Filter special characters
<p>I want to check if a string has some special characters and remove them.</p>

<p>How can I add backslash <code>\</code> and slash <code>/</code> and <code>~|%*|'</code>,<code>#</code>, <code>""</code> to check all special characters</p>

<p>I need something like</p>

<pre><code>preg_match('/\\\\/', $string);
</code></pre>

<p>Can you help me?</p>

<p>Thanks</p>
