XoopsModules25x / mylinks

fpdf/fpdf.php

<?php
/*******************************************************************************
* Software: FPDF                                                               *
* Version:  1.53                                                               *
* Date:     2004-12-31                                                         *
* Author:   Olivier PLATHEY                                                    *
* License:  Freeware                                                           *
*                                                                              *
* You may use and modify this software as you wish.                            *
*******************************************************************************/
if (!defined('XOOPS_ROOT_PATH')) {
  die('XOOPS root path not defined');
}

if(!class_exists('FPDF'))
{
define('FPDF_VERSION','1.53');

class FPDF
{
//Private properties
var $page;               //current page number
var $n;                  //current object number
var $offsets;            //array of object offsets
var $buffer;             //buffer holding in-memory PDF
var $pages;              //array containing pages
var $state;              //current document state
var $compress;           //compression flag
var $DefOrientation;     //default orientation
var $CurOrientation;     //current orientation
var $OrientationChanges; //array indicating orientation changes
var $k;                  //scale factor (number of points in user unit)
var $fwPt,$fhPt;         //dimensions of page format in points
var $fw,$fh;             //dimensions of page format in user unit
var $wPt,$hPt;           //current dimensions of page in points
var $w,$h;               //current dimensions of page in user unit
var $lMargin;            //left margin
var $tMargin;            //top margin
var $rMargin;            //right margin
var $bMargin;            //page break margin
var $cMargin;            //cell margin
var $x,$y;               //current position in user unit for cell positioning
var $lasth;              //height of last cell printed
var $LineWidth;          //line width in user unit
var $CoreFonts;          //array of standard font names
var $fonts;              //array of used fonts
var $FontFiles;          //array of font files
var $diffs;              //array of encoding differences
var $images;             //array of used images
var $PageLinks;          //array of links in pages
var $links;              //array of internal links
var $FontFamily;         //current font family
var $FontStyle;          //current font style
var $underline;          //underlining flag
var $CurrentFont;        //current font info
var $FontSizePt;         //current font size in points
var $FontSize;           //current font size in user unit
var $DrawColor;          //commands for drawing color
var $FillColor;          //commands for filling color
var $TextColor;          //commands for text color
var $ColorFlag;          //indicates whether fill and text colors are different
var $ws;                 //word spacing
var $AutoPageBreak;      //automatic page breaking
var $PageBreakTrigger;   //threshold used to trigger page breaks
var $InFooter;           //flag set when processing footer
var $ZoomMode;           //zoom display mode
var $LayoutMode;         //layout display mode
var $title;              //title
var $subject;            //subject
var $author;             //author
var $keywords;           //keywords
var $creator;            //creator
var $AliasNbPages;       //alias for total number of pages
var $PDFVersion;         //PDF version number

/*******************************************************************************
*                                                                              *
*                               Public methods                                 *
*                                                                              *
*******************************************************************************/
function FPDF($orientation='P',$unit='mm',$format='A4')

It is generally recommended to explicitly declare the visibility for methods.

{
  //Some checks
  $this->_dochecks();
  //Initialization of properties
  $this->page=0;
  $this->n=2;
  $this->buffer='';
  $this->pages=array();
  $this->OrientationChanges=array();
  $this->state=0;
  $this->fonts=array();
  $this->FontFiles=array();
  $this->diffs=array();
  $this->images=array();
  $this->links=array();
  $this->InFooter=false;
  $this->lasth=0;
  $this->FontFamily='';
  $this->FontStyle='';
  $this->FontSizePt=12;
  $this->underline=false;
  $this->DrawColor='0 G';
  $this->FillColor='0 g';
  $this->TextColor='0 g';
  $this->ColorFlag=false;
  $this->ws=0;
  //Standard fonts
  $this->CoreFonts=array('courier'=>'Courier','courierB'=>'Courier-Bold','courierI'=>'Courier-Oblique','courierBI'=>'Courier-BoldOblique',
    'helvetica'=>'Helvetica','helveticaB'=>'Helvetica-Bold','helveticaI'=>'Helvetica-Oblique','helveticaBI'=>'Helvetica-BoldOblique',
    'times'=>'Times-Roman','timesB'=>'Times-Bold','timesI'=>'Times-Italic','timesBI'=>'Times-BoldItalic',
    'symbol'=>'Symbol','zapfdingbats'=>'ZapfDingbats');
  //Scale factor
  if($unit=='pt')
    $this->k=1;
  elseif($unit=='mm')
    $this->k=72/25.4;
  elseif($unit=='cm')
    $this->k=72/2.54;
  elseif($unit=='in')
    $this->k=72;
  else
    $this->Error('Incorrect unit: '.$unit);
  //Page format
  if(is_string($format))
  {
    $format=strtolower($format);
    if($format=='a3')
      $format=array(841.89,1190.55);
    elseif($format=='a4')
      $format=array(595.28,841.89);
    elseif($format=='a5')
      $format=array(420.94,595.28);
    elseif($format=='letter')
      $format=array(612,792);
    elseif($format=='legal')
      $format=array(612,1008);
    else
      $this->Error('Unknown page format: '.$format);
    $this->fwPt=$format[0];
    $this->fhPt=$format[1];
  }
  else
  {
    $this->fwPt=$format[0]*$this->k;
    $this->fhPt=$format[1]*$this->k;
  }
  $this->fw=$this->fwPt/$this->k;
  $this->fh=$this->fhPt/$this->k;
  //Page orientation
  $orientation=strtolower($orientation);
  if($orientation=='p' || $orientation=='portrait')
  {
    $this->DefOrientation='P';
    $this->wPt=$this->fwPt;
    $this->hPt=$this->fhPt;
  }
  elseif($orientation=='l' || $orientation=='landscape')
  {
    $this->DefOrientation='L';
    $this->wPt=$this->fhPt;
    $this->hPt=$this->fwPt;
  }
  else
    $this->Error('Incorrect orientation: '.$orientation);
  $this->CurOrientation=$this->DefOrientation;
  $this->w=$this->wPt/$this->k;
  $this->h=$this->hPt/$this->k;
  //Page margins (1 cm)
  $margin=28.35/$this->k;
  $this->SetMargins($margin,$margin);
  //Interior cell margin (1 mm)
  $this->cMargin=$margin/10;
  //Line width (0.2 mm)
  $this->LineWidth=.567/$this->k;
  //Automatic page break
  $this->SetAutoPageBreak(true,2*$margin);
  //Full width display mode
  $this->SetDisplayMode('fullwidth');
  //Enable compression
  $this->SetCompression(true);
  //Set default PDF version number
  $this->PDFVersion='1.3';
}

function SetMargins($left,$top,$right=-1)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Set left, top and right margins
  $this->lMargin=$left;
  $this->tMargin=$top;
  if($right==-1)
    $right=$left;
  $this->rMargin=$right;
}

function SetLeftMargin($margin)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Set left margin
  $this->lMargin=$margin;
  if($this->page>0 && $this->x<$margin)
    $this->x=$margin;
}

function SetTopMargin($margin)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Set top margin
  $this->tMargin=$margin;
}

function SetRightMargin($margin)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Set right margin
  $this->rMargin=$margin;
}

function SetAutoPageBreak($auto,$margin=0)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Set auto page break mode and triggering margin
  $this->AutoPageBreak=$auto;
  $this->bMargin=$margin;
  $this->PageBreakTrigger=$this->h-$margin;
}

function SetDisplayMode($zoom,$layout='continuous')

It is generally recommended to explicitly declare the visibility for methods.

{
  //Set display mode in viewer
  if($zoom=='fullpage' || $zoom=='fullwidth' || $zoom=='real' || $zoom=='default' || !is_string($zoom))
    $this->ZoomMode=$zoom;
  else
    $this->Error('Incorrect zoom display mode: '.$zoom);
  if($layout=='single' || $layout=='continuous' || $layout=='two' || $layout=='default')
    $this->LayoutMode=$layout;
  else
    $this->Error('Incorrect layout display mode: '.$layout);
}

function SetCompression($compress)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Set page compression
  if(function_exists('gzcompress'))
    $this->compress=$compress;
  else
    $this->compress=false;
}

function SetTitle($title)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Title of document
  $this->title=$title;
}

function SetSubject($subject)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Subject of document
  $this->subject=$subject;
}

function SetAuthor($author)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Author of document
  $this->author=$author;
}

function SetKeywords($keywords)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Keywords of document
  $this->keywords=$keywords;
}

function SetCreator($creator)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Creator of document
  $this->creator=$creator;
}

function AliasNbPages($alias='{nb}')

It is generally recommended to explicitly declare the visibility for methods.

{
  //Define an alias for total number of pages
  $this->AliasNbPages=$alias;
}

function Error($msg)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Fatal error
  //die('<B>FPDF error: </B>'.$msg);
}

function Open()

It is generally recommended to explicitly declare the visibility for methods.

{
  //Begin document
  $this->state=1;
}

function Close()

It is generally recommended to explicitly declare the visibility for methods.

{
  //Terminate document
  if($this->state==3)
    return;
  if($this->page==0)
    $this->AddPage();
  //Page footer
  $this->InFooter=true;
  $this->Footer();
  $this->InFooter=false;
  //Close page
  $this->_endpage();
  //Close document
  $this->_enddoc();
}

function AddPage($orientation='')

It is generally recommended to explicitly declare the visibility for methods.

{
  //Start a new page
  if($this->state==0)
    $this->Open();
  $family=$this->FontFamily;
  $style=$this->FontStyle.($this->underline ? 'U' : '');
  $size=$this->FontSizePt;
  $lw=$this->LineWidth;
  $dc=$this->DrawColor;
  $fc=$this->FillColor;
  $tc=$this->TextColor;
  $cf=$this->ColorFlag;
  if($this->page>0)
  {
    //Page footer
    $this->InFooter=true;
    $this->Footer();
    $this->InFooter=false;
    //Close page
    $this->_endpage();
  }
  //Start new page
  $this->_beginpage($orientation);
  //Set line cap style to square
  $this->_out('2 J');
  //Set line width
  $this->LineWidth=$lw;
  $this->_out(sprintf('%.2f w',$lw*$this->k));
  //Set font
  if($family)
    $this->SetFont($family,$style,$size);
  //Set colors
  $this->DrawColor=$dc;
  if($dc!='0 G')
    $this->_out($dc);
  $this->FillColor=$fc;
  if($fc!='0 g')
    $this->_out($fc);
  $this->TextColor=$tc;
  $this->ColorFlag=$cf;
  //Page header
  $this->Header();
  //Restore line width
  if($this->LineWidth!=$lw)
  {
    $this->LineWidth=$lw;
    $this->_out(sprintf('%.2f w',$lw*$this->k));
  }
  //Restore font
  if($family)
    $this->SetFont($family,$style,$size);
  //Restore colors
  if($this->DrawColor!=$dc)
  {
    $this->DrawColor=$dc;
    $this->_out($dc);
  }
  if($this->FillColor!=$fc)
  {
    $this->FillColor=$fc;
    $this->_out($fc);
  }
  $this->TextColor=$tc;
  $this->ColorFlag=$cf;
}

function Header()

It is generally recommended to explicitly declare the visibility for methods.

{
  //To be implemented in your own inherited class
}

function Footer()

It is generally recommended to explicitly declare the visibility for methods.

{
  //To be implemented in your own inherited class
}

function PageNo()

It is generally recommended to explicitly declare the visibility for methods.

{
  //Get current page number
  return $this->page;
}

function SetDrawColor($r,$g=-1,$b=-1)

It is generally recommended to explicitly declare the visibility for methods.

This method seems to be duplicated in your project.

{
  //Set color for all stroking operations
  if(($r==0 && $g==0 && $b==0) || $g==-1)
    $this->DrawColor=sprintf('%.3f G',$r/255);
  else
    $this->DrawColor=sprintf('%.3f %.3f %.3f RG',$r/255,$g/255,$b/255);
  if($this->page>0)
    $this->_out($this->DrawColor);
}

function SetFillColor($r,$g=-1,$b=-1)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Set color for all filling operations
  if(($r==0 && $g==0 && $b==0) || $g==-1)
    $this->FillColor=sprintf('%.3f g',$r/255);
  else
    $this->FillColor=sprintf('%.3f %.3f %.3f rg',$r/255,$g/255,$b/255);
  $this->ColorFlag=($this->FillColor!=$this->TextColor);
  if($this->page>0)
    $this->_out($this->FillColor);
}

function SetTextColor($r,$g=-1,$b=-1)

It is generally recommended to explicitly declare the visibility for methods.

This method seems to be duplicated in your project.

{
  //Set color for text
  if(($r==0 && $g==0 && $b==0) || $g==-1)
    $this->TextColor=sprintf('%.3f g',$r/255);
  else
    $this->TextColor=sprintf('%.3f %.3f %.3f rg',$r/255,$g/255,$b/255);
  $this->ColorFlag=($this->FillColor!=$this->TextColor);
}

function GetStringWidth($s)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Get width of a string in the current font
  $s=(string)$s;
  $cw=&$this->CurrentFont['cw'];
  $w=0;
  $l=strlen($s);
  for($i=0;$i<$l;$i++)
    $w+=$cw[$s{$i}];

  return $w*$this->FontSize/1000;
}

function SetLineWidth($width)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Set line width
  $this->LineWidth=$width;
  if($this->page>0)
    $this->_out(sprintf('%.2f w',$width*$this->k));
}

function Line($x1,$y1,$x2,$y2)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Draw a line
  $this->_out(sprintf('%.2f %.2f m %.2f %.2f l S',$x1*$this->k,($this->h-$y1)*$this->k,$x2*$this->k,($this->h-$y2)*$this->k));
}

function Rect($x,$y,$w,$h,$style='')

It is generally recommended to explicitly declare the visibility for methods.

{
  //Draw a rectangle
  if($style=='F')
    $op='f';
  elseif($style=='FD' || $style=='DF')
    $op='B';
  else
    $op='S';
  $this->_out(sprintf('%.2f %.2f %.2f %.2f re %s',$x*$this->k,($this->h-$y)*$this->k,$w*$this->k,-$h*$this->k,$op));
}

function AddFont($family,$style='',$file='')

It is generally recommended to explicitly declare the visibility for methods.

{
  //Add a TrueType or Type1 font
  $family=strtolower($family);
  if($file=='')
    $file=str_replace(' ','',$family).strtolower($style).'.php';
  if($family=='arial')
    $family='helvetica';
  $style=strtoupper($style);
  if($style=='IB')
    $style='BI';
  $fontkey=$family.$style;
  if(isset($this->fonts[$fontkey]))
    $this->Error('Font already added: '.$family.' '.$style);
  include($this->_getfontpath().$file);
  if(!isset($name))

The variable $name seems to never exist, and therefore isset should always return false. Did you maybe rename this variable?

    $this->Error('Could not include font definition file');
  $i=count($this->fonts)+1;
  $this->fonts[$fontkey]=array('i'=>$i,'type'=>$type,'name'=>$name,'desc'=>$desc,'up'=>$up,'ut'=>$ut,'cw'=>$cw,'enc'=>$enc,'file'=>$file);

The variable $type does not exist. Did you forget to declare it?

The variable $name does not seem to be defined for all execution paths leading up to this point.

The variable $desc does not exist. Did you forget to declare it?

The variable $up does not exist. Did you forget to declare it?

The variable $ut does not exist. Did you forget to declare it?

The variable $cw does not exist. Did you forget to declare it?

The variable $enc does not exist. Did you forget to declare it?

  if($diff)
  {
    //Search existing encodings
    $d=0;
    $nb=count($this->diffs);
    for($i=1;$i<=$nb;$i++)
    {
      if($this->diffs[$i]==$diff)

The variable $diff does not exist. Did you forget to declare it?

      {
        $d=$i;
        break;
      }
    }
    if($d==0)
    {
      $d=$nb+1;
      $this->diffs[$d]=$diff;
    }
    $this->fonts[$fontkey]['diff']=$d;
  }
  if($file)
  {
    if($type=='TrueType')
      $this->FontFiles[$file]=array('length1'=>$originalsize);

The variable $originalsize does not exist. Did you forget to declare it?

    else
      $this->FontFiles[$file]=array('length1'=>$size1,'length2'=>$size2);

The variable $size1 does not exist. Did you forget to declare it?

The variable $size2 does not exist. Did you forget to declare it?

  }
}

function SetFont($family,$style='',$size=0)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Select a font; size given in points
  global $fpdf_charwidths;

  $family=strtolower($family);
  if($family=='')
    $family=$this->FontFamily;
  if($family=='arial')
    $family='helvetica';
  elseif($family=='symbol' || $family=='zapfdingbats')
    $style='';
  $style=strtoupper($style);
  if(strpos($style,'U')!==false)
  {
    $this->underline=true;
    $style=str_replace('U','',$style);
  }
  else
    $this->underline=false;
  if($style=='IB')
    $style='BI';
  if($size==0)
    $size=$this->FontSizePt;
  //Test if font is already selected
  if($this->FontFamily==$family && $this->FontStyle==$style && $this->FontSizePt==$size)
    return;
  //Test if used for the first time
  $fontkey=$family.$style;
  if(!isset($this->fonts[$fontkey]))
  {
    //Check if one of the standard fonts
    if(isset($this->CoreFonts[$fontkey]))
    {
      if(!isset($fpdf_charwidths[$fontkey]))
      {
        //Load metric file
        $file=$family;
        if($family=='times' || $family=='helvetica')
          $file.=strtolower($style);
        include($this->_getfontpath().$file.'.php');
        if(!isset($fpdf_charwidths[$fontkey]))
          $this->Error('Could not include font metric file');
      }
      $i=count($this->fonts)+1;
      $this->fonts[$fontkey]=array('i'=>$i,'type'=>'core','name'=>$this->CoreFonts[$fontkey],'up'=>-100,'ut'=>50,'cw'=>$fpdf_charwidths[$fontkey]);
    }
    else
      $this->Error('Undefined font: '.$family.' '.$style);
  }
  //Select it
  $this->FontFamily=$family;
  $this->FontStyle=$style;
  $this->FontSizePt=$size;
  $this->FontSize=$size/$this->k;
  $this->CurrentFont=&$this->fonts[$fontkey];
  if($this->page>0)

This code seems to be duplicated across your project.

    $this->_out(sprintf('BT /F%d %.2f Tf ET',$this->CurrentFont['i'],$this->FontSizePt));
}

function SetFontSize($size)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Set font size in points
  if($this->FontSizePt==$size)
    return;
  $this->FontSizePt=$size;
  $this->FontSize=$size/$this->k;
  if($this->page>0)

This code seems to be duplicated across your project.

    $this->_out(sprintf('BT /F%d %.2f Tf ET',$this->CurrentFont['i'],$this->FontSizePt));
}

function AddLink()

It is generally recommended to explicitly declare the visibility for methods.

{
  //Create a new internal link
  $n=count($this->links)+1;
  $this->links[$n]=array(0,0);

  return $n;
}

function SetLink($link,$y=0,$page=-1)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Set destination of internal link
  if($y==-1)
    $y=$this->y;
  if($page==-1)
    $page=$this->page;
  $this->links[$link]=array($page,$y);
}

function Link($x,$y,$w,$h,$link)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Put a link on the page
  $this->PageLinks[$this->page][]=array($x*$this->k,$this->hPt-$y*$this->k,$w*$this->k,$h*$this->k,$link);
}

function Text($x,$y,$txt)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Output a string
  $s=sprintf('BT %.2f %.2f Td (%s) Tj ET',$x*$this->k,($this->h-$y)*$this->k,$this->_escape($txt));
  if($this->underline && $txt!='')
    $s.=' '.$this->_dounderline($x,$y,$txt);
  if($this->ColorFlag)
    $s='q '.$this->TextColor.' '.$s.' Q';
  $this->_out($s);
}

function AcceptPageBreak()

The return type could not be reliably inferred; please add a @return annotation.

It is generally recommended to explicitly declare the visibility for methods.

{
  //Accept automatic page break or not
  return $this->AutoPageBreak;
}

function Cell($w,$h=0,$txt='',$border=0,$ln=0,$align='',$fill=0,$link='')

It is generally recommended to explicitly declare the visibility for methods.

{
  //Output a cell
  $k=$this->k;
  if($this->y+$h>$this->PageBreakTrigger && !$this->InFooter && $this->AcceptPageBreak())
  {
    //Automatic page break
    $x=$this->x;
    $ws=$this->ws;
    if($ws>0)
    {
      $this->ws=0;
      $this->_out('0 Tw');
    }
    $this->AddPage($this->CurOrientation);
    $this->x=$x;
    if($ws>0)
    {
      $this->ws=$ws;
      $this->_out(sprintf('%.3f Tw',$ws*$k));
    }
  }
  if($w==0)
    $w=$this->w-$this->rMargin-$this->x;
  $s='';
  if($fill==1 || $border==1)
  {
    if($fill==1)
      $op=($border==1) ? 'B' : 'f';
    else
      $op='S';
    $s=sprintf('%.2f %.2f %.2f %.2f re %s ',$this->x*$k,($this->h-$this->y)*$k,$w*$k,-$h*$k,$op);
  }
  if(is_string($border))
  {
    $x=$this->x;
    $y=$this->y;
    if(strpos($border,'L')!==false)

This code seems to be duplicated across your project.

      $s.=sprintf('%.2f %.2f m %.2f %.2f l S ',$x*$k,($this->h-$y)*$k,$x*$k,($this->h-($y+$h))*$k);
    if(strpos($border,'T')!==false)

This code seems to be duplicated across your project.

      $s.=sprintf('%.2f %.2f m %.2f %.2f l S ',$x*$k,($this->h-$y)*$k,($x+$w)*$k,($this->h-$y)*$k);
    if(strpos($border,'R')!==false)

This code seems to be duplicated across your project.

      $s.=sprintf('%.2f %.2f m %.2f %.2f l S ',($x+$w)*$k,($this->h-$y)*$k,($x+$w)*$k,($this->h-($y+$h))*$k);
    if(strpos($border,'B')!==false)

This code seems to be duplicated across your project.

      $s.=sprintf('%.2f %.2f m %.2f %.2f l S ',$x*$k,($this->h-($y+$h))*$k,($x+$w)*$k,($this->h-($y+$h))*$k);
  }
  if($txt!=='')
  {
    if($align=='R')
      $dx=$w-$this->cMargin-$this->GetStringWidth($txt);
    elseif($align=='C')
      $dx=($w-$this->GetStringWidth($txt))/2;
    else
      $dx=$this->cMargin;
    if($this->ColorFlag)
      $s.='q '.$this->TextColor.' ';
    $txt2=str_replace(')','\\)',str_replace('(','\\(',str_replace('\\','\\\\',$txt)));
    $s.=sprintf('BT %.2f %.2f Td (%s) Tj ET',($this->x+$dx)*$k,($this->h-($this->y+.5*$h+.3*$this->FontSize))*$k,$txt2);
    if($this->underline)
      $s.=' '.$this->_dounderline($this->x+$dx,$this->y+.5*$h+.3*$this->FontSize,$txt);
    if($this->ColorFlag)
      $s.=' Q';
    if($link)
      $this->Link($this->x+$dx,$this->y+.5*$h-.5*$this->FontSize,$this->GetStringWidth($txt),$this->FontSize,$link);
  }
  if($s)
    $this->_out($s);
  $this->lasth=$h;
  if($ln>0)
  {
    //Go to next line
    $this->y+=$h;
    if($ln==1)
      $this->x=$this->lMargin;
  }
  else
    $this->x+=$w;
}

function MultiCell($w,$h,$txt,$border=0,$align='J',$fill=0)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Output text with automatic or explicit line breaks
  $cw=&$this->CurrentFont['cw'];
  if($w==0)
    $w=$this->w-$this->rMargin-$this->x;
  $wmax=($w-2*$this->cMargin)*1000/$this->FontSize;
  $s=str_replace("\r",'',$txt);
  $nb=strlen($s);
  if($nb>0 && $s[$nb-1]=="\n")
    $nb--;
  $b=0;
  if($border)
  {
    if($border==1)
    {
      $border='LTRB';
      $b='LRT';
      $b2='LR';
    }
    else
    {
      $b2='';
      if(strpos($border,'L')!==false)
        $b2.='L';
      if(strpos($border,'R')!==false)
        $b2.='R';
      $b=(strpos($border,'T')!==false) ? $b2.'T' : $b2;
    }
  }
  $sep=-1;
  $i=0;
  $j=0;
  $l=0;
  $ns=0;
  $nl=1;
  while($i<$nb)
  {
    //Get next character
    $c=$s{$i};
    if($c=="\n")
    {
      //Explicit line break
      if($this->ws>0)
      {
        $this->ws=0;
        $this->_out('0 Tw');
      }
      $this->Cell($w,$h,substr($s,$j,$i-$j),$b,2,$align,$fill);
      $i++;
      $sep=-1;
      $j=$i;
      $l=0;
      $ns=0;
      $nl++;
      if($border && $nl==2)
        $b=$b2;

The variable $b2 does not seem to be defined for all execution paths leading up to this point.

      continue;
    }
    if($c==' ')
    {
      $sep=$i;
      $ls=$l;
      $ns++;
    }
    $l+=$cw[$c];
    if($l>$wmax)
    {
      //Automatic line break
      if($sep==-1)
      {
        if($i==$j)
          $i++;
        if($this->ws>0)
        {
          $this->ws=0;
          $this->_out('0 Tw');
        }
        $this->Cell($w,$h,substr($s,$j,$i-$j),$b,2,$align,$fill);
      }
      else
      {
        if($align=='J')
        {
          $this->ws=($ns>1) ? ($wmax-$ls)/1000*$this->FontSize/($ns-1) : 0;

The variable $ls does not seem to be defined for all execution paths leading up to this point.

          $this->_out(sprintf('%.3f Tw',$this->ws*$this->k));
        }
        $this->Cell($w,$h,substr($s,$j,$sep-$j),$b,2,$align,$fill);
        $i=$sep+1;
      }
      $sep=-1;
      $j=$i;
      $l=0;
      $ns=0;
      $nl++;
      if($border && $nl==2)
        $b=$b2;
    }
    else
      $i++;
  }
  //Last chunk
  if($this->ws>0)
  {
    $this->ws=0;
    $this->_out('0 Tw');
  }
  if($border && strpos($border,'B')!==false)
    $b.='B';
  $this->Cell($w,$h,substr($s,$j,$i-$j),$b,2,$align,$fill);
  $this->x=$this->lMargin;
}

function Write($h,$txt,$link='')

It is generally recommended to explicitly declare the visibility for methods.

{
  //Output text in flowing mode
  $cw=&$this->CurrentFont['cw'];
  $w=$this->w-$this->rMargin-$this->x;
  $wmax=($w-2*$this->cMargin)*1000/$this->FontSize;
  $s=str_replace("\r",'',$txt);
  $nb=strlen($s);
  $sep=-1;
  $i=0;
  $j=0;
  $l=0;
  $nl=1;
  while($i<$nb)
  {
    //Get next character
    $c=$s{$i};
    if($c=="\n")
    {
      //Explicit line break
      $this->Cell($w,$h,substr($s,$j,$i-$j),0,2,'',0,$link);
      $i++;
      $sep=-1;
      $j=$i;
      $l=0;
      if($nl==1)
      {
        $this->x=$this->lMargin;
        $w=$this->w-$this->rMargin-$this->x;
        $wmax=($w-2*$this->cMargin)*1000/$this->FontSize;
      }
      $nl++;
      continue;
    }
    if($c==' ')
      $sep=$i;
    $l+=$cw[$c];
    if($l>$wmax)
    {
      //Automatic line break
      if($sep==-1)
      {
        if($this->x>$this->lMargin)
        {
          //Move to next line
          $this->x=$this->lMargin;
          $this->y+=$h;
          $w=$this->w-$this->rMargin-$this->x;
          $wmax=($w-2*$this->cMargin)*1000/$this->FontSize;
          $i++;
          $nl++;
          continue;
        }
        if($i==$j)
          $i++;
        $this->Cell($w,$h,substr($s,$j,$i-$j),0,2,'',0,$link);
      }
      else
      {
        $this->Cell($w,$h,substr($s,$j,$sep-$j),0,2,'',0,$link);
        $i=$sep+1;
      }
      $sep=-1;
      $j=$i;
      $l=0;
      if($nl==1)
      {
        $this->x=$this->lMargin;
        $w=$this->w-$this->rMargin-$this->x;
        $wmax=($w-2*$this->cMargin)*1000/$this->FontSize;
      }
      $nl++;
    }
    else
      $i++;
  }
  //Last chunk
  if($i!=$j)
    $this->Cell($l/1000*$this->FontSize,$h,substr($s,$j),0,0,'',0,$link);
}

function Image($file,$x,$y,$w=0,$h=0,$type='',$link='')

It is generally recommended to explicitly declare the visibility for methods.

{
  //Put an image on the page
  if(!isset($this->images[$file]))
  {
    //First use of image, get info
    if($type=='')
    {
      $pos=strrpos($file,'.');
      if(!$pos)
        $this->Error('Image file has no extension and no type was specified: '.$file);
      $type=substr($file,$pos+1);
    }
    $type=strtolower($type);
    $mqr=get_magic_quotes_runtime();
    set_magic_quotes_runtime(0);
    if($type=='jpg' || $type=='jpeg')
      $info=$this->_parsejpg($file);
    elseif($type=='png')
      $info=$this->_parsepng($file);
    else
    {
      //Allow for additional formats
      $mtd='_parse'.$type;
      if(!method_exists($this,$mtd))
        $this->Error('Unsupported image type: '.$type);
      else $info=$this->$mtd($file);
    }
    if(empty($info)) return null;
    set_magic_quotes_runtime($mqr);
    $info['i']=count($this->images)+1;
    $this->images[$file]=$info;
  }
  else
    $info=$this->images[$file];
  //Automatic width and height calculation if needed
  if($w==0 && $h==0)
  {
    //Put image at 72 dpi
    $w=$info['w']/$this->k;
    $h=$info['h']/$this->k;
  }
  if($w==0)
    $w=$h*$info['w']/$info['h'];
  if($h==0)
    $h=$w*$info['h']/$info['w'];
  $this->_out(sprintf('q %.2f 0 0 %.2f %.2f %.2f cm /I%d Do Q',$w*$this->k,$h*$this->k,$x*$this->k,($this->h-($y+$h))*$this->k,$info['i']));
  if($link)
    $this->Link($x,$y,$w,$h,$link);
}

function Ln($h='')

It is generally recommended to explicitly declare the visibility for methods.

{
  //Line feed; default value is last cell height
  $this->x=$this->lMargin;
  if(is_string($h))
    $this->y+=$this->lasth;
  else
    $this->y+=$h;
}

function GetX()

It is generally recommended to explicitly declare the visibility for methods.

{
  //Get x position
  return $this->x;
}

function SetX($x)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Set x position
  if($x>=0)
    $this->x=$x;
  else
    $this->x=$this->w+$x;
}

function GetY()

It is generally recommended to explicitly declare the visibility for methods.

{
  //Get y position
  return $this->y;
}

function SetY($y)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Set y position and reset x
  $this->x=$this->lMargin;
  if($y>=0)
    $this->y=$y;
  else
    $this->y=$this->h+$y;
}

function SetXY($x,$y)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Set x and y positions
  $this->SetY($y);
  $this->SetX($x);
}

function Output($name='',$dest='')

It is generally recommended to explicitly declare the visibility for methods.

{
  //Output PDF to some destination
  //Finish document if necessary
  if($this->state<3)
    $this->Close();
  //Normalize parameters
  if(is_bool($dest))
    $dest=$dest ? 'D' : 'F';
  $dest=strtoupper($dest);
  if($dest=='')
  {
    if($name=='')
    {
      $name='doc.pdf';
      $dest='I';
    }
    else
      $dest='F';
  }
  switch($dest)
  {
    case 'I':
      //Send to standard output
      if(ob_get_contents())
        $this->Error('Some data has already been output, can\'t send PDF file');
      if(php_sapi_name()!='cli')
      {
        //We send to a browser
        header('Content-Type: application/pdf');
        if(headers_sent())
          $this->Error('Some data has already been output to browser, can\'t send PDF file');
        header('Content-Length: '.strlen($this->buffer));
        header('Content-disposition: inline; filename="'.$name.'"');
      }
      echo $this->buffer;
      break;
    case 'D':
      //Download file
      if(ob_get_contents())
        $this->Error('Some data has already been output, can\'t send PDF file');
      if(isset($_SERVER['HTTP_USER_AGENT']) && strpos($_SERVER['HTTP_USER_AGENT'],'MSIE'))
        header('Content-Type: application/force-download');
      else
        header('Content-Type: application/octet-stream');
      if(headers_sent())
        $this->Error('Some data has already been output to browser, can\'t send PDF file');
      header('Content-Length: '.strlen($this->buffer));
      header('Content-disposition: attachment; filename="'.$name.'"');
      echo $this->buffer;
      break;
    case 'F':
      //Save to local file
      $f=fopen($name,'wb');
      if(!$f){
        $this->Error('Unable to create output file: '.$name);

        return null;
      }
      fwrite($f,$this->buffer,strlen($this->buffer));
      fclose($f);
      break;
    case 'S':
      //Return as a string
      return $this->buffer;
    default:
      $this->Error('Incorrect output destination: '.$dest);
  }

  return '';
}

/*******************************************************************************
*                                                                              *
*                              Protected methods                               *
*                                                                              *
*******************************************************************************/
function _dochecks()

It is generally recommended to explicitly declare the visibility for methods.

{
  //Check for locale-related bug
  if(1.1==1)
    $this->Error('Don\'t alter the locale before including class file');
  //Check for decimal separator
  if(sprintf('%.1f',1.0)!='1.0')
    setlocale(LC_NUMERIC,'C');
}

function _getfontpath()

It is generally recommended to explicitly declare the visibility for methods.

{
  if(!defined('FPDF_FONTPATH') && is_dir(__DIR__.'/font'))
    define('FPDF_FONTPATH',__DIR__.'/font/');

  return defined('FPDF_FONTPATH') ? FPDF_FONTPATH : '';
}

function _putpages()

It is generally recommended to explicitly declare the visibility for methods.

{
  $nb=$this->page;
  if(!empty($this->AliasNbPages))
  {
    //Replace number of pages
    for($n=1;$n<=$nb;$n++)
      $this->pages[$n]=str_replace($this->AliasNbPages,$nb,$this->pages[$n]);
  }
  if($this->DefOrientation=='P')
  {
    $wPt=$this->fwPt;
    $hPt=$this->fhPt;
  }
  else
  {
    $wPt=$this->fhPt;
    $hPt=$this->fwPt;
  }
  $filter= $this->compress ? '/Filter /FlateDecode ' : '';
  for($n=1;$n<=$nb;$n++)
  {
    //Page
    $this->_newobj();
    $this->_out('<</Type /Page');
    $this->_out('/Parent 1 0 R');
    if(isset($this->OrientationChanges[$n]))
      $this->_out(sprintf('/MediaBox [0 0 %.2f %.2f]',$hPt,$wPt));
    $this->_out('/Resources 2 0 R');
    if(isset($this->PageLinks[$n]))
    {
      //Links
      $annots='/Annots [';
      foreach($this->PageLinks[$n] as $pl)
      {
        $rect=sprintf('%.2f %.2f %.2f %.2f',$pl[0],$pl[1],$pl[0]+$pl[2],$pl[1]-$pl[3]);
        $annots.='<</Type /Annot /Subtype /Link /Rect ['.$rect.'] /Border [0 0 0] ';
        if(is_string($pl[4]))
          $annots.='/A <</S /URI /URI '.$this->_textstring($pl[4]).'>>>>';
        else
        {
          $l=$this->links[$pl[4]];
          $h=isset($this->OrientationChanges[$l[0]]) ? $wPt : $hPt;
          $annots.=sprintf('/Dest [%d 0 R /XYZ 0 %.2f null]>>',1+2*$l[0],$h-$l[1]*$this->k);
        }
      }
      $this->_out($annots.']');
    }
    $this->_out('/Contents '.($this->n+1).' 0 R>>');
    $this->_out('endobj');
    //Page content
    $p= $this->compress ? gzcompress($this->pages[$n]) : $this->pages[$n];
    $this->_newobj();
    $this->_out('<<'.$filter.'/Length '.strlen($p).'>>');
    $this->_putstream($p);
    $this->_out('endobj');
  }
  //Pages root
  $this->offsets[1]=strlen($this->buffer);
  $this->_out('1 0 obj');
  $this->_out('<</Type /Pages');
  $kids='/Kids [';
  for($i=0;$i<$nb;$i++)
    $kids.=(3+2*$i).' 0 R ';
  $this->_out($kids.']');
  $this->_out('/Count '.$nb);
  $this->_out(sprintf('/MediaBox [0 0 %.2f %.2f]',$wPt,$hPt));
  $this->_out('>>');
  $this->_out('endobj');
}

function _putfonts()

It is generally recommended to explicitly declare the visibility for methods.

{
  $nf=$this->n;
  foreach($this->diffs as $diff)
  {
    //Encodings
    $this->_newobj();
    $this->_out('<</Type /Encoding /BaseEncoding /WinAnsiEncoding /Differences ['.$diff.']>>');
    $this->_out('endobj');
  }
  $mqr=get_magic_quotes_runtime();
  set_magic_quotes_runtime(0);
  foreach($this->FontFiles as $file=>$info)
  {
    //Font file embedding
    $this->_newobj();
    $this->FontFiles[$file]['n']=$this->n;
    $font='';
    $f=fopen($this->_getfontpath().$file,'rb',1);
    if(!$f)
      $this->Error('Font file not found');
    while(!feof($f))
      $font.=fread($f,8192);
    fclose($f);
    $compressed=(substr($file,-2)=='.z');
    if(!$compressed && isset($info['length2']))
    {
      $header=(ord($font{0})==128);
      if($header)
      {
        //Strip first binary header
        $font=substr($font,6);
      }
      if($header && ord($font{$info['length1']})==128)
      {
        //Strip second binary header
        $font=substr($font,0,$info['length1']).substr($font,$info['length1']+6);
      }
    }
    $this->_out('<</Length '.strlen($font));
    if($compressed)
      $this->_out('/Filter /FlateDecode');
    $this->_out('/Length1 '.$info['length1']);
    if(isset($info['length2']))
      $this->_out('/Length2 '.$info['length2'].' /Length3 0');
    $this->_out('>>');
    $this->_putstream($font);
    $this->_out('endobj');
  }
  set_magic_quotes_runtime($mqr);
  foreach($this->fonts as $k=>$font)
  {
    //Font objects
    $this->fonts[$k]['n']=$this->n+1;
    $type=$font['type'];
    $name=$font['name'];
    if($type=='core')
    {
      //Standard font
      $this->_newobj();
      $this->_out('<</Type /Font');
      $this->_out('/BaseFont /'.$name);
      $this->_out('/Subtype /Type1');
      if($name!='Symbol' && $name!='ZapfDingbats')
        $this->_out('/Encoding /WinAnsiEncoding');
      $this->_out('>>');
      $this->_out('endobj');
    }
    elseif($type=='Type1' || $type=='TrueType')
    {
      //Additional Type1 or TrueType font
      $this->_newobj();
      $this->_out('<</Type /Font');
      $this->_out('/BaseFont /'.$name);
      $this->_out('/Subtype /'.$type);
      $this->_out('/FirstChar 32 /LastChar 255');
      $this->_out('/Widths '.($this->n+1).' 0 R');
      $this->_out('/FontDescriptor '.($this->n+2).' 0 R');
      if($font['enc'])
      {
        if(isset($font['diff']))
          $this->_out('/Encoding '.($nf+$font['diff']).' 0 R');
        else
          $this->_out('/Encoding /WinAnsiEncoding');
      }
      $this->_out('>>');
      $this->_out('endobj');
      //Widths
      $this->_newobj();
      $cw=&$font['cw'];
      $s='[';
      for($i=32;$i<=255;$i++)
        $s.=$cw[chr($i)].' ';
      $this->_out($s.']');
      $this->_out('endobj');
      //Descriptor
      $this->_newobj();
      $s='<</Type /FontDescriptor /FontName /'.$name;
      foreach($font['desc'] as $k=>$v)
        $s.=' /'.$k.' '.$v;
      $file=$font['file'];
      if($file)
        $s.=' /FontFile'.($type=='Type1' ? '' : '2').' '.$this->FontFiles[$file]['n'].' 0 R';
      $this->_out($s.'>>');
      $this->_out('endobj');
    }
    else
    {
      //Allow for additional types
      $mtd='_put'.strtolower($type);
      if(!method_exists($this,$mtd))
        $this->Error('Unsupported font type: '.$type);
      $this->$mtd($font);
    }
  }
}

function _putimages()

It is generally recommended to explicitly declare the visibility for methods.

{
  $filter= $this->compress ? '/Filter /FlateDecode ' : '';
  reset($this->images);
  while(list($file,$info)=each($this->images))
  {
    $this->_newobj();
    $this->images[$file]['n']=$this->n;
    $this->_out('<</Type /XObject');
    $this->_out('/Subtype /Image');
    $this->_out('/Width '.$info['w']);
    $this->_out('/Height '.$info['h']);
    if($info['cs']=='Indexed')
      $this->_out('/ColorSpace [/Indexed /DeviceRGB '.(strlen($info['pal'])/3-1).' '.($this->n+1).' 0 R]');
    else
    {
      $this->_out('/ColorSpace /'.$info['cs']);
      if($info['cs']=='DeviceCMYK')
        $this->_out('/Decode [1 0 1 0 1 0 1 0]');
    }
    $this->_out('/BitsPerComponent '.$info['bpc']);
    if(isset($info['f']))
      $this->_out('/Filter /'.$info['f']);
    if(isset($info['parms']))
      $this->_out($info['parms']);
    if(isset($info['trns']) && is_array($info['trns']))
    {
      $trns='';
      for($i=0;$i<count($info['trns']);$i++)

It seems like you are calling the size function count() as part of the test condition. You might want to compute the size beforehand, and not on each iteration.

        $trns.=$info['trns'][$i].' '.$info['trns'][$i].' ';
      $this->_out('/Mask ['.$trns.']');
    }
    $this->_out('/Length '.strlen($info['data']).'>>');
    $this->_putstream($info['data']);
    unset($this->images[$file]['data']);
    $this->_out('endobj');
    //Palette
    if($info['cs']=='Indexed')
    {
      $this->_newobj();
      $pal= $this->compress ? gzcompress($info['pal']) : $info['pal'];
      $this->_out('<<'.$filter.'/Length '.strlen($pal).'>>');
      $this->_putstream($pal);
      $this->_out('endobj');
    }
  }
}

function _putxobjectdict()

It is generally recommended to explicitly declare the visibility for methods.

{
  foreach($this->images as $image)
    $this->_out('/I'.$image['i'].' '.$image['n'].' 0 R');
}

function _putresourcedict()

It is generally recommended to explicitly declare the visibility for methods.

{
  $this->_out('/ProcSet [/PDF /Text /ImageB /ImageC /ImageI]');
  $this->_out('/Font <<');
  foreach($this->fonts as $font)
    $this->_out('/F'.$font['i'].' '.$font['n'].' 0 R');
  $this->_out('>>');
  $this->_out('/XObject <<');
  $this->_putxobjectdict();
  $this->_out('>>');
}

function _putresources()

It is generally recommended to explicitly declare the visibility for methods.

{
  $this->_putfonts();
  $this->_putimages();
  //Resource dictionary
  $this->offsets[2]=strlen($this->buffer);
  $this->_out('2 0 obj');
  $this->_out('<<');
  $this->_putresourcedict();
  $this->_out('>>');
  $this->_out('endobj');
}

function _putinfo()

It is generally recommended to explicitly declare the visibility for methods.

{
  $this->_out('/Producer '.$this->_textstring('FPDF '.FPDF_VERSION));
  if(!empty($this->title))
    $this->_out('/Title '.$this->_textstring($this->title));
  if(!empty($this->subject))
    $this->_out('/Subject '.$this->_textstring($this->subject));
  if(!empty($this->author))
    $this->_out('/Author '.$this->_textstring($this->author));
  if(!empty($this->keywords))
    $this->_out('/Keywords '.$this->_textstring($this->keywords));
  if(!empty($this->creator))
    $this->_out('/Creator '.$this->_textstring($this->creator));
  $this->_out('/CreationDate '.$this->_textstring('D:'.date('YmdHis')));
}

function _putcatalog()

It is generally recommended to explicitly declare the visibility for methods.

{
  $this->_out('/Type /Catalog');
  $this->_out('/Pages 1 0 R');
  if($this->ZoomMode=='fullpage')
    $this->_out('/OpenAction [3 0 R /Fit]');
  elseif($this->ZoomMode=='fullwidth')
    $this->_out('/OpenAction [3 0 R /FitH null]');
  elseif($this->ZoomMode=='real')
    $this->_out('/OpenAction [3 0 R /XYZ null null 1]');
  elseif(!is_string($this->ZoomMode))
    $this->_out('/OpenAction [3 0 R /XYZ null null '.($this->ZoomMode/100).']');
  if($this->LayoutMode=='single')
    $this->_out('/PageLayout /SinglePage');
  elseif($this->LayoutMode=='continuous')
    $this->_out('/PageLayout /OneColumn');
  elseif($this->LayoutMode=='two')
    $this->_out('/PageLayout /TwoColumnLeft');
}

function _putheader()

It is generally recommended to explicitly declare the visibility for methods.

{
  $this->_out('%PDF-'.$this->PDFVersion);
}

function _puttrailer()

It is generally recommended to explicitly declare the visibility for methods.

{
  $this->_out('/Size '.($this->n+1));
  $this->_out('/Root '.$this->n.' 0 R');
  $this->_out('/Info '.($this->n-1).' 0 R');
}

function _enddoc()

It is generally recommended to explicitly declare the visibility for methods.

{
  $this->_putheader();
  $this->_putpages();
  $this->_putresources();
  //Info
  $this->_newobj();
  $this->_out('<<');
  $this->_putinfo();
  $this->_out('>>');
  $this->_out('endobj');
  //Catalog
  $this->_newobj();
  $this->_out('<<');
  $this->_putcatalog();
  $this->_out('>>');
  $this->_out('endobj');
  //Cross-ref
  $o=strlen($this->buffer);
  $this->_out('xref');
  $this->_out('0 '.($this->n+1));
  $this->_out('0000000000 65535 f ');
  for($i=1;$i<=$this->n;$i++)
    $this->_out(sprintf('%010d 00000 n ',$this->offsets[$i]));
  //Trailer
  $this->_out('trailer');
  $this->_out('<<');
  $this->_puttrailer();
  $this->_out('>>');
  $this->_out('startxref');
  $this->_out($o);
  $this->_out('%%EOF');
  $this->state=3;
}

function _beginpage($orientation)

It is generally recommended to explicitly declare the visibility for methods.

{
  $this->page++;
  $this->pages[$this->page]='';
  $this->state=2;
  $this->x=$this->lMargin;
  $this->y=$this->tMargin;
  $this->FontFamily='';
  //Page orientation
  if(!$orientation)
    $orientation=$this->DefOrientation;
  else
  {
    $orientation=strtoupper($orientation{0});
    if($orientation!=$this->DefOrientation)
      $this->OrientationChanges[$this->page]=true;
  }
  if($orientation!=$this->CurOrientation)
  {
    //Change orientation
    if($orientation=='P')
    {
      $this->wPt=$this->fwPt;
      $this->hPt=$this->fhPt;
      $this->w=$this->fw;
      $this->h=$this->fh;
    }
    else
    {
      $this->wPt=$this->fhPt;
      $this->hPt=$this->fwPt;
      $this->w=$this->fh;
      $this->h=$this->fw;
    }
    $this->PageBreakTrigger=$this->h-$this->bMargin;
    $this->CurOrientation=$orientation;
  }
}

function _endpage()

It is generally recommended to explicitly declare the visibility for methods.

{
  //End of page contents
  $this->state=1;
}

function _newobj()

It is generally recommended to explicitly declare the visibility for methods.

{
  //Begin a new object
  $this->n++;
  $this->offsets[$this->n]=strlen($this->buffer);
  $this->_out($this->n.' 0 obj');
}

function _dounderline($x,$y,$txt)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Underline text
  $up=$this->CurrentFont['up'];
  $ut=$this->CurrentFont['ut'];
  $w=$this->GetStringWidth($txt)+$this->ws*substr_count($txt,' ');

  return sprintf('%.2f %.2f %.2f %.2f re f',$x*$this->k,($this->h-($y-$up/1000*$this->FontSize))*$this->k,$w*$this->k,-$ut/1000*$this->FontSizePt);
}

function _parsejpg($file)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Extract info from a JPEG file
  $a=GetImageSize($file);
  if(!$a)

The expression $a of type array is implicitly converted to a boolean; are you sure this is intended? If so, consider using empty($expr) instead to make it clear that you intend to check for an array without elements.

    $this->Error('Missing or incorrect image file: '.$file);
  if($a[2]!=2)
    $this->Error('Not a JPEG file: '.$file);
  if(!isset($a['channels']) || $a['channels']==3)
    $colspace='DeviceRGB';
  elseif($a['channels']==4)
    $colspace='DeviceCMYK';
  else
    $colspace='DeviceGray';
  $bpc=isset($a['bits']) ? $a['bits'] : 8;
  //Read whole file
  $f=fopen($file,'rb');
  $data='';
  while(!feof($f))
    $data.=fread($f,4096);
  fclose($f);

  return array('w'=>$a[0],'h'=>$a[1],'cs'=>$colspace,'bpc'=>$bpc,'f'=>'DCTDecode','data'=>$data);
}

function _parsepng($file)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Extract info from a PNG file
  $f=fopen($file,'rb');
  if(!$f)
    $this->Error('Can\'t open image file: '.$file);
  //Check signature
  if(fread($f,8)!=chr(137).'PNG'.chr(13).chr(10).chr(26).chr(10))
    $this->Error('Not a PNG file: '.$file);
  //Read header chunk
  fread($f,4);
  if(fread($f,4)!='IHDR')
    $this->Error('Incorrect PNG file: '.$file);
  $w=$this->_freadint($f);
  $h=$this->_freadint($f);
  $bpc=ord(fread($f,1));
  if($bpc>8)
    $this->Error('16-bit depth not supported: '.$file);
  $ct=ord(fread($f,1));
  if($ct==0)
    $colspace='DeviceGray';
  elseif($ct==2)
    $colspace='DeviceRGB';
  elseif($ct==3)
    $colspace='Indexed';
  else
    $this->Error('Alpha channel not supported: '.$file);
  if(ord(fread($f,1))!=0)
    $this->Error('Unknown compression method: '.$file);
  if(ord(fread($f,1))!=0)
    $this->Error('Unknown filter method: '.$file);
  if(ord(fread($f,1))!=0)
    $this->Error('Interlacing not supported: '.$file);
  fread($f,4);
  $parms='/DecodeParms <</Predictor 15 /Colors '.($ct==2 ? 3 : 1).' /BitsPerComponent '.$bpc.' /Columns '.$w.'>>';
  //Scan chunks looking for palette, transparency and image data
  $pal='';
  $trns='';
  $data='';
  do
  {
    $n=$this->_freadint($f);
    $type=fread($f,4);
    if($type=='PLTE')
    {
      //Read palette
      $pal=fread($f,$n);
      fread($f,4);
    }
    elseif($type=='tRNS')
    {
      //Read transparency info
      $t=fread($f,$n);
      if($ct==0)
        $trns=array(ord(substr($t,1,1)));
      elseif($ct==2)
        $trns=array(ord(substr($t,1,1)),ord(substr($t,3,1)),ord(substr($t,5,1)));
      else
      {
        $pos=strpos($t,chr(0));
        if($pos!==false)
          $trns=array($pos);
      }
      fread($f,4);
    }
    elseif($type=='IDAT')
    {
      //Read image data block
      $data.=fread($f,$n);
      fread($f,4);
    }
    elseif($type=='IEND')
      break;
    else
      fread($f,$n+4);
  }
  while($n);
  if($colspace=='Indexed' && empty($pal))

The variable $colspace does not seem to be defined for all execution paths leading up to this point.

    $this->Error('Missing palette in '.$file);
  fclose($f);

  return array('w'=>$w,'h'=>$h,'cs'=>$colspace,'bpc'=>$bpc,'f'=>'FlateDecode','parms'=>$parms,'pal'=>$pal,'trns'=>$trns,'data'=>$data);
}

function _freadint($f)

The return type could not be reliably inferred; please add a @return annotation.

It is generally recommended to explicitly declare the visibility for methods.

{
  //Read a 4-byte integer from file
  $a=unpack('Ni',fread($f,4));

  return $a['i'];
}

function _textstring($s)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Format a text string
  return '('.$this->_escape($s).')';
}

function _escape($s)

The return type could not be reliably inferred; please add a @return annotation.

It is generally recommended to explicitly declare the visibility for methods.

{
  //Add \ before \, ( and )
  return str_replace(')','\\)',str_replace('(','\\(',str_replace('\\','\\\\',$s)));
}

function _putstream($s)

It is generally recommended to explicitly declare the visibility for methods.

{
  $this->_out('stream');
  $this->_out($s);
  $this->_out('endstream');
}

function _out($s)

It is generally recommended to explicitly declare the visibility for methods.

{
  //Add a line to the document
  if($this->state==2)
    $this->pages[$this->page].=$s."\n";
  else
    $this->buffer.=$s."\n";
}
//End of class
}

//Handle special IE contype request
if(isset($_SERVER['HTTP_USER_AGENT']) && $_SERVER['HTTP_USER_AGENT']=='contype')
{
  header('Content-Type: application/pdf');
  exit;
}

}