What is the main issue the user is facing with the FCK-Editor and PHP integration?

The main issue the user is facing with the FCK-Editor and PHP integration is that the editor is not displaying properly or functioning as expected when integrated with PHP. To solve this issue, make sure that the editor is properly initialized with the correct configuration settings and that the PHP code is properly handling the editor's input and output.

// Initialize FCKEditor with correct configuration settings
$oFCKeditor = new FCKeditor('FCKeditor');
$oFCKeditor->BasePath = '/fckeditor/';
$oFCKeditor->Value = 'Default text';
$oFCKeditor->Create();

// Handle input from the editor
$content = $_POST['FCKeditor'];

// Output the content from the editor
echo $content;