QR CODE 不打印
QR CODE not printing
我生成了一个以url作为数据内容的二维码,但是当我尝试打印生成二维码的页面时,二维码似乎没有出现,但其他内容显示。这是我的片段
<?php
require_once("qrcode.php");
//---------------------------------------------------------
$qr = new QRCode();
// ƒGƒ‰[’ù³ƒŒƒxƒ‹‚ðÝ’è
// QR_ERROR_CORRECT_LEVEL_L : 7%
// QR_ERROR_CORRECT_LEVEL_M : 15%
// QR_ERROR_CORRECT_LEVEL_Q : 25%
// QR_ERROR_CORRECT_LEVEL_H : 30%
$qr->setErrorCorrectLevel(QR_ERROR_CORRECT_LEVEL_L);
$qr->setTypeNumber(4);
$qr->addData("http:/".$_SERVER['REQUEST_URI']."");
$qr->make();
//---------------------------------------------------------
?>
以下为本页其他内容
<div class="invoice-box" id="invoice-box">
<table cellpadding="0" cellspacing="0">
<tr class="top">
<td colspan="2">
<table>
<tr>
<td class="title">
<img src="images/logo.png" style="width:100%; max-width:200px; height:95px;">
</td>
<td>
Invoice #: <?php print $invoice_details->sub_code ?><br>
Created: <?php print date('Y/M/d', strtotime($invoice_details->paid_date)) ?><br>
Due: February 1, 2015
</td>
</tr>
</table>
</td>
</tr>
<tr class="information">
<td colspan="2">
<table>
<tr>
<td>
<br>
<br>
</td>
<td>
<?php print $invoice_details->org ?><br>
<?php print $invoice_details->lname ?> <?php print $invoice_details->fname ?><br>
<?php print $invoice_details->email ?>
</td>
<td>
<?php $qr->printHTML(); ?>
</td>
</tr>
</table>
</td>
</tr>
<tr class="heading">
<td>
Payment Method
</td>
<td>
</td>
</tr>
<tr class="details">
<td>
<?php print $invoice_details->method ?>
</td>
<td>
</td>
</tr>
<tr class="heading">
<td>
Item
</td>
<td>
Price(UGX)
</td>
</tr>
<tr class="item">
<td>
<?php print ucfirst($invoice_details->event) ?> - Summit
</td>
<td>
<?php print number_format($invoice_details->amount) ?>
</td>
</tr>
<tr class="total">
<td></td>
<td>
Total: UGX <?php print number_format($invoice_details->amount) ?>
</td>
</tr>
</table>
</div>
<input type="button" value="Print Div" onclick="PrintElem('#invoice-box')" />
和我的打印脚本
<script type="text/javascript">
function PrintElem(elem)
{
Popup($(elem).html());
}
function Popup(data)
{
var mywindow = window.open('', 'invoice-box', 'height=400,width=600');
mywindow.document.write('<html><head><title>my div</title>');
/*optional stylesheet*/ //mywindow.document.write('<link rel="stylesheet" href="main.css" type="text/css" />');
mywindow.document.write('</head><body >');
mywindow.document.write(data);
mywindow.document.write('</body></html>');
mywindow.document.close(); // necessary for IE >= 10
mywindow.focus(); // necessary for IE >= 10
mywindow.print();
mywindow.close();
return true;
}
</script>
您似乎正在尝试打印默认情况下从打印中删除的黑色背景色。不幸的是,在 Safari 和 Chrome 以外的浏览器中,无法以编程方式将其强制返回。
您可以通过执行以下操作强制返回 Safari 和 Chrome:
<div class="invoice-box" id="invoice-box">
<style>
.invoice-box table td: {
-webkit-print-color-adjust: exact !important;
}
</style>
<table cellpadding="0" cellspacing="0">
<tr class="top">
<td colspan="2">
<table>
<tr>
<td class="title">
<img src="images/logo.png" style="width:100%; max-width:200px; height:95px;">
</td>
<td>
Invoice #: <?php print $invoice_details->sub_code ?><br>
Created: <?php print date('Y/M/d', strtotime($invoice_details->paid_date)) ?><br>
Due: February 1, 2015
</td>
</tr>
</table>
</td>
</tr>
<tr class="information">
<td colspan="2">
<table>
<tr>
<td>
<br>
<br>
</td>
<td>
<?php print $invoice_details->org ?><br>
<?php print $invoice_details->lname ?> <?php print $invoice_details->fname ?><br>
<?php print $invoice_details->email ?>
</td>
<td>
<?php $qr->printHTML(); ?>
</td>
</tr>
</table>
</td>
</tr>
<tr class="heading">
<td>
Payment Method
</td>
<td>
</td>
</tr>
<tr class="details">
<td>
<?php print $invoice_details->method ?>
</td>
<td>
</td>
</tr>
<tr class="heading">
<td>
Item
</td>
<td>
Price(UGX)
</td>
</tr>
<tr class="item">
<td>
<?php print ucfirst($invoice_details->event) ?> - Summit
</td>
<td>
<?php print number_format($invoice_details->amount) ?>
</td>
</tr>
<tr class="total">
<td></td>
<td>
Total: UGX <?php print number_format($invoice_details->amount) ?>
</td>
</tr>
</table>
</div>
<input type="button" value="Print Div" onclick="PrintElem('#invoice-box')" />
不幸的是,对于 IE 和 Firefox 等浏览器,这需要用户交互。请参阅此问题以获得更多答案:Printing background-color in Firefox and IE
假设我找到了正确的库,它有一个 image creator。您需要做的是在 imagegif
(或 imagepng
)调用周围使用输出缓冲区将图像的二进制数据捕获到字符串中,然后对字符串进行 base64 编码,并将其作为数据的一部分回显URI 直接在 img 标签的 src 属性中。
$img = $qr->createImage(4, 2);
ob_start();
imagegif($img);
imagedestroy($img);
$img = ob_get_clean();
在你的HTML
<img src="data:image/gif;base64,<?php echo base64_encode($img);?>">
如果您担心对数据 URL 的支持,请忽略输出缓冲,添加一个唯一的随机文件名作为 imagegif
调用的第二个参数以保存它,然后在src
.
最后,我找到了解决方法,这是我的解决方案
<?php
require_once("qrcode.php");
$qr = QRCode::getMinimumQRCode("http:/".$_SERVER['REQUEST_URI']."", QR_ERROR_CORRECT_LEVEL_L);
$img = $qr->createImage(4, 2);
ob_start();
imagegif($img);
imagedestroy($img);
$img = ob_get_clean();
?>
然后用这个输出二维码为图片;
<img src="data:image/gif;base64,<?php echo base64_encode($img);?>">
感谢@walf 以某种方式提供的解决方案,希望它对其他人有所帮助。
我生成了一个以url作为数据内容的二维码,但是当我尝试打印生成二维码的页面时,二维码似乎没有出现,但其他内容显示。这是我的片段
<?php
require_once("qrcode.php");
//---------------------------------------------------------
$qr = new QRCode();
// ƒGƒ‰[’ù³ƒŒƒxƒ‹‚ðÝ’è
// QR_ERROR_CORRECT_LEVEL_L : 7%
// QR_ERROR_CORRECT_LEVEL_M : 15%
// QR_ERROR_CORRECT_LEVEL_Q : 25%
// QR_ERROR_CORRECT_LEVEL_H : 30%
$qr->setErrorCorrectLevel(QR_ERROR_CORRECT_LEVEL_L);
$qr->setTypeNumber(4);
$qr->addData("http:/".$_SERVER['REQUEST_URI']."");
$qr->make();
//---------------------------------------------------------
?>
以下为本页其他内容
<div class="invoice-box" id="invoice-box">
<table cellpadding="0" cellspacing="0">
<tr class="top">
<td colspan="2">
<table>
<tr>
<td class="title">
<img src="images/logo.png" style="width:100%; max-width:200px; height:95px;">
</td>
<td>
Invoice #: <?php print $invoice_details->sub_code ?><br>
Created: <?php print date('Y/M/d', strtotime($invoice_details->paid_date)) ?><br>
Due: February 1, 2015
</td>
</tr>
</table>
</td>
</tr>
<tr class="information">
<td colspan="2">
<table>
<tr>
<td>
<br>
<br>
</td>
<td>
<?php print $invoice_details->org ?><br>
<?php print $invoice_details->lname ?> <?php print $invoice_details->fname ?><br>
<?php print $invoice_details->email ?>
</td>
<td>
<?php $qr->printHTML(); ?>
</td>
</tr>
</table>
</td>
</tr>
<tr class="heading">
<td>
Payment Method
</td>
<td>
</td>
</tr>
<tr class="details">
<td>
<?php print $invoice_details->method ?>
</td>
<td>
</td>
</tr>
<tr class="heading">
<td>
Item
</td>
<td>
Price(UGX)
</td>
</tr>
<tr class="item">
<td>
<?php print ucfirst($invoice_details->event) ?> - Summit
</td>
<td>
<?php print number_format($invoice_details->amount) ?>
</td>
</tr>
<tr class="total">
<td></td>
<td>
Total: UGX <?php print number_format($invoice_details->amount) ?>
</td>
</tr>
</table>
</div>
<input type="button" value="Print Div" onclick="PrintElem('#invoice-box')" />
和我的打印脚本
<script type="text/javascript">
function PrintElem(elem)
{
Popup($(elem).html());
}
function Popup(data)
{
var mywindow = window.open('', 'invoice-box', 'height=400,width=600');
mywindow.document.write('<html><head><title>my div</title>');
/*optional stylesheet*/ //mywindow.document.write('<link rel="stylesheet" href="main.css" type="text/css" />');
mywindow.document.write('</head><body >');
mywindow.document.write(data);
mywindow.document.write('</body></html>');
mywindow.document.close(); // necessary for IE >= 10
mywindow.focus(); // necessary for IE >= 10
mywindow.print();
mywindow.close();
return true;
}
</script>
您似乎正在尝试打印默认情况下从打印中删除的黑色背景色。不幸的是,在 Safari 和 Chrome 以外的浏览器中,无法以编程方式将其强制返回。 您可以通过执行以下操作强制返回 Safari 和 Chrome:
<div class="invoice-box" id="invoice-box">
<style>
.invoice-box table td: {
-webkit-print-color-adjust: exact !important;
}
</style>
<table cellpadding="0" cellspacing="0">
<tr class="top">
<td colspan="2">
<table>
<tr>
<td class="title">
<img src="images/logo.png" style="width:100%; max-width:200px; height:95px;">
</td>
<td>
Invoice #: <?php print $invoice_details->sub_code ?><br>
Created: <?php print date('Y/M/d', strtotime($invoice_details->paid_date)) ?><br>
Due: February 1, 2015
</td>
</tr>
</table>
</td>
</tr>
<tr class="information">
<td colspan="2">
<table>
<tr>
<td>
<br>
<br>
</td>
<td>
<?php print $invoice_details->org ?><br>
<?php print $invoice_details->lname ?> <?php print $invoice_details->fname ?><br>
<?php print $invoice_details->email ?>
</td>
<td>
<?php $qr->printHTML(); ?>
</td>
</tr>
</table>
</td>
</tr>
<tr class="heading">
<td>
Payment Method
</td>
<td>
</td>
</tr>
<tr class="details">
<td>
<?php print $invoice_details->method ?>
</td>
<td>
</td>
</tr>
<tr class="heading">
<td>
Item
</td>
<td>
Price(UGX)
</td>
</tr>
<tr class="item">
<td>
<?php print ucfirst($invoice_details->event) ?> - Summit
</td>
<td>
<?php print number_format($invoice_details->amount) ?>
</td>
</tr>
<tr class="total">
<td></td>
<td>
Total: UGX <?php print number_format($invoice_details->amount) ?>
</td>
</tr>
</table>
</div>
<input type="button" value="Print Div" onclick="PrintElem('#invoice-box')" />
不幸的是,对于 IE 和 Firefox 等浏览器,这需要用户交互。请参阅此问题以获得更多答案:Printing background-color in Firefox and IE
假设我找到了正确的库,它有一个 image creator。您需要做的是在 imagegif
(或 imagepng
)调用周围使用输出缓冲区将图像的二进制数据捕获到字符串中,然后对字符串进行 base64 编码,并将其作为数据的一部分回显URI 直接在 img 标签的 src 属性中。
$img = $qr->createImage(4, 2);
ob_start();
imagegif($img);
imagedestroy($img);
$img = ob_get_clean();
在你的HTML
<img src="data:image/gif;base64,<?php echo base64_encode($img);?>">
如果您担心对数据 URL 的支持,请忽略输出缓冲,添加一个唯一的随机文件名作为 imagegif
调用的第二个参数以保存它,然后在src
.
最后,我找到了解决方法,这是我的解决方案
<?php
require_once("qrcode.php");
$qr = QRCode::getMinimumQRCode("http:/".$_SERVER['REQUEST_URI']."", QR_ERROR_CORRECT_LEVEL_L);
$img = $qr->createImage(4, 2);
ob_start();
imagegif($img);
imagedestroy($img);
$img = ob_get_clean();
?>
然后用这个输出二维码为图片;
<img src="data:image/gif;base64,<?php echo base64_encode($img);?>">
感谢@walf 以某种方式提供的解决方案,希望它对其他人有所帮助。