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By: dashohoxha
The HTML syntax offers a possibility to take out the JavaScript code and
the CSS code in separate files. It is like this:
<script language="javascript" src="file.js"></script>
<link rel="stylesheet" href="file.css" type="text/css" />
However there is no standard way to clearly separate the HTML, PHP and
SQL codes. You can try to keep the degree of mixing of HTML and PHP code
at a minimum level by carefully designing the application. E.g. you
can place all the PHP code unrelated to the HTML generation (the code
that contains the logic of the application) in a separate file and keep
the file that generates the HTML page as lean as possible. E.g.:
<?php
include "app_logic.php";
$title = ...;
. . . . .
?>
<html>
<head>
<title><? echo $title ?></title>
</head>
<body>
. . . . .
</body>
</html>
This does not solve the problem completely, however. First, you still
have some PHP code inside the HTML page. Second, the 'HTML' file has the
extenssion ".php", which deceives some editors and they colorize it
wrongly.
A better soluttion to separate the HTML and PHP codes is to use a
templating engine. It uses templates for generating the final HTML
page. Each template is a pure HTML file, which also has some slots
or variables in it. The values of these variables are calculated by
the PHP code and they are passed to the engine. Then the engine
reads the templates, replaces the variables by their values and thus
generates an HTML page which is sent to the browser.
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