function _moveToPrevChar(&$contentctr, &$charctr, $content)
	{
		$lastchar = false;
		$charctr--;
		while ($charctr < 0) { // go back to previous $content[]
			$contentctr--;
			if ($contentctr < 0) {
				return false;
			}
			if ($this->usingCoreFont) {
				$charctr = strlen($content[$contentctr]) - 1;
			} else {
				$charctr = mb_strlen($content[$contentctr], $this->mb_enc) - 1;
			}
		}
		if ($this->usingCoreFont) {
			$lastchar = $content[$contentctr][$charctr];
		} else {
			$lastchar = mb_substr($content[$contentctr], $charctr, 1, $this->mb_enc);
		}
		return $lastchar;
	}