Fatal error: Call-time pass-by-reference
<p>I'm getting this error on the commented line. Any idea why?</p>

<pre><code>Fatal error: Call-time pass-by-reference has been removed in myfile.php on line 301
Call Stack
#   Time    Memory  Function    Location
1   0.0002  245352  {main}( )   ../plugins.php:0
2   0.3016  7149968 plugin_sandbox_scrape( )    ../plugins.php:156
</code></pre>

<p>Code is below...</p>

<pre><code>function rseo_doTheParse($tag, $post){
    //headings
    $keyword = rseo_sanitize3(trim(strtolower(rseo_getKeyword($post))));
    $content = rseo_sanitize3($post-&gt;post_content);
    $match = 0;

            $token = '/&lt;'.$tag.'[^&gt;]*&gt;(.*\b'.$keyword.'\b.*)&lt;\/'.$tag.'&gt;/siU';
            if(preg_match($token, &amp;$content, $matches)) //THIS IS LINE 301
            {
                $match = 1;
            }
            return $match;
        }
</code></pre>
