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<h1>Server-side Scripting Primer</h1>
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<p class="intro">An HTML file can contain text, HTML tags and scripts.</p>
<p class="intro">Scripts in an HTML file can be executed on the Web server.</p>
<hr />
<h2>Server-side Scripting</h2>
<p>Server-side scripting is about "programming" the behavior of the
server. This is called server-side scripting or server scripting.</p>
<p>Client-side scripting is about "programming" the behavior of the
browser. (see Web JavaScript chapter).</p>
<hr />
<h2>What is Server-side Scripting?</h2>
<p>Normally when a browser requests an HTML file, the server returns the file,
but if the file contains a server-side script, the script inside the HTML file
is executed by the server before the file is returned to the browser as plain HTML.</p>
<hr />
<h2>What can Server Scripts Do?</h2>
<ul>
<li>Dynamically edit, change or add any content to a Web page</li>
<li>Respond to user queries or data submitted from HTML forms</li>
<li>Access any data or databases and return the results to a browser</li>
<li>Customize a Web page to make it more
useful for individual users</li>
<li>Provide security since your server code cannot be viewed from a browser</li>
</ul>
<p><b>Important:</b> Because the scripts are executed on the server,
the browser that displays the ASP/PHP file does not need to support scripting at
all!</p>
<hr />
<h2>ASP and PHP</h2>
<p>At W3Schools we demonstrate server-side scripting by using <b>Active Server Pages
(ASP)</b> and <b>Hypertext Preprocessor (PHP)</b>.</p>
<p>You cannot view the ASP or PHP source code by selecting "View source" in a browser, you will
only see the output from the server, which is plain HTML. This is because the scripts
are executed on the server before the result is sent back to the browser as
plain HTML.</p>
<p>However, the examples below display the
hidden source code. This will make it easier for you to understand how it works.</p>
<hr />
<h2>ASP Examples </h2>
<p>
<a target="_blank" href="../asp/showasp.asp@filename=demo_text">Write text with ASP</a><br />
How to write text with ASP.
</p>
<p>
<a target="_blank" href="../asp/showasp.asp@filename=demo_formatting">Add some HTML to the text</a><br />
How to format the text with HTML tags.
</p>
<hr />
<h2>Scripting Tutorials </h2>
<p>Study our <a href="../asp/default.asp">Complete ASP tutorial</a>, or
our <a href="../php/default.asp">Complete PHP tutorial</a>.</p>
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