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@johnballantyne
Created November 16, 2012 18:22
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GetMultiCellHeight() script for FPDF
function GetMultiCellHeight($w, $h, $txt, $border=null, $align='J') {
// Calculate MultiCell with automatic or explicit line breaks height
// $border is un-used, but I kept it in the parameters to keep the call
// to this function consistent with MultiCell()
$cw = &$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--;
$sep = -1;
$i = 0;
$j = 0;
$l = 0;
$ns = 0;
$height = 0;
while($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');
}
//Increase Height
$height += $h;
$i++;
$sep = -1;
$j = $i;
$l = 0;
$ns = 0;
continue;
}
if($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');
}
//Increase Height
$height += $h;
}
else
{
if($align=='J')
{
$this->ws = ($ns>1) ? ($wmax-$ls)/1000*$this->FontSize/($ns-1) : 0;
$this->_out(sprintf('%.3F Tw',$this->ws*$this->k));
}
//Increase Height
$height += $h;
$i = $sep+1;
}
$sep = -1;
$j = $i;
$l = 0;
$ns = 0;
}
else
$i++;
}
// Last chunk
if($this->ws>0)
{
$this->ws = 0;
$this->_out('0 Tw');
}
//Increase Height
$height += $h;
return $height;
}
@DenoBY
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DenoBY commented Jun 5, 2019

I had problems calculating if I use big text. I managed to solve it by removing the line $cw = &$this->CurrentFont['cw'];

@dock21
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dock21 commented Jan 5, 2021

I know this may be old but as I used this method, I had an issue on number of chars too. I resolved it by using mb_strlen instead of strlen. It woks prefectly now. Hop this helps and many thanks for the script.

@ericmulovhedzi
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Genius, genius, genius script..

@Clickedu-fchavez
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Thank you so much, I've been looking to solve a bug almost 2 weeks and this is the function I needed. Really appreciate it

@emkowale
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I really want to try this, but I can't get it to work. Do I put the function is a class like this?:

class PDF extends FPDF {
function GetMultiCellHeight($w,$h,$txt,$border,$align){
...
}
}

and call it like this?:

$multiCellHeight=$pdf->GetMultiCellHeight(4,.2,$description,0,'L');

Thanks,
Eric

@oueddadidou
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voici ma methode, c'est du bidouille, mais elle marche bien
`$w = array(8,60, 15, 25,25); // A5
for($i=0;$i<count($header);$i++)
$this->Cell($w[$i],7,$header[$i],1,0,'C',true);
$this->Ln();
// Restauration des couleurs et de la police
$this->SetFillColor(224,235,255);
$this->SetTextColor(0);
// $this->SetFont('');
// Données
$fill = false;

$tableSize = sizeof($data);
$solde = 0;
$l = 1;
for($i = 0 ; $i<$tableSize; $i ++){
	$solde += intval($data[$i]['montant']);
    $posXX0 = $this->getX();
    $this->Cell($w[0],6,'','LRT',0,'C',$fill);
    $posX0 = $this->getX();
    $posY0 = $this->getY();
    $this->MultiCell($w[1],6,$data[$i]['article'],'LRT',0,'C');
    $posY1 = $this->getY();
    $h=   $posY1 - $posY0;
    
    $this->SetXY($posX0 + $w[1], $posY0);
    $this->Cell($w[2], $h,$data[$i]['quantite'],'LRT',0,'C',$fill);
    $this->Cell($w[3], $h,number_format($data[$i]['prix_vente'], 0, '.', ' '),'LRT',0,'C',$fill);
    $this->Cell($w[4], $h,number_format($data[$i]['montant'], 0, '.', ' '),'LRT',0,'C',$fill);
    $this->SetXY($posXX0, $posY0);
    
    $this->Cell($w[0],$h,$l,'LR',0,'C',$fill);
   // $this->Cell(array_sum($w), 0, '', 'T');
    $this->Ln();
    // $fill = !$fill;
    $l += 1;
}`

@ucros
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ucros commented Jun 19, 2023

Thank you very much, it worked for me, although it served me more as a line break counter or the number of lines that a text could have based on the cell width, just by making this change $height++; so that it only counts the lines.
Alternatively, you can change $height to $lines to avoid confusion. :)

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