Source of: /manual/en/security.magicquotes.what.php
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<div id="security.magicquotes.what" class="sect1">
<h2 class="title">What are Magic Quotes</h2>
<p class="para">
When on, all <i>'</i> (single-quote), <i>"</i>
(double quote), <i>\</i> (backslash) and <i>NULL</i>
characters are escaped with a backslash automatically. This is identical
to what <a href="function.addslashes.php" class="function">addslashes()</a> does.
</p>
<p class="para">
There are three magic quote directives:
</p>
<ul class="itemizedlist">
<li class="listitem">
<span class="simpara">
<a href="info.configuration.php#ini.magic-quotes-gpc" class="link">magic_quotes_gpc</a>
</span>
<span class="simpara">
Affects HTTP Request data (GET, POST, and COOKIE). Cannot be set at
runtime, and defaults to <em class="emphasis">on</em> in PHP.
</span>
<span class="simpara">
See also <a href="function.get-magic-quotes-gpc.php" class="function">get_magic_quotes_gpc()</a>.
</span>
</li>
<li class="listitem">
<span class="simpara">
<a href="info.configuration.php#ini.magic-quotes-runtime" class="link">magic_quotes_runtime</a>
</span>
<span class="simpara">
If enabled, most functions that return data from an external source,
including databases and text files, will have quotes escaped with a
backslash. Can be set at runtime, and defaults to <em class="emphasis">off</em>
in PHP.
</span>
<span class="simpara">
See also <a href="function.set-magic-quotes-runtime.php" class="function">set_magic_quotes_runtime()</a> and
<a href="function.get-magic-quotes-runtime.php" class="function">get_magic_quotes_runtime()</a>.
</span>
</li>
<li class="listitem">
<span class="simpara">
<a href="sybase.configuration.php#ini.magic-quotes-sybase" class="link">magic_quotes_sybase</a>
</span>
<span class="simpara">
If enabled, a single-quote is escaped with a single-quote instead of a
backslash. If on, it completely overrides
<a href="info.configuration.php#ini.magic-quotes-gpc" class="link">magic_quotes_gpc</a>. Having
both directives enabled means only single quotes are escaped as
<i>''</i>. Double quotes, backslashes and NULL's will
remain untouched and unescaped.
</span>
<span class="simpara">
See also <a href="function.ini-get.php" class="function">ini_get()</a> for retrieving its value.
</span>
</li>
</ul>
</div><?php manual_footer(); ?>
