The default PHP version is v4, therefore the installation process cannot be started immediately after uploading the GetSimple files to the webspace. If you try to start the installation by visiting the web address, an error similar to the following will appear in the browser:
Parse error: syntax error, unexpected '&', expecting T_VARIABLE or '$'in <hosting address>/admin/inc/common.php on line 19

It is necessary to set the PHP version in a .htaccess file in the root of your webspace (normally the 'www' folder) before installation can be started. This file should contain the line:
SetEnv PHP_VER 5

As the temporary .htaccess file will be overwritten by the GetSimple installation, it is also necessary to add that line manually to the permanent file, by either:

• editing the temp.htaccess file before installing GetSimple, or
• editing the .htaccess file after installation.

Other sub-versions of PHP can also be specified. More information is in the OVH guide (French language, but easily understandable).