Código PHP:
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
function Calcular(){
var b1=document.getElementById("textfield42").value;
var b2 = document.getElementById("textfield43").value;
var b3=b1*b2;
document.getElementById("textfield44").value = b3;
}
</script>
</head>
<body>
<!--Formulario tarifa-->
<div id="frmTarifa" style="position:relative;top:225px;background-color:#4FA700">
<form action="pdf.php" name="frmTarifa" id="frmTarifa"style="background-color:#4FA700" method="Post" >
<table name="frmTarifa" style="width:330px;height:auto;background-color:#B8DC99">
<tr>
<td>
<div><span>Operando 1: </span>
<input type="Text" id="textfield42" name=textfield42 />
<br>
<div><span>Operando 2: </span>
<input type="Text" id="textfield43" name="textfield43" /> </div>
<br>
<div><span>Resultado: </span>
<input type="Text" id="textfield44" name="textfield44" />
<input type="button" name="btnCalcular" onclick="Calcular()" value="Calcular"/>
<input type="submit" id="btnCrearOferta" value="Crear Oferta"/></div>
<br>
</td>
</tr>
</table>
</form>
</div>
</body>
</html>
Código PHP:
$pdf = new PDF('L','mm','A4');
$pdf->AddPage();
$pdf->SetFont('Helvetica','B',12);
$pdf->Text(93,26,utf8_decode('CÓDIGO DE LA OFERTA:'));
$pdf->Text(193,26,utf8_decode('FECHA:'));
$pdf->SetFont('Helvetica','',12);
$pdf->SetXY(145, 21);
$pdf->Cell(45,8,iconv('UTF-8', 'windows-1252',$_POST['textfield42']),0,1,'L');
$pdf->Cell(65,8,iconv('UTF-8', 'windows-1252',$_POST['textfield43']),0,1,'L');
$pdf->Cell(85,8,iconv('UTF-8', 'windows-1252',$_POST['textfield44']),0,1,'L');
$pdf->Output();
"FPDF error: Some data has already been output, can't send PDF file"
Alguna ayuda por favor...
