我的查询中有三列，如果扩展过度，则第一列。所以我想修改calcwidths函数，使第二列的宽度减小。或者修改整个表，使其根据单元格内容进行调整。
请确切地告诉我该做什么，因为我不太懂fpdf。谢谢您。

<?php
require('fpdf.php');

class PDF_MySQL_Table extends FPDF
{
protected $ProcessingTable=false;
protected $aCols=array();
protected $TableX;
protected $HeaderColor;
protected $RowColors;
protected $ColorIndex;

function Header()
{
// Print the table header if necessary
if($this->ProcessingTable)
    $this->TableHeader();
}

function TableHeader()
{
$this->SetFont('Arial','B',12);
$this->SetX($this->TableX);
$fill=!empty($this->HeaderColor);
if($fill)
$this->SetFillColor($this->HeaderColor[0],$this->HeaderColor[1],$thisHeaderColor[2]);
foreach($this->aCols as $col)
    $this->Cell($col['w'],6,$col['c'],1,0,'C',$fill);
$this->Ln();
}

function Row($data)
{
$this->SetX($this->TableX);
$ci=$this->ColorIndex;
$fill=!empty($this->RowColors[$ci]);
if($fill)
    $this->SetFillColor($this->RowColors[$ci][0],$this->RowColors[$ci][1],$this->RowColors[$ci][2]);
foreach($this->aCols as $col)
    $this->Cell($col['w'],5,$data[$col['f']],1,0,$col['a'],$fill);
$this->Ln();
$this->ColorIndex=1-$ci;
}

function CalcWidths($width, $align)
{
// Compute the widths of the columns
$TableWidth=0;
foreach($this->aCols as $i=>$col)
{
    $w=$col['w'];
    if($w==-1)
        $w=$width/count($this->aCols);
    elseif(substr($w,-1)=='%')
        $w=$w/100*$width;
    $this->aCols[$i]['w']=$w;
    $TableWidth+=$w;
}
// Compute the abscissa of the table
if($align=='C')
    $this->TableX=max(($this->w-$TableWidth)/2,0);
elseif($align=='R')
    $this->TableX=max($this->w-$this->rMargin-$TableWidth,0);
else
    $this->TableX=$this->lMargin;
}

function AddCol($field=-1, $width=-1, $caption='', $align='L')
{
// Add a column to the table
if($field==-1)
    $field=count($this->aCols);
$this->aCols[]=array('f'=>$field,'c'=>$caption,'w'=>$width,'a'=>$align);
}

function Table($con, $query, $prop=array())
{
// Execute query
$res=mysqli_query($con,$query) or die('Error: '.mysqli_error($con)."    <br>Query: $query");
// Add all columns if none was specified
if(count($this->aCols)==0)
{
    $nb=mysqli_num_fields($res);
    for($i=0;$i<$nb;$i++)
        $this->AddCol();
}
// Retrieve column names when not specified
foreach($this->aCols as $i=>$col)
{
    if($col['c']=='')
    {
        if(is_string($col['f']))
            $this->aCols[$i]['c']=ucfirst($col['f']);
        else
            $this->aCols[$i]['c']=ucfirst(mysqli_fetch_field_direct($res,$col['f'])->name);
    }
}
// Handle properties
if(!isset($prop['width']))
    $prop['width']=0;
if($prop['width']==0)
    $prop['width']=$this->w-$this->lMargin-$this->rMargin;
if(!isset($prop['align']))
    $prop['align']='C';
if(!isset($prop['padding']))
    $prop['padding']=$this->cMargin;
$cMargin=$this->cMargin;
$this->cMargin=$prop['padding'];
if(!isset($prop['HeaderColor']))
    $prop['HeaderColor']=array();
$this->HeaderColor=$prop['HeaderColor'];
if(!isset($prop['color1']))
    $prop['color1']=array();
if(!isset($prop['color2']))
    $prop['color2']=array();
$this->RowColors=array($prop['color1'],$prop['color2']);
// Compute column widths
$this->CalcWidths($prop['width'],$prop['align']);
// Print header
$this->TableHeader();
// Print rows
$this->SetFont('Arial','',11);
$this->ColorIndex=0;
$this->ProcessingTable=true;
while($row=mysqli_fetch_array($res))
    $this->Row($row);
$this->ProcessingTable=false;
$this->cMargin=$cMargin;
$this->aCols=array();
}
}
?>

<?php
session_start();

class PDF extends PDF_MySQL_Table
{
function Header()
{
// Title
$this->SetFont('Arial','',18);
$this->Cell(0,6,'Server/URL Details',0,1,'C');
$this->Ln(10);
// Ensure table header is printed
parent::Header();
}
}

$pdf = new PDF();
$pdf->AddPage();

$query = "SELECT DISTINCT Server_Name,Server_Status,Server_Type FROM server where ENV_NAME='{$_SESSION['envt_name']}' && ENV_TYPE = '{$_SESSION['envt_type']}'";

$pdf->Table($con,$query);
$pdf->AddPage();
$querytwo = "SELECT DISTINCT URL_Name,URL_Status,URL_Type FROM url where     ENV_NAME='{$_SESSION['envt_name']}' && ENV_TYPE = '{$_SESSION['envt_type']}'";
$pdf->Table($con,$querytwo);
$pdf->Output();
?>