我正在使用 MPDF 与 Wordpress 和 ACF 来创建凭证。我想单击自定义帖子类型上的按钮来生成 pdf（这有效）。然后，我想将变量拉入 PDF，以使用自定义帖子类型和高级自定义字段中的动态内容填充它，它不会显示错误，值只是空白。这是我到目前为止的代码：
帖子上的按钮：
<a href="<?php get_bloginfo('url'); ?>?offer=<?php echo $post->ID ?>" download>Download The Voucher</a>
用于生成 pdf 的 Functions.php 代码：
add_action('init', 'congres_redirect');
function congres_redirect() {
if(isset($_GET['offer'])) {
$restName = get_field('restaurant_name', $post->ID);
$image = get_field('restaurant_image', $post->ID);
view_conferinta();
}
}
function view_conferinta() {
$output = '<html>
<head><title>Voucher Download</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /></head>
<link rel="stylesheet" type="text/css" href="//fonts.googleapis.com/css?family=Open+Sans" />
<style>
.voucher-content {
padding: 20px;
}
.inner-voucher {
padding: 20px;
border: solid 1px #000;
}
</style>
<body>';
$output .= '
<div class="voucher-content" style="font-family:chelvetica">
<div class="inner-voucher">
<img src=".$image." alt="Logo" style=" margin: 0;" />
<h1>Voucher Title</h1>
<p>Voucher Description</p>
<p>Voucher Code: EL-200DEG07022020-123AB</p>
<p>Restaurant Name:'.$restName.'</p>
<p>This is my static voucher template</p>
<p>POST ID:'.$post->ID.'</p>
</div>
</div>
';
$output .= '
</body>
</html>';
require_once __DIR__ . '/mpdf/vendor/autoload.php';
$mpdf = new \Mpdf\Mpdf(['debug' => true]);
$mpdf->WriteHTML($output);
$mpdf->Output('my-voucher.pdf','I');
//$mpdf->Output($pdfheader.'.pdf', 'D');
exit;
}
这会生成一个 pdf，但所有动态内容都是空白的。我做错了什么？
您没有将动态变量传递到创建输出的函数中。您还需要声明 $post 全局
改变
function view_conferinta() {
$output = '<html>
到
function view_conferinta(restName, $image) {
global $post;
$output = '<html>
然后将全局 post 添加到您的 init 函数中：
function congres_redirect() {
if(isset($_GET['offer'])) {
global $post; //ADD THIS
$restName = get_field('restaurant_name', $post->ID);
$image = get_field('restaurant_image', $post->ID);
view_conferinta();
}
}
jQuery.ajax({
url: site_params.ajaxurl,
type: "POST",
data: total_box_data,
dataType: 'json',
success: function (response) {
if (response.status == 'failure') {
// show message as per design
alert(response.error_message);
// jQuery('.digicore_form_registration-result').html('<div class="alert alert-danger">' + response.error_message + '</div>');
// jQuery('#signup').val('Register');
} else if (response.status == 'success') {
var myBase64 = response.filenamepdf;
var blob;
blob = converBase64toBlob(myBase64, 'application/pdf');
var blobURL = URL.createObjectURL(blob);
if (!window.ActiveXObject) {
var save = document.createElement('a');
save.href = blobURL;
save.download = 'test.pdf' || 'unknown';
save.style = 'display:none;opacity:0;color:transparent;';
(document.body || document.documentElement).appendChild(save);
if (typeof save.click === 'function') {
save.click();
} else {
save.target = '_blank';
var event = document.createEvent('Event');
event.initEvent('click', true, true);
save.dispatchEvent(event);
}
(window.URL || window.webkitURL).revokeObjectURL(save.href);
} else if (!!window.ActiveXObject && document.execCommand) { // for IE
var _window = window.open(blobURL, '_blank');
_window.document.close();
_window.document.execCommand('SaveAs', true, 'test.pdf' || blobURL)
_window.close();
}
// jQuery('.digicore_form_registration-result').html('<div class="alert alert-success alert-dismissible">' + response.success_msg + '</div>');
// jQuery('#signup').val('Register');
} else {
// show error or success message as per design not in alert
alert('pdf is not generate');
}
}
});
var byteCharacters = atob(b64Data);
var byteArrays = [];
for (var offset = 0; offset < byteCharacters.length; offset += sliceSize) {
var slice = byteCharacters.slice(offset, offset + sliceSize);
var byteNumbers = new Array(slice.length);
for (var i = 0; i < slice.length; i++) {
byteNumbers[i] = slice.charCodeAt(i);
}
var byteArray = new Uint8Array(byteNumbers);
byteArrays.push(byteArray);
}
var blob = new Blob(byteArrays, {type: contentType});
return blob;
}
var contentType = 'image/png';
var b64Data = 'iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==';
var blob = b64toBlob(b64Data, contentType);
var blobUrl = URL.createObjectURL(blob);
var img = document.createElement('img');
img.src = blobUrl;
document.body.appendChild(img);
<!-- end snippet -->
<?php
$mpdf = new mPDF();
//echo $html;
$mpdf->WriteHTML($html);
$mpdf->useOnlyCoreFonts = true;
$mpdf->SetDisplayMode('fullpage');
//$mpdf->Output($file_name_url, 'I');
$resultArr['status'] = 'success';
$resultArr['success_msg'] = __('PDF Generated.');
$resultArr['filepath'] = $newurl;
$resultArr['filenamepdf'] = base64_encode($mpdf->Output('test.pdf', 'S'));