How to solve garbled characters when opening php pdf (three methods)

With the rapid development of Internet technology, more and more people are beginning to use PHP to develop websites. PHP PDF is one of the more important functions in website development. However, in the process of using PHP PDF, it is often found that opening PDF files appear garbled, which causes great trouble to developers. This article introduces some methods to solve the problem of garbled characters when opening PHP PDF to help developers use PHP PDF more smoothly during the development process.

Method 1: Modify the text encoding

First, we can try to modify the text encoding to solve the problem of garbled characters when opening PHP PDF. In PHP, we can use the iconv() function to convert the text encoding to UTF-8 encoding to ensure that the PDF document can be displayed correctly.

For example, when we use the FPDF class to generate PDF files, we can convert the text encoding to UTF-8 encoding through the following statement:

$text = iconv('gbk', 'utf-8', $text);

Where, 'gbk' represents the original text encoding, 'utf-8' represents the target text encoding. In this way, we can ensure that the PDF document can be displayed correctly without garbled characters.

Method 2: Solve it through font files

Secondly, we can try to use font files to solve the problem of garbled characters when opening PHP PDF. In PHP, we can ensure that PDF documents can use Chinese fonts correctly by specifying the font file path.

For example, when we use the TCPDF class to generate a PDF document, we can specify the font file path through the following statement:

$pdf->setFont("cid0jp", "", 10);

Among them, "cid0jp" is the font name and 10 is the font size. By specifying the font file path, we can make the PDF document use Chinese fonts correctly and ensure that the text is displayed normally.

Method 3: Set the Meta information of the PDF file

Finally, we can try to solve the problem of garbled characters in PHP PDF opening by setting the Meta information of the PDF file. In PHP, we can set the Meta information of the PDF file through the FPDF class to ensure that the document can be displayed correctly.

For example, when we use the FPDF class to generate a PDF document, we can set the Meta information through the following statement:

$pdf->SetTitle("测试标题");
$pdf->SetAuthor("作者名");
$pdf->SetCreator("创建者名");
$pdf->SetSubject("文档主题");
$pdf->SetKeywords("关键字");

By setting the Meta information, we can make the PDF document display text content correctly, Make sure the document can be viewed normally.

Summary

The above are three methods to solve the problem of garbled characters in PHP PDF opening. Developers can make flexible choices during actual development to ensure that PDF documents can be displayed normally. When using PHP PDF, developers should also pay attention to adjusting text encoding, using font files, and setting Meta information to ensure the readability of the document.

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