EnsureDirectory exists

function ensureDirectoryExists($filePath){

	//echo "Check whether $filePath has a valid directory";

	$pathSegments = array();

	$slashPosition = 0;
	$finished = false;

	while($finished === false){

		$slashPosition = mb_strpos($filePath, '/', $slashPosition + 1);

		if($slashPosition === false ){
			$finished = true;
		}
		else{
			$pageSegments[] = mb_substr($filePath, 0, $slashPosition);
		}

		if(	count($pageSegments) > 10){
			$finished = false;
		}
	}

	foreach($pageSegments as $segment){
		//echo "check $segment<br/>";

		if(file_exists($segment) === false){
			//echo "Had to create directory $segment";
			$result = mkdir($segment);

			if($result == false){
				logToFileFatal("Failed to create segment [$segment] in ensureDirectoryExists($filePath).");
				return false;
			}
		}
	}

	return true;
}