我需要使用PHP为现有PDF文件添加水印。我在Google上搜索过它,但找不到合适的库。如何使用PHP为现有的PDF文件添加水印?
我找到了创建PDF文件预览缩略图的fpdf库,但我不知道它是否将水印添加到现有的PDF文件。任何人都可以建议一个PHP库,可以显示预览并将水印添加到现有的PDF文件?
我需要使用PHP为现有PDF文件添加水印。我在Google上搜索过它,但找不到合适的库。如何使用PHP为现有的PDF文件添加水印?
我找到了创建PDF文件预览缩略图的fpdf库,但我不知道它是否将水印添加到现有的PDF文件。任何人都可以建议一个PHP库,可以显示预览并将水印添加到现有的PDF文件?
通过马克的帮助得到它我们去http://www.fpdf.de/downloads/addons/9/如果你们认为是的,我会将我的答案标记为赢家。
感谢Jyelton的回答我的问题看起来像stackover流无效....
使用FPDF和FPDI类只是一个quick'n'dirty例如:
function PlaceWatermark($file, $text, $xxx, $yyy, $op, $outdir) {
require_once('fpdf.php');
require_once('fpdi.php');
$name = uniqid();
$font_size = 5;
$ts=explode("\n",$text);
$width=0;
foreach ($ts as $k=>$string) {
$width=max($width,strlen($string));
}
$width = imagefontwidth($font_size)*$width;
$height = imagefontheight($font_size)*count($ts);
$el=imagefontheight($font_size);
$em=imagefontwidth($font_size);
$img = imagecreatetruecolor($width,$height);
// Background color
$bg = imagecolorallocate($img, 255, 255, 255);
imagefilledrectangle($img, 0, 0,$width ,$height , $bg);
// Font color
$color = imagecolorallocate($img, 0, 0, 0);
foreach ($ts as $k=>$string) {
$len = strlen($string);
$ypos = 0;
for($i=0;$i<$len;$i++){
$xpos = $i * $em;
$ypos = $k * $el;
imagechar($img, $font_size, $xpos, $ypos, $string, $color);
$string = substr($string, 1);
}
}
imagecolortransparent($img, $bg);
$blank = imagecreatetruecolor($width, $height);
$tbg = imagecolorallocate($blank, 255, 255, 255);
imagefilledrectangle($blank, 0, 0,$width ,$height , $tbg);
imagecolortransparent($blank, $tbg);
if (($op < 0) OR ($op >100)){
$op = 100;
}
imagecopymerge($blank, $img, 0, 0, 0, 0, $width, $height, $op);
imagepng($blank,$name.".png");
// Created Watermark Image
$pdf = new FPDI();
if (file_exists("./".$file)){
$pagecount = $pdf->setSourceFile($file);
} else {
return FALSE;
}
$tpl = $pdf->importPage(1);
$pdf->addPage();
$pdf->useTemplate($tpl, 1, 1, 0, 0, TRUE);
//Put the watermark
$pdf->Image($name.'.png', $xxx, $yyy, 0, 0, 'png');
if ($outdir === TRUE){
return $pdf->Output();
} else {
return $pdf;
}
}
PlaceWatermark("filename.pdf", "This is a lazy, but still simple test\n This should stand on a new line!", 30, 120, 100,TRUE);
用法: PlaceWatermark($filename, $text, $x, $y, $opacity, $directoutput);
$filename
- 你想要的水印文字添加- 要在其中把水印
$text
的PDF的路径 $x
- x坐标,你想要把水印
$y
- y坐标,你想要把水印
$opacity
- 文本
$directoutput
的透明度 - 如果为真功能会输出一个PDF文件,否则将返回$ pdf
正如我已经说过,这是一个非常快速和肮脏的例子,它需要一些改进。
对于任何人在这个职位上绊倒,你可以使用一个for循环
for($i=1; $i <= $pagecount; $i++) {
$tpl = $pdf->importPage($i);
$pdf->addPage();
$pdf->useTemplate($tpl, 1, 1, 0, 0, TRUE);
//Put the watermark
$pdf->Image($name.'.png', $xxx, $yyy, 0, 0, 'png');}
它是一个死链接。 – 2017-12-06 11:39:57
/* index.php */
require('rotation.php');
class PDF extends PDF_Rotate{
protected $_outerText1;// dynamic text
protected $_outerText2;
function setWaterText($txt1="", $txt2=""){
$this->_outerText1 = $txt1;
$this->_outerText2 = $txt2;
}
function Header(){
//Put the watermark
$this->SetFont('Arial','B',40);
$this->SetTextColor(255,192,203);
$this->SetAlpha(0.5);
$this->RotatedText(35,190, $this->_outerText1, 45);
$this->RotatedText(75,190, $this->_outerText2, 45);
}
function RotatedText($x, $y, $txt, $angle){
//Text rotated around its origin
$this->Rotate($angle,$x,$y);
$this->Text($x,$y,$txt);
$this->Rotate(0);
}
}
$file = "path/filename.pdf";// path: file name
$pdf = new PDF();
if (file_exists($file)){
$pagecount = $pdf->setSourceFile($file);
} else {
return FALSE;
}
$pdf->setWaterText("w a t e r M a r k d e m o ", "s e c o n d L i n e o f t e x t");
/* loop for multipage pdf */
for($i=1; $i <= $pagecount; $i++) {
$tpl = $pdf->importPage($i);
$pdf->addPage();
$pdf->useTemplate($tpl, 1, 1, 0, 0, TRUE);
}
$pdf->Output(); //specify path filename to save or keep as it is to view in browser
/* rotation.php */
require('fpdf.php');
require('fpdi.php');
class PDF_Rotate extends FPDI
{
var $angle=0;
var $extgstates = array();
function Rotate($angle,$x=-1,$y=-1)
{
if($x==-1)
$x=$this->x;
if($y==-1)
$y=$this->y;
if($this->angle!=0)
$this->_out('Q');
$this->angle=$angle;
if($angle!=0)
{
$angle*=M_PI/180;
$c=cos($angle);
$s=sin($angle);
$cx=$x*$this->k;
$cy=($this->h-$y)*$this->k;
$this->_out(sprintf('q %.5F %.5F %.5F %.5F %.2F %.2F cm 1 0 0 1 %.2F %.2F cm',$c,$s,-$s,$c,$cx,$cy,-$cx,-$cy));
}
}
function _endpage()
{
if($this->angle!=0)
{
$this->angle=0;
$this->_out('Q');
}
parent::_endpage();
}
function SetAlpha($alpha, $bm='Normal')
{
// set alpha for stroking (CA) and non-stroking (ca) operations
$gs = $this->AddExtGState(array('ca'=>$alpha, 'CA'=>$alpha, 'BM'=>'/'.$bm));
$this->SetExtGState($gs);
}
function AddExtGState($parms)
{
$n = count($this->extgstates)+1;
$this->extgstates[$n]['parms'] = $parms;
return $n;
}
function SetExtGState($gs)
{
$this->_out(sprintf('/GS%d gs', $gs));
}
function _enddoc()
{
if(!empty($this->extgstates) && $this->PDFVersion<'1.4')
$this->PDFVersion='1.4';
parent::_enddoc();
}
function _putextgstates()
{
for ($i = 1; $i <= count($this->extgstates); $i++)
{
$this->_newobj();
$this->extgstates[$i]['n'] = $this->n;
$this->_out('<</Type /ExtGState');
foreach ($this->extgstates[$i]['parms'] as $k=>$v)
$this->_out('/'.$k.' '.$v);
$this->_out('>>');
$this->_out('endobj');
}
}
function _putresourcedict()
{
parent::_putresourcedict();
$this->_out('/ExtGState <<');
foreach($this->extgstates as $k=>$extgstate)
$this->_out('/GS'.$k.' '.$extgstate['n'].' 0 R');
$this->_out('>>');
}
function _putresources()
{
$this->_putextgstates();
parent::_putresources();
}
}
产生更多的网页试图从FPDF示例脚本this.modified脚本。 编辑:添加不透明度使用$ this-> SetAlpha(0.5)
该代码仅适用于一页。我如何更改代码以支持更多输入页面? – jonasl 2011-11-20 20:07:13
只做第1页。修复变更$ tpl = $ pdf-> importPage(1); $ pdf-> addPage(); $ pdf-> useTemplate($ tpl,1,1,0,0,TRUE); – 2016-02-29 03:09:43