How can PHP developers troubleshoot issues related to FCKeditor not displaying in specific textareas on a webpage?

To troubleshoot issues related to FCKeditor not displaying in specific textareas on a webpage, PHP developers can check if the textarea has the correct class or ID linked to FCKeditor initialization. They can also inspect the browser console for any JavaScript errors that might be preventing FCKeditor from loading properly. Additionally, ensuring that the FCKeditor script is properly included in the webpage and that there are no conflicts with other JavaScript libraries can help resolve the issue.

<script type="text/javascript">
    var editor = new FCKeditor('textarea_id');
    editor.BasePath = '/fckeditor/';
    editor.ReplaceTextarea();
</script>