diff --git a/lpdf.php b/lpdf.php
index a2ef6b0..11e79fa 100644
--- a/lpdf.php
+++ b/lpdf.php
@@ -512,6 +512,13 @@ class lpdf
 		pdf_show_xy($this->pdf,$text,$this->loc($xpos),$this->loc($this->yloc));
 	}
 
+	function stringWidth($text, $font=null, $size=null)
+	{
+		if($size == null) $size = pdf_get_value($this->pdf,"fontsize",0);
+		if($font == null) $font = $this->normalfont;
+		return pdf_stringwidth($this->pdf, $text, $font, $size);
+	}
+
 	function nextLine()
 	{
 		$fontsize=pdf_get_value($this->pdf,"fontsize",0);