请尝试此代码从http://devzone.zend.com/article/2525-Zend_Pdf-tutorial#comments-2535

我在我的应用程序中使用它来计算右对齐文本的偏移量,它的作用

/**
* Returns the total width in points of the string using the specified font and
* size.
*
* This is not the most efficient way to perform this calculation. I'm
* concentrating optimization efforts on the upcoming layout manager class.
* Similar calculations exist inside the layout manager class,but widths are
* generally calculated only after determining line fragments.
* 
* @link http://devzone.zend.COM/article/2525-Zend_Pdf-tutorial#comments-2535 
* @param string $string
* @param Zend_Pdf_Resource_Font $font
* @param float $fontSize Font size in points
* @return float
*/
function widthForStringUsingFontSize($string,$font,$fontSize)
{
     $drawingString = iconv('UTF-8','UTF-16BE//IGNORE',$string);
     $characters = array();
     for ($i = 0; $i < strlen($drawingString); $i++) {
         $characters[] = (ord($drawingString[$i++]) << 8 ) | ord($drawingString[$i]);
     }
     $glyphs = $font->glyphNumbersForCharacters($characters);
     $widths = $font->widthsForGlyphs($glyphs);
     $stringWidth = (array_sum($widths) / $font->getUnitsPerEm()) * $fontSize;
     return $stringWidth;
 }@H_304_18@ 
 
关于表演,我没有在剧本中集中精力,但是我可以想象它的速度很慢.如果可能,我建议将PDF写入磁盘,所以重复的视图非常快,缓存/硬编码数据也是可能的.