我正在尝试通过DOMPDF将PHP生成的表单的结果导出为PDF。但是它生成一个空白页。可能是生成的HTML有一些问题。
PHP脚本如下。 Iam只是将HTML输出粘贴到此处，因为PHP文件很长且具有很多功能。所以我想这是HTML格式的问题：
<?php
require_once 'dompdf/autoload.inc.php';
use Dompdf\Dompdf;
?>
<!DOCTYPE html>
<head>
<title>Country Language</title>
</head>
<body>
<?php ob_start(); ?>
<form>
<table border="1"><tr><td><b>Countries Selected</b></td><td><b>Details</b></td><td><b>Amount</b></td></tr>
<tr>
<td rowspan='8'><h2>Australia</h2></td>
</tr>
<tr>
<td> Z</td>
<td>3</td>
</tr>
<tr>
<td> Entity</td>
<td> </td>
</tr>
<tr>
<td> N</td>
<td> 0</td>
</tr>
<tr>
<td>English to English</td>
<td> </td>
</tr>
<tr>
<td> X</td>
<td> 1</td>
</tr>
<tr>
<td> Y</td>
<td> 2</td>
</tr>
<tr>
<td><strong>TOTAL PATENT FEE</strong></td>
<td><b> USD 1400.45</b></td>
</tr>
<tr>
<td rowspan='8'><h2>India</h2></td>
</tr>
<tr>
<td> Z</td>
<td>3</td>
</tr>
<tr>
<td> Entity</td>
<td> Micro</td>
</tr>
<tr>
<td> N</td>
<td> 1</td>
</tr>
<tr>
<td>Arabic to English</td>
<td> </td>
</tr>
<tr>
<td> X</td>
<td> 1</td>
</tr>
<tr>
<td> Y</td>
<td> 2</td>
</tr>
<tr>
<td><strong>TOTAL PATENT FEE</strong></td>
<td><b> USD 315.45</b></td>
</tr>
</table>
<?php
if ( isset( $_GET['pdf'] ) ) {
$html = ob_get_contents();
$html = ob_get_clean();
$dompdf = new DOMPDF();
$dompdf->load_html($html);
$dompdf->setPaper('A4', 'portrait');
$dompdf->render();
$dompdf->stream("the_inquiry.pdf");
}
?>
<div class="shouldPrintToPDF">
<a href="/general/cean/cost-calc5.php?&pdf=1" class="pdflink">Open as PDF</a>
</div>
</form>
</body>
</html>
PHP脚本如下：
<?php
require_once 'dompdf/autoload.inc.php';
use Dompdf\Dompdf;
if (isset($_GET['pdf'])) {
ob_start();
}
else {
?>
<!DOCTYPE html>
<head>
<title>Country Language</title>
</head>
<body>
<form>
<?php
if(isset($_POST['submit'])) {
$language_selected = $_POST['language'];
$claims_selected = $_POST['claims'];
$pages_selected = $_POST['pages'];
$totalwords_selected = $_POST['totalwords'];
$claims_selected = $_POST['claims'];
$entity_selected1 = $_POST['entity_selected'];
//echo '<div class="container">';
echo '<form>';
echo '<table border="1">';
echo '<tr><td><b>Countries Selected</b></td><td><b>Fee Details</b></td><td><b>Amount</b></td></tr>';
foreach ($_POST['check_list'] as $key => $country_checked) {
if(!empty($_POST['entity_selected'][$key])) {
$entity_selected = $_POST['entity_selected'][$key];
} else {
$entity_selected = '';
}
$sql_db = mysqli_query($conn,"SELECT id, country, language, entity FROM country_languages where country = '$country_checked' ");
//$row_db = mysqli_fetch_assoc($sql_db);
while($row_db = mysqli_fetch_array($sql_db)) {
$id = $row_db["id"];
$country = $row_db["country"];
$language = $row_db["language"];
$entity = $row_db["entity"];
if ($language_selected == $language) {
$Z = '0';
} else {
$Z = $totalwords_selected;
}
if ($entity_selected =='') {
$N = '0';
} else if ($entity_selected == 'Micro') {
$N = '1';
} else if (($entity_selected == 'Small') AND ($country_checked == 'India')) {
$N = '2.2';
} else if (($entity_selected == 'Small') AND ($country_checked !== 'India')) {
$N = '2';
} else if (($entity_selected == 'Large') AND ($country_checked == 'India')) {
$N = '4.4';
} else if (($entity_selected == 'Large') AND ($country_checked == 'Philippines')) {
$N = '5.5';
} else if (($entity_selected == 'Large') AND ($country_checked !== 'Philippines') AND ($country_checked !== 'India')) {
$N = '4';
} else {
$N = '0';
}
$X = $claims_selected;
$Y = $pages_selected;
if ($country_checked == 'USA') {
$result = (430 + 25 * ($X - 20) + 200 * (($Y - 100) / 50 + (1 - ($Y - 100) / 50))) * $N + 0.15 * $Z + 750;
} else {
$result = 'Not able to fetch data.';
}
?>
<tr>
<td rowspan='8'><h2><?php echo $country_checked; ?></h2></td>
</tr>
<tr>
<td> Z</td>
<td><?php echo $Z; ?></td>
</tr>
<tr>
<td> Entity</td>
<td> <?php echo $entity_selected; ?></td>
</tr>
<tr>
<td> N</td>
<td> <?php echo $N; ?></td>
</tr>
<tr>
<td><?php echo $language_selected; ?> to <?php echo $language; ?></td>
<td> </td>
</tr>
<tr>
<td> X</td>
<td> <?php echo $X; ?></td>
</tr>
<tr>
<td> Y</td>
<td> <?php echo $Y; ?></td>
</tr>
<tr>
<td><strong>TOTAL PATENT FEE</strong></td>
<td><b> USD <?php echo number_format((float)$result, 2, '.', ''); ?></b></td>
</tr>
<?php
} // END WHILE LOOP
} //END FOR LOOP
echo '</table>';
}
?>
<?php
if (isset($_GET['pdf'])) {
$html = ob_get_clean();
$dompdf = new DOMPDF();
$dompdf->load_html($html);
$dompdf->setPaper('A4', 'portrait');
$dompdf->render();
$dompdf->stream("the_inquiry.pdf");
}
else {
?>
<div class="shouldPrintToPDF">
<a href="<?php echo $_SERVER['PHP_SELF'] , '?' , http_build_query( $_GET ); ?>&pdf=1" class="pdflink">Open or save as PDF</a>
</div>
</form>
</body>
</html>
<?php } }?>
问题是，即使URL中存在pdf查询字符串，您也将输出HTML内容。生成的PDF将与HTML混合在一起，因此无效。发送PDF时，不应将任何HTML代码发送到浏览器。这是有条件的可能解决方案：
<?php
require_once 'dompdf/autoload.inc.php';
use Dompdf\Dompdf;
if (isset($_GET['pdf'])) {
ob_start();
}
else {
?>
<!DOCTYPE html>
<head>
<title>Country Language</title>
</head>
<body>
<form>
<?php } ?>
<table border="1"><tr><td><b>Countries Selected</b></td><td><b>Details</b></td><td><b>Amount</b></td></tr>
<tr>
<td rowspan='8'><h2>Australia</h2></td>
</tr>
<tr>
<td> Z</td>
<td>3</td>
</tr>
<tr>
<td> Entity</td>
<td> </td>
</tr>
<tr>
<td> N</td>
<td> 0</td>
</tr>
<tr>
<td>English to English</td>
<td> </td>
</tr>
<tr>
<td> X</td>
<td> 1</td>
</tr>
<tr>
<td> Y</td>
<td> 2</td>
</tr>
<tr>
<td><strong>TOTAL PATENT FEE</strong></td>
<td><b> USD 1400.45</b></td>
</tr>
<tr>
<td rowspan='8'><h2>India</h2></td>
</tr>
<tr>
<td> Z</td>
<td>3</td>
</tr>
<tr>
<td> Entity</td>
<td> Micro</td>
</tr>
<tr>
<td> N</td>
<td> 1</td>
</tr>
<tr>
<td>Arabic to English</td>
<td> </td>
</tr>
<tr>
<td> X</td>
<td> 1</td>
</tr>
<tr>
<td> Y</td>
<td> 2</td>
</tr>
<tr>
<td><strong>TOTAL PATENT FEE</strong></td>
<td><b> USD 315.45</b></td>
</tr>
</table>
<?php
if (isset($_GET['pdf'])) {
$html = ob_get_clean();
$dompdf = new DOMPDF();
$dompdf->load_html($html);
$dompdf->setPaper('A4', 'portrait');
$dompdf->render();
$dompdf->stream("the_inquiry.pdf");
}
else {
?>
<div class="shouldPrintToPDF">
<a href="/general/cean/cost-calc5.php?&pdf=1" class="pdflink">Open as PDF</a>
</div>
</form>
</body>
</html>
<?php } ?>
您仅在发出POST请求且数据可用于生成表时才生成表。当您单击PDF链接时，将发出GET请求。您可以通过使用GET（而不是POST）发送和接收数据来解决此问题。 （例如：$ _POST ['language'] => $ _GET ['language']）。另一个解决方案是将PDF链接替换为发送必要数据的表单（可以是带有隐藏输入字段的不可见表单）。您还应该从页面中删除其他<form>和</form>标签（我认为它们是不必要的）。
<?php
function repopulate($field) {
if (isset($_POST[$field])) {
echo htmlspecialchars($_POST[$field]);
}
}
?>
<div class="shouldPrintToPDF">
<form method="post" action="?pdf=1">
<input type="hidden" name="language" value="<?php repopulate('language'); ?>">
<!-- Add all your fields (claims, pages...) here and use the repopulate function -->
<button name="submit" type="submit">Open or save as PDF</button>
</form>
</div>
希望对您有帮助！