记`tecnickcom/TCPDF`暗坑

TCPDF is a comprehensive PHP library for generating PDF documents without requiring external extensions. This page provides a high-level overview of the library's architecture, purpose, and main components. For detailed information about specific components, please refer to their respective documentation pages.

详情可查看

1. ImageSVG处理内存不足

所在文件：vendor/tecnickcom/tcpdf/tcpdf.php

PHP >= 8.4

// creates a new XML parser to be used by the other XML functions
$parser = xml_parser_create('UTF-8');
//在这之后加上
xml_parser_set_option( $parser, XML_OPTION_PARSE_HUGE, true);

PHP < 8.4

将

if (!xml_parse($parser, $svgdata)) {
  $error_message = sprintf('SVG Error: %s at line %d', xml_error_string(xml_get_error_code($parser)), xml_get_current_line_number($parser));
  $this->Error($error_message);
}

修改成：

$chunkSize = 256;
for($pointer = 0; $pointer < strlen($svgdata) && empty($parseErrors); $pointer += $chunkSize) {
     $xmlString = substr($svgdata, $pointer, $chunkSize);
     if(!xml_parse($parser, $xmlString, false)) {
          $error_message = sprintf('SVG Error: %s at line %d', xml_error_string(xml_get_error_code($parser)), xml_get_current_line_number($parser));
          $this->Error($error_message);
     };
}

2. 最终生成的PDF有隐藏水印

所在文件：vendor/tecnickcom/tcpdf/tcpdf.php

protected $tcpdflink = false;

$this->tcpdflink = false;