我无法获得pdf文件作为输出使用php，mysql

Question

我想用fpdf生成PDF文件

但我得到的错误如下: fpdf错误:某些数据已被输出，无法发送pdf文件

<?php
    $indexcontent = mysql_real_escape_string($_GET['index']);
     $detailview = mysql_query("SELECT * FROM `searchengine` WHERE `indexcontent` = '$indexcontent'") or die(mysql_error());
    if($result = mysql_fetch_assoc($detailview))
    {
    $filepdf = $result['maincontent'];
    require('fpdf.php');
    $pdf = new FPDF();
    $pdf->AddPage();
    $pdf->SetFont('Arial','B',16);
    $pdf->Cell(40,10,'$filepdf');
    $pdf->Output();
    }
?>

Answer 1

不要把变量放在单引号之间，尽量放在双引号之间。

Answer 2

试试这个：

<?php
    $indexcontent = mysql_real_escape_string($_GET['index']);
    $detailview = mysql_query("SELECT * FROM `searchengine` WHERE `indexcontent` = '$indexcontent'") or die(mysql_error());
    require('fpdf.php');
    $pdf = new FPDF();
    $pdf->AddPage();
    $pdf->SetFont('Arial','B',16);
    if($result = mysql_fetch_assoc($detailview))
    {
    $filepdf = $result['maincontent'];

    $pdf->Cell(40,10,$filepdf);

    }
    $pdf->Output();

?>