how to fix Warning: preg_match()
<p>I have the below scripts and they give me this warning.</p>

<pre><code>( ! ) Warning: preg_match() [&lt;a href='function.preg-match'&gt;function.preg-match&lt;/a&gt;]: Unknown modifier ']'
</code></pre>

<p>This is my code:</p>

<pre><code>if ((preg_match("&lt;[^&gt;]*script*\"?[^&gt;]*&gt;", $check_url)) || (preg_match("&lt;[^&gt;]*object*\"?[^&gt;]*&gt;", $check_url)) ||
    (preg_match("&lt;[^&gt;]*iframe*\"?[^&gt;]*&gt;", $check_url)) || (preg_match("&lt;[^&gt;]*applet*\"?[^&gt;]*&gt;", $check_url)) ||
    (preg_match("&lt;[^&gt;]*meta*\"?[^&gt;]*&gt;", $check_url)) || (preg_match("&lt;[^&gt;]*style*\"?[^&gt;]*&gt;", $check_url)) ||
    (preg_match("&lt;[^&gt;]*form*\"?[^&gt;]*&gt;", $check_url)) || (preg_match("\([^&gt;]*\"?[^)]*\)", $check_url)) ||
    (preg_match("\"", $check_url))) {
die ();
</code></pre>

<p>How can I fix this?</p>
