PHP 中的 tcpdf wordpress 错误，即使我按照 tcpdf 示例 1by1

Question

我创建了一个插件，当您按下发送时，表单中的数据应该被翻译成 pdf 并保存在一个文件夹中以备备份。

我正在使用 tcpdf api，下载了库并将其放在我的插件文件夹中。当我尝试使用来自 tcpdf 站点的 givin textexample 对其进行测试时，它只是抛出了这些错误：

"Warning: "continue" targeting switch is equivalent to "break". Did you mean to use "continue 2"? in /www/htdocs/w00e68de/msp.rfid-dresden.de/wp-content/plugins/wp-markenbuero/tcpdf/tcpdf.php on line 17778

Warning: fopen(): remote host file access not supported, file://example_002.pdf in /www/htdocs/w00e68de/msp.rfid-dresden.de/wp-content/plugins/wp-markenbuero/tcpdf/include/tcpdf_static.php on line 1854

Warning: fopen(file://example_002.pdf): failed to open stream: no suitable wrapper could be found in /www/htdocs/w00e68de/msp.rfid-dresden.de/wp-content/plugins/wp-markenbuero/tcpdf/include/tcpdf_static.php on line 1854 TCPDF ERROR: Unable to create output file: example_002.pdf"

// Include the main TCPDF library (search for installation path).
require_once('tcpdf/tcpdf.php');

// create new PDF document
$pdf = new TCPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', false);

// set document information
$pdf->SetCreator(PDF_CREATOR);
$pdf->SetAuthor('Nicola Asuni');
$pdf->SetTitle('TCPDF Example 002');
$pdf->SetSubject('TCPDF Tutorial');
$pdf->SetKeywords('TCPDF, PDF, example, test, guide');
// remove default header/footer
$pdf->setPrintHeader(false);
$pdf->setPrintFooter(false);
// set default monospaced font
$pdf->SetDefaultMonospacedFont(PDF_FONT_MONOSPACED);
// set margins
$pdf->SetMargins(PDF_MARGIN_LEFT, PDF_MARGIN_TOP, PDF_MARGIN_RIGHT);
// set auto page breaks
$pdf->SetAutoPageBreak(TRUE, PDF_MARGIN_BOTTOM);
// set image scale factor
$pdf->setImageScale(PDF_IMAGE_SCALE_RATIO);
// set some language-dependent strings (optional)
if (@file_exists(dirname(__FILE__).'/lang/eng.php')) {
require_once(dirname(__FILE__).'/lang/eng.php');
$pdf->setLanguageArray($l);
}
// ---------------------------------------------------------
// set font
$pdf->SetFont('times', 'BI', 20);
// add a page
$pdf->AddPage();
// set some text to print
$txt = <<<EOD
TCPDF Example 002
Default page header and footer are disabled using setPrintHeader() and setPrintFooter() methods.
EOD;
// print a block of text using Write()
$pdf->Write(0, $txt, '', 0, 'C', true, 0, false, false, 0);
// ---------------------------------------------------------
//Close and output PDF document
$pdf->Output('example_002.pdf', 'F');
}
?>

Answer 1

这有两个部分，所以我将在两个部分之间进行回答：

文件协议警告/无法生成 PDF：

在F模式下调用Output保存到本地文件时不能使用相对文件路径。您必须提供完整的文件路径。以下是一些示例：

//Generates output file in the same folder as current script.
$pdf->Output(dirname(__FILE__).'/example_002.pdf', 'F');

或

//Save to the document root.
$pdf->Output($_SERVER['DOCUMENT_ROOT'].'/example_002.pdf', 'F');

继续目标切换警告：

此警告是 PHP 7.3 incompatibility warning with whichever version of the TCPDF library you are using. The master branch from the github repo 似乎不会引发此警告，因此请尝试使用该版本的库。

PHP 中的 tcpdf wordpress 错误，即使我按照 tcpdf 示例 1by1

tcpdf wordpress error in PHP even tho i followed the tcpdf example 1by1

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