How I can write html code (not executable) to a file by using php filesystems. For example I want to put my html page template which includes DOCTYPE, HEADER, BODY BLOCK, FOOTER etc.
as i got you question
save file index.php instead off index.html.
inside you can use
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
</head>
<body>
</body>
</html>
when ever you need to write a php(inside body)
use
<?php
//php code goes here
?>
example
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
</head>
<body>
<?php
//php code goes here
?>
</body>
</html>
php will work when file extension is .php. if file extension is .html browser will not recognize your PHP code and it shows complete code on browser