Swap in replacement for Event Espresso 3's invoice function.pdf.php file.

function.pdf.php

<?php
global $org_options;
if(getCountryZoneId($org_options['organization_country']) == '2'){
	$currency_sign = 'EUR ';
}else{
	$currency_sign = html_entity_decode( $org_options[ 'currency_symbol' ], ENT_QUOTES, 'ISO-8859-15' );
}
class Espresso_PDF extends Espresso_FPDF{
	//Page header
	function Header(){
		global $org_options;
		$invoice_payment_settings = get_option('event_espresso_invoice_payment_settings');
		//Logo
		if (isset($invoice_payment_settings['image_url'])&&trim($invoice_payment_settings['image_url']) !=''){
			$this->Image($invoice_payment_settings['image_url'],10,8,90);//Set the logo if it is available
		}else{
			$this->SetFont('Arial','B',15);
			$this->Cell(10,10,pdftext($org_options['organization']),0,0,'L');//If no logo, then display the organizatin name
		}

		//Arial bold 15
		$this->SetFont('Arial','B',15);
		//Move to the right
		$this->Cell(80);
		//Title
		if(isset($invoice_payment_settings['pdf_title']))
			$this->MultiCell(100,10,pdftext($invoice_payment_settings['pdf_title']),0,'R');//Set the right header
		else
			$this->MultiCell(100,10,pdftext(''),0,'R');//Set the right header
		//Line break
		$this->Ln(20);
	}

	function LoadData($file){
		$lines=$file;
		$data=array();
		foreach($lines as $line)
			$data[]=explode(';',chop($line));
		return $data;
	}

	//Better table
	function ImprovedTable($header,$event_data,$w=array(100,35,40)){
		global $org_options, $currency_sign;

		//Column widths
		//Header
		for($i=0;$i<count($header);$i++)
			$this->Cell($w[$i],7,$header[$i],1,0,'C');
		$this->Ln();
		$x = $this->GetX();
		$y = $this->GetY();
		//Data
		$counter = 0;
		foreach($event_data as $data){
			$counter++;
			if($counter == 24) {
				$this->AddPage();
				$counter = 0;
			}
			foreach($data as $row){
				$y1 = $this->GetY();
				$this->MultiCell($w[0],6,$row[0],'LBR');
				$y2 = $this->GetY();
				$yH = $y2 - $y1;
				$this->SetXY($x + $w[0], $this->GetY() - $yH);
				$this->Cell($w[1],$yH,$row[1],'LBR',0,'C');
				$this->Cell($w[2],$yH,$row[2],'LBR',0,'C');
				if( isset( $row[3] ) ){
					$this->Cell($w[3],$yH, $currency_sign.number_format($row[3],2, '.', ''),'LBR',0,'C');
				}
				if( isset( $row[4] ) ){
					$this->Cell($w[4],$yH, $currency_sign.number_format($row[4],2, '.', ''),'LBR',0,'C');
				}
				$this->Ln();
			}
		}
		$this->Cell(array_sum($w),0,'','T');
	}

	function InvoiceTotals($text,$total_cost,$left_cell = 125, $right_cell = 35){
		global $org_options, $currency_sign;
		$this->SetFillColor(192,192,192);
		$this->Cell($left_cell, 10, $text, 0, 0, 'R');
		$minus = '';
		if ( $total_cost < 0 ){
			$minus = '-';
			$total_cost = (-1)*$total_cost;
		}
		$this->Cell($right_cell, 10, $minus.$currency_sign.number_format($total_cost,2, '.', ''), 0, 1, 'C');
	}
	//Page footer
	function Footer(){
		//Position at 1.5 cm from bottom
		$this->SetY(-15);
		//Arial italic 8
		$this->SetFont('Arial','I',8);
		//Page number
		$this->Cell(0,10, __('Page','event_espresso').$this->PageNo().'/{nb}',0,0,'C');
	}
}

//Build the PDF
function pdftext($val){
	return iconv("UTF-8", "ISO-8859-1",stripslashes_deep($val));
}