1. Download the latest version of TinyMCE SDK
https://www.tiny.cloud/get-tiny/
2. Extract the folder [tinymce] and put in your application root folder.
eg: C:\xampp\htdocs\tinymcedemo\tinymce [tinymcedemo is the root folder]
3. Create a php file "test.php" and place the below code
<!DOCTYPE html>
<html>
<head>
<script src="tinymce/tinymce.min.js"></script>
<script type="text/javascript">
tinymce.init({
selector: '#mytextarea'
});
</script>
</head>
<body>
<h1>TinyMCE </h1>
<form method="post">
<textarea id="mytextarea"></textarea>
</form>
</body>
</html>
<html>
<head>
<script src="tinymce/tinymce.min.js"></script>
<script type="text/javascript">
tinymce.init({
selector: '#mytextarea'
});
</script>
</head>
<body>
<h1>TinyMCE </h1>
<form method="post">
<textarea id="mytextarea"></textarea>
</form>
</body>
</html>