How can PHP developers ensure that text formatting options are correctly displayed and functional within a WYSIWYG editor on a website?

To ensure that text formatting options are correctly displayed and functional within a WYSIWYG editor on a website, PHP developers can use a library like CKEditor or TinyMCE. These libraries provide rich text editing capabilities and can be easily integrated into web applications. By configuring the editor settings and enabling the desired text formatting options, developers can ensure that users can apply styles such as bold, italic, underline, and more within the editor.

<!DOCTYPE html>
<html>
<head>
    <script src="https://cdn.ckeditor.com/4.16.2/standard/ckeditor.js"></script>
</head>
<body>
    <textarea name="editor1"></textarea>
    <script>
        CKEDITOR.replace('editor1', {
            toolbar: [
                { name: 'basicstyles', items: ['Bold', 'Italic', 'Underline', 'Strike'] },
                { name: 'styles', items: ['Format'] }
            ]
        });
    </script>
</body>
</html>