インストールについてのよくある質問

Contents:

コンピューターへのインストール

LimeSurveyは、MAMP/XAMPPまたは他のシステムを使用してコンピューターにインストールすることもできます。ただし、このコンピューターはウェブサーバーではないので、ウェブ経由で他のユーザーがアクセスすることはできません。

アンケートをウェブ経由で他のユーザーがアクセスできるようにするには、次のいずれかを行う必要があります。

• サーバーまたはホストプロバイダーからウェブスペースを用意する
• LimeSurveyに特化したホストプロバイダーを探す

  コンピューターにインストールしても、アンケートをインターネット上で共有することはできません。

インストールの開始

MySQLでコマンドラインアクセスによってデータベースとユーザーを作成するにはどうすればよいですか？

以下のコマンドをMySQLに入力します。

• create database <your_database_name>;

• create user <your_database_username>;

• create user <your_database_username>@localhost;

• set password for <your_database_username> = PASSWORD('<your_database_password>');

• set password for <your_database_username>@localhost = PASSWORD('<your_database_password>');

• grant all on <your_database_name>.* to '<your_database_username>';

• grant all on <your_database_name>.* to '<your_database_username>'@'localhost';

ターミナルでは、 <your_database_name>、<your_database_username>、<your_database_password>の部分は適切な値に置き換えます。

スクリプトでデータベースを作成できない場合はどうすればよいですか？

Normally, the script creates a new database, and then the table structure. However, if your server/ISP doesn't give you admin rights to create a new database in MySQL, you will need to contact your server administrator to get the necessary database created (or create it yourself if you receive the required permissions). The newly created blank database should include the appropriate access rights (i.e.: read/write/create). Then, you should be able start the LimeSurvey installation, which will create the tables within the newly created database.

Blank page when accessing the install page

This problem doesn't occur within the LimeSurvey installation but within the PHP installation.

• Verify you have the MySQL PHP module (php-mysql) installed.
• Verify your PHP install is loading the PHP.ini file your are modifying and not parsing other PHP.INI files on your system.
• Verify the location and permissions of the following setting in your PHP.ini:

upload_tmp_dir="/temp"

session.save_path="/temp"

• Verify that your server runs a suitable PHP version.

Error messages due to non-existing resources

Sometimes, files are not uploaded correctly or are broken during the upload process. This leads to several different error messages. Most of them refer to a file or function within a file which can't be found.

Solution: Re-upload all files using the binary mode of your FTP programme.

Requirements page

mbstring（マルチバイト文字列機能）ライブラリーとは何か？

mbstringライブラリとは、文字セットを他言語のものに変換するためのPHPのライブラリで、LimeSurveyを実行するのに必要となります。mbstringがすでにインストールされているかどうかを確認するには、ウェブブラウザーで以下のURLにアクセスします。

http://<your_server>/<your_limesurvey_directory>/admin/install/phpinfo.php

各種情報が表示されます。Configurationセクションにmbstringという文字列が見つかれば、正しくインストールされてており、LimeSurveyを利用できます。

If you don't find the mbstring section, you might have a problem on your hands. There are three possible scenarios:

• If it's your host provider's server, ask for the activation of that extension in PHP or for further information on how you can activate it - if you have a good administration panel for your server, you may be able to activate it yourself
• If it's your own Linux server, you may have to re-compile PHP and include the mbstring library. Ask the Linux experts how to do that. However, you can install it using your Linux package manager, which is mostly available in all the Linux distributions nowadays
  • If you are using a version of Linux that supports 'yum' (CentOS, RedHat, Fedora)...
    • ...use the terminal (as a super user) and type: yum install php-mbstring
    • ...make sure to update /etc/php.ini and uncomment the various mbstring params
    • ...make sure to restart apache after installing it: /etc/init.d/httpd restart
• If it's your own Windows server, search for php.ini on your system, open it with an editor, and search for mbstring. Most probably, the line that contains the string is commented out with a semicolon. Remove the semicolon, save and restart your web server

Stuck at checking file system permissions

If SELinux is activated (primarily on CentOS), then you might get an error that the file system permissions are not correct, even if the list of directories is empty. SELinux prevents writing even though the permissions are for example on 777 or 755. To configure SELinux correctly for your server - check out the SELinux documentation.

After database creation

Blank page after database creation

Symptoms

• LimeSurvey is installed correctly and the database was created, but instead of the admin page, you get an empty page
• Web server log shows "Fatal error: Call to a member function on a non-object in /path/to/limesurvey/admin/login_check.php on line 69"

Fix

This is probably related to an incorrect setting for $rooturl or $rootdir in config.php. The file config.php attempts to set $rootdir correctly by calling dirname('''FILE'''). While this usually works, it can be upset when LimeSurvey is installed in a user's home or public_html directory and the home directory is mounted over NFS. To set up the $rootdir manually, (your shell or pwd command may show you a path like /disks/hostname/home/username/public_html/limesurvey), try using /home/username/public_html/limesurvey.

When accessing the admin page, the browser keeps running and will eventually fail to show it

Symptoms

• LimeSurvey is installed correctly and the database was created. However, when you access the admin page, the browser keeps running and will eventually fail to show the page
• When you check the web server access log, its size has become quite big (in some cases, more than 2 GB)
• Inside the access log, you get this message filling the log:

  fread() [function.fread]: Length parameter must be greater than 0 in /limesurvey/classes/php-gettext/streams.php on line 120.

The line number may be different depending on your LimeSurvey version.

Fix

This may be caused by the mbstring.func_overload setting. Change the following setting in the php.ini file:

mbstring.func_overload = 0

This means no function overloading. See the PHP manual for this setting: Function Overloading Feature.

When accessing the admin page, the browser reports Fatal error: Call to a member function gT() on a non-object in login_check.php on line 76

Symptoms

• LimeSurvey is installed correctly and the database was created. But when redirected to the admin page, the browser displayed the listed error.
• $rootdir and $rooturl are correctly set in config.php.
• The disk path name for limesurvey installation directory includes one of the following characters: '(',')' or '+'.

  Other characters may also induce the same behavior.

Fix

Move/rename the LimeSurvey installation directory so that the path name includes non of the following characters: '(',')' or '+' characters.

After installation

For all the other issues that may occur after a successful installation, please refer to the troubleshooting page.