PDF_fit_textline()

(PECL pdflib >= 2.0.0)

Place single line of text

说明

PDF_fit_textline(resource $pdfdoc,string $text,float $x,float $y,string $optlist): bool

Places a single line of text on the page, subject to various options.成功时返回TRUE，或者在失败时返回FALSE。

The function PDF_fit_textline has an "optlist" argument which you use to pass options. In other words, PDF_fit_textline contains many functions instead of one. A classical code smell.
The fact that the optlist argument is a string uglyfies this function by a factor of thousand.
Conclusion: when you make functions like PDF_show_boxed deprecated, replace it with a better function instead of doing the opposite.

One point about using the PDF_show_boxed function. 
It does not support Unicode. So if you need that support you will need to use this function or the text flow functions.

A patch to the code below to handle an array bounds error that arises:
<?php
$nextText = "";
if ( ( count( $tmpTxt ) - 1 ) >= ( $i + 1 ) )
{ $nextText = $tmpTxt[ $i+1 ]; }
        
if ( ( strlen( $str ) + strlen( $nextText ) ) > $cols )
?>

Here is a function I created in order to allow me to do textblocks on pdflib lite. Hope this helps someone else, cause all the stuff I've found on php.net has helped me.
$p is your pdf resource 
$text is the string to put in the box
$cols is the number col characters before a carriage return
$xcrd,$ycrd is lower left of first line.
This will accept \n as a newline/carriage return and use it to skip to next line. It is not setup to hyphenate words, but someday I'll build one, or buy the full pdf package. ;)
function text_block($p,$text,$cols,$xcrd,$ycrd)
{
$font_size=12; //font size, used to space lines on y axis
$tmplines = explode("\n",$text);
for($j=0;$j<count($tmplines);$j++)
  {
  $tmptxt = explode(" ",$tmplines[$j]);
  $str="";
  for($i=0;$i<count($tmptxt);$i++)
    {
    if($str=="") $str=sprintf("%s",$tmptxt[$i]);
    else  $str=sprintf("%s %s",$str,$tmptxt[$i]);
    if((strlen($str) + strlen($tmptxt[$i+1])) > $cols)
      {
      pdf_fit_textline($p,$str,$xcrd,$ycrd,"");
      $str="";
      $ycrd-=$font_size;
      }
    }
  pdf_fit_textline($p,$str,$xcrd,$ycrd,"");
  $ycrd-=$font_size;
  }
return $ycrd;
}

For right now, if you are using PDFlib Lite, you can still use the legacy (depreciated) PDF_show_boxed or $p->show_boxed functions to create a text area. This seems to be a good (if not as full-featured) alternative to the textflow functions, and definitely a whole lot easier than trying to write your own text wrapping/hyphenation solution.