $url['pass'], TRUE, 2);
+  if (!$connection) {
+    drupal_set_message(st('Failed to connect to your MySQL database server. MySQL reports the following message: %error.<ul><li>Are you sure you have the correct username and password?</li><li>Are you sure that you have typed the correct database hostname?</li><li>Are you sure that the database server is running?</li></ul>For more help, see the <a href="http://drupal.org/node/258">Installation and upgrading handbook</a>. If you are unsure what these terms mean you should probably contact your hosting provider.', array('%error' => mysql_error())), 'error');
+    return FALSE;
+  }
+
+  // Test selecting the database.
+  if (!mysql_select_db(substr($url['path'], 1))) {
+    drupal_set_message(st('Failed to select your database on your MySQL database server, which means the connection username and password are valid, but there is a problem accessing your data. MySQL reports the following message: %error.<ul><li>Are you sure you have the correct database name?</li><li>Are you sure the database exists?</li><li>Are you sure the username has permission to access the database?</li></ul>For more help, see the <a href="http://drupal.org/node/258">Installation and upgrading handbook</a>. If you are unsure what these terms mean you should probably contact your hosting provider.', array('%error' => mysql_error())), 'error');
+    return FALSE;
+  }
+
+  $success = array('CONNECT');
+
+  // Test CREATE.
+  $query = 'CREATE TABLE drupal_install_test (id int NULL)';
+  $result = mysql_query($query);
+  if ($error = mysql_error()) {
+    drupal_set_message(st('Failed to create a test table on your MySQL database server with the command %query. MySQL reports the following message: %error.<ul><li>Are you sure the configured username has the necessary MySQL permissions to create tables in the database?</li></ul>For more help, see the <a href="http://drupal.org/node/258">Installation and upgrading handbook</a>. If you are unsure what these terms mean you should probably contact your hosting provider.', array('%query' => $query, '%error' => $error)), 'error');
+    return FALSE;
+  }
+  $err = FALSE;
+  $success[] = 'SELECT';
+  $success[] = 'CREATE';
+
+  // Test INSERT.
+  $query = 'INSERT INTO drupal_install_test (id) VALUES (1)';
+  $result = mysql_query($query);
+  if ($error = mysql_error()) {
+    drupal_set_message(st('Failed to insert a value into a test table on your MySQL database server. We tried inserting a value with the command %query and MySQL reported the following error: %error.', array('%query' => $query, '%error' => $error)), 'error');
+    $err = TRUE;
+  }
+  else {
+    $success[] = 'INSERT';
+  }
+
+  // Test UPDATE.
+  $query = 'UPDATE drupal_install_test SET id = 2';
+  $result = mysql_query($query);
+  if ($error = mysql_error()) {
+    drupal_set_message(st('Failed to update a value in a test table on your MySQL database server. We tried updating a value with the command %query and MySQL reported the following error: %error.', array('%query' => $query, '%error' => $error)), 'error');
+    $err = TRUE;
+  }
+  else {
+    $success[] = 'UPDATE';
+  }
+
+  // Test DELETE.
+  $query = 'DELETE FROM drupal_install_test';
+  $result = mysql_query($query);
+  if ($error = mysql_error()) {
+    drupal_set_message(st('Failed to delete a value from a test table on your MySQL database server. We tried deleting a value with the command %query and MySQL reported the following error: %error.', array('%query' => $query, '%error' => $error)), 'error');
+    $err = TRUE;
+  }
+  else {
+    $success[] = 'DELETE';
+  }
+
+  // Test DROP.
+  $query = 'DROP TABLE drupal_install_test';
+  $result = mysql_query($query);
+  if ($error = mysql_error()) {
+    drupal_set_message(st('Failed to drop a test table from your MySQL database server. We tried dropping a table with the command %query and MySQL reported the following error %error.', array('%query' => $query, '%error' => $error)), 'error');
+    $err = TRUE;
+  }
+  else {
+    $success[] = 'DROP';
+  }
+
+  if ($err) {
+    return FALSE;
+  }
+
+  mysql_close($connection);
+  return TRUE;
+}