// Validate numeric input

function isnum($value) {

	if (!is_array($value)) {

		return (preg_match("/^[0-9]+$/", $value));

	} else {

		return false;

	}

}

// Strip Input Function, prevents <span style="border-bottom: 1px dotted black;">HTML</span> in unwanted places

function stripinput($text) {

	if (!is_array($text)) {

		$text = stripslash(trim($text));

		//$text = preg_replace("/&[^#0-9]/", "&amp;", $text)

		$search = array("&", "\"", "'", "\\", '\"', "\'", "<", ">", "&nbsp;");

		$replace = array("&amp;", "&quot;", "'", "\", "&quot;", "'", "&lt;", "&gt;", " ");

		$text = preg_replace("/(&amp;)+(?=\#([0-9]{2,3});)/i", "&", str_replace($search, $replace, $text));

	} else {

		foreach ($text as $key => $value) {

			$text[$key] = stripinput($value);

		}

	}

	return $text;

}

 

// Prevent any possible XSS attacks via $_GET.

function stripget($check_url) {

	$return = false;

	if (is_array($check_url)) {

		foreach ($check_url as $value) {

			if (stripget($value) == true) { 

				return true;

			}

		}

	} else {

		$check_url = str_replace(array("\"", "\'"), array("", ""), urldecode($check_url));

		if (preg_match("/<[^<>]+>/i", $check_url)) { 

			return true;

		}

	}

	return $return;

}