note 4326 modified in function.preg-match by irc-html

If you want to use some of PHP's special characters in your expression, such as $, you must escape it twice. For example: $matchme = "\$example"; if (preg_match("/\$example/", $matchme)) { will not be matched because PHP interprets the \$ and passes it as $. Instead, you must do this: if (preg_match("/\\\$example/", $matchme)) { --was-- If you want to use some of PHP's special characters in your expression, such as $, you must escape it twice. For example: <PRE>$matchme = "\$example"; if (preg_match("/\$example/", $matchme)) {</PRE> will not be matched because PHP interprets the \$ and passes it as $. Instead, you must do this: <PRE>if (preg_match("/\\\$example/", $matchme)) {</PRE> http://www.php.net/manual/en/function.preg-match.php