function extractBetween($string, $begin, $end){
		if ( false === ($smallString = strstr($string, $begin)) ){
			return false;
		}
		
		$smallString = ltrim($smallString, $begin);
		
		if ( false === ($endPos = strpos($smallString, $end)) ){
			return false;
		}
		
		return substr($smallString, 0, $endPos);
	} # end function

	$content = "<!--Start-->
	Test<br />
	Test<br />
	Test
	<!--End-->Test";
	
	echo extractBetween($content, '<!--Start-->', '<!--End-->');