PHP和mySQL从数据库上传pdf格式的图像

我试图以pdf格式显示MySQL表中的图像。I当我执行代码时，我收到以下错误：

---

连接建立数据库选择查询：从id=31的用户处选择*执行FPDF错误：不支持的图像类型：/Û7úwè（ê-Òº您必须使用

MemImage

功能来显示图像的

blob

数据

$pdf->MemImage($url, 50, 30);

编辑

来源

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

//Stream handler to read from global variables
class VariableStream
{
var $varname;
var $position;

function stream_open($path, $mode, $options, &$opened_path)
{
    $url = parse_url($path);
    $this->varname = $url['host'];
    if(!isset($GLOBALS[$this->varname]))
    {
        trigger_error('Global variable '.$this->varname.' does not exist', E_USER_WARNING);
        return false;
    }
    $this->position = 0;
    return true;
}

function stream_read($count)
{
    $ret = substr($GLOBALS[$this->varname], $this->position, $count);
    $this->position += strlen($ret);
    return $ret;
}

function stream_eof()
{
    return $this->position >= strlen($GLOBALS[$this->varname]);
}

function stream_tell()
{
    return $this->position;
}

function stream_seek($offset, $whence)
{
    if($whence==SEEK_SET)
    {
        $this->position = $offset;
        return true;
    }
    return false;
}

function stream_stat()
{
    return array();
}
}

class PDF_MemImage extends FPDF
{
function PDF_MemImage($orientation='P', $unit='mm', $format='A4')
{
    $this->FPDF($orientation, $unit, $format);
    //Register var stream protocol
    stream_wrapper_register('var', 'VariableStream');
}

function MemImage($data, $x=null, $y=null, $w=0, $h=0, $link='')
{
    //Display the image contained in $data
    $v = 'img'.md5($data);
    $GLOBALS[$v] = $data;
    $a = getimagesize('var://'.$v);
    if(!$a)
        $this->Error('Invalid image data');
    $type = substr(strstr($a['mime'],'/'),1);
    $this->Image('var://'.$v, $x, $y, $w, $h, $type, $link);
    unset($GLOBALS[$v]);
}

function GDImage($im, $x=null, $y=null, $w=0, $h=0, $link='')
{
    //Display the GD image associated to $im
    ob_start();
    imagepng($im);
    $data = ob_get_clean();
    $this->MemImage($data, $x, $y, $w, $h, $link);
}
}
?>

范例

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

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

//Load an image into a variable
$logo = file_get_contents('logo.jpg');
//Output it
$pdf->MemImage($logo, 50, 30);

//Create a GD graphics
$im = imagecreate(200, 150);
$bgcolor = imagecolorallocate($im, 255, 255, 255);
$bordercolor = imagecolorallocate($im, 0, 0, 0);
$color1 = imagecolorallocate($im, 255, 0, 0);
$color2 = imagecolorallocate($im, 0, 255, 0);
$color3 = imagecolorallocate($im, 0, 0, 255);
imagefilledrectangle($im, 0, 0, 199, 149, $bgcolor);
imagerectangle($im, 0, 0, 199, 149, $bordercolor);
imagefilledrectangle($im, 30, 100, 60, 148, $color1);
imagefilledrectangle($im, 80, 80, 110, 148, $color2);
imagefilledrectangle($im, 130, 40, 160, 148, $color3);
//Output it
$pdf->GDImage($im, 120, 25, 40);
imagedestroy($im);

$pdf->Output();
?>

---

您必须使用

MemImage

功能来显示图像的

blob

数据

$pdf->MemImage($url, 50, 30);

编辑

来源

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

//Stream handler to read from global variables
class VariableStream
{
var $varname;
var $position;

function stream_open($path, $mode, $options, &$opened_path)
{
    $url = parse_url($path);
    $this->varname = $url['host'];
    if(!isset($GLOBALS[$this->varname]))
    {
        trigger_error('Global variable '.$this->varname.' does not exist', E_USER_WARNING);
        return false;
    }
    $this->position = 0;
    return true;
}

function stream_read($count)
{
    $ret = substr($GLOBALS[$this->varname], $this->position, $count);
    $this->position += strlen($ret);
    return $ret;
}

function stream_eof()
{
    return $this->position >= strlen($GLOBALS[$this->varname]);
}

function stream_tell()
{
    return $this->position;
}

function stream_seek($offset, $whence)
{
    if($whence==SEEK_SET)
    {
        $this->position = $offset;
        return true;
    }
    return false;
}

function stream_stat()
{
    return array();
}
}

class PDF_MemImage extends FPDF
{
function PDF_MemImage($orientation='P', $unit='mm', $format='A4')
{
    $this->FPDF($orientation, $unit, $format);
    //Register var stream protocol
    stream_wrapper_register('var', 'VariableStream');
}

function MemImage($data, $x=null, $y=null, $w=0, $h=0, $link='')
{
    //Display the image contained in $data
    $v = 'img'.md5($data);
    $GLOBALS[$v] = $data;
    $a = getimagesize('var://'.$v);
    if(!$a)
        $this->Error('Invalid image data');
    $type = substr(strstr($a['mime'],'/'),1);
    $this->Image('var://'.$v, $x, $y, $w, $h, $type, $link);
    unset($GLOBALS[$v]);
}

function GDImage($im, $x=null, $y=null, $w=0, $h=0, $link='')
{
    //Display the GD image associated to $im
    ob_start();
    imagepng($im);
    $data = ob_get_clean();
    $this->MemImage($data, $x, $y, $w, $h, $link);
}
}
?>

范例

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

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

//Load an image into a variable
$logo = file_get_contents('logo.jpg');
//Output it
$pdf->MemImage($logo, 50, 30);

//Create a GD graphics
$im = imagecreate(200, 150);
$bgcolor = imagecolorallocate($im, 255, 255, 255);
$bordercolor = imagecolorallocate($im, 0, 0, 0);
$color1 = imagecolorallocate($im, 255, 0, 0);
$color2 = imagecolorallocate($im, 0, 255, 0);
$color3 = imagecolorallocate($im, 0, 0, 255);
imagefilledrectangle($im, 0, 0, 199, 149, $bgcolor);
imagerectangle($im, 0, 0, 199, 149, $bordercolor);
imagefilledrectangle($im, 30, 100, 60, 148, $color1);
imagefilledrectangle($im, 80, 80, 110, 148, $color2);
imagefilledrectangle($im, 130, 40, 160, 148, $color3);
//Output it
$pdf->GDImage($im, 120, 25, 40);
imagedestroy($im);

$pdf->Output();
?>

谢谢，但它显示了致命错误：调用未定义的方法FPDF:：MemImage（）@DominicSeb-Ohh，忘记包含所需的函数，转到提供的url，它包含完整的代码。：）嘿，谢谢..但是我下载了整个代码，我做了如下操作..包括了所需的函数，但仍然是相同的错误谢谢，但上面说的是致命错误：调用未定义的方法FPDF:：MemImage（）@DominicSeb Ohh，忘记包含必需的函数，转到提供的url，它包含完整的代码。：）嘿，谢谢..但是我下载了完整的代码，我做了如下操作..包含必需的函数，但仍然是相同的错误