我有用户上传的PDF文档需要审计人员处理。有时，PDF中的扫描页面是横向或上下颠倒的。如何使用php旋转页面?
我使用TCPDF和TCPDI，我认为它们与fpdf/fpdi相同
下面的代码可以很好地旋转所有页面，但是当我只指定一个页面时，假设是5页中的第3页。它将保留第1页和第2页，旋转第3页，并将继续旋转第4页和第5页。为什么?
还有，这段代码有意义吗?这样做是正确的还是有更简单的方法?
function rotatePDF($file, $degrees, $page = 'all'){
$pdf = new TCPDI(); // new object
$pdf->setPrintHeader(false); // no headers
$pdf->setPrintFooter(false); // no footers
$pagecount = $pdf->setSourceFile($file); //the original file
// rotate all - THIS WORKS FINE
if($page=="all"){
for ($i = 1; $i <= $pagecount; $i++) {
$pageformat = array('Rotate'=>$degrees);
$tpage = $pdf->importPage($i);
$size = $pdf->getTemplateSize($tpage);
// get original page orientation
$orientation = $size['w'] > $size['h'] ? 'L' : 'P';
$pdf->AddPage($orientation,$pageformat);
$pdf->useTemplate($tpage);
}
}else{
for ($i = 1; $i <= $pagecount; $i++) {
if($page == $i){
$pageformat = array('Rotate'=>$degrees);
$tpage = $pdf->importPage($i);
$size = $pdf->getTemplateSize($tpage);
// get original page orientation
$orientation = $size['w'] > $size['h'] ? 'L' : 'P';
$pdf->AddPage($orientation,$pageformat);
$pdf->useTemplate($tpage);
}else{
$tpage = $pdf->importPage($i);
$pdf->AddPage();
$pdf->useTemplate($tpage);
}
}
}
$out = realpath($file);
if(rename($file,"files/1/file.bak")){
$result = $pdf->Output($out, "F");
if($result == "" ){
echo "ok";
}
}else{
echo "Failed to rename old PDF";
die;
}
}
$file = "files/1/1.pdf";
rotatePDF($file,90); // rotating all works fine
rotatePDF($file,90,3); // rotates page 3 AND all following
经过多次尝试和错误的旋转，我找到了它。下面是代码:
function rotatePDF($file, $degrees, $page = 'all'){
$pdf = new TCPDI();
$pdf->setPrintHeader(false);
$pdf->setPrintFooter(false);
$pagecount = $pdf->setSourceFile($file);
// rotate each page
if($page=="all"){
for ($i = 1; $i <= $pagecount; $i++) {
$pageformat = array('Rotate'=>$degrees);
$tpage = $pdf->importPage($i);
$size = $pdf->getTemplateSize($tpage);
//$info = $pdf->getPageDimensions();
$orientation = $size['w'] > $size['h'] ? 'L' : 'P';
$pdf->AddPage($orientation,$pageformat);
$pdf->useTemplate($tpage);
}
}else{
$rotateFlag = 0;
for ($i = 1; $i <= $pagecount; $i++) {
if($page == $i){
$pageformat = array('Rotate'=>$degrees);
$tpage = $pdf->importPage($i);
$size = $pdf->getTemplateSize($tpage);
//$info = $pdf->getPageDimensions();
$orientation = $size['w'] > $size['h'] ? 'L' : 'P';
$pdf->AddPage($orientation,$pageformat);
$pdf->useTemplate($tpage);
$rotateFlag = 1;
}else{
if($rotateFlag==1){
// page after rotation; restore rotation
$rotateFlag = 0;
$pageformat = array('Rotate'=>0);
$tpage = $pdf->importPage($i);
$pdf->AddPage($orientation,$pageformat);
$pdf->useTemplate($tpage);
}else{
// pages before rotation and after restoring rotation
$tpage = $pdf->importPage($i);
$pdf->AddPage();
$pdf->useTemplate($tpage);
}
}
}
}
$out = realpath($file);
if(rename($file,"files/1/file.bak")){
$result = $pdf->Output($out, "F");
if($result == "" ){
echo "ok";
}
}else{
echo "Failed to rename old PDF";
die;
}
}
$file = "files/1/1.pdf";
rotatePDF($file,90); // rotating all works fine
rotatePDF($file,180,3); // rotates only page 3