我想显示特定WordPress页面的PDF，该页面按（月份）名称过滤。e、 g：检查当前月份（十月）并显示十月。pdf。所有PDF文档都将从管理面板上载，我想在前端的页面中动态显示当前月份的PDF。

以下是我尝试的代码：

<?php

//Get the full textual representation of current month in lower case
$months = strtolower (date(\'F\'));


//Convert the current month name to PDF file location
$filename = \'/wp-content/uploads/2020/10/\'. $months.\'.pdf\';


if (file_exists($filename)) {
    // Header content type 
    header("Content-type: application/pdf");
    header("Content-Length: " . filesize($filename));

    // Send the file to the browser. 
    readfile($filename);


} else {
    // echo \'False \';
    // die;
}

?>