南宁百度网站公司aso优化分析
一.导出pdf文件，首先要安装相关的类库文件，我用的是dompdf类库。
1.安装类库文件：
composer require dompdf/dompdf2.引入类库文件到你的控制器中，创建方法：
public function generatePdf(){//你需要打印的查询内容$data = ['name' => '烦烦烦','content' => '哈哈哈计划经济','img' => 'https:://www.tupian.com/upload/name.png'];// 实例化 Dompdf 对象$options = new Options();// 重点设置字体$options->setDefaultFont('SimSun');$dompdf = new Dompdf($options);// 设置 HTML 内容$html = $this->getPdfContent($list); // 自定义获取数据并生成 HTML 的方法// 加载 HTML 到 Dompdf$dompdf->loadHtml($html);$dompdf->setPaper('A4', 'portrait');// 渲染 PDF$dompdf->render();// 输出 PDF 文件到浏览器$dompdf->stream("/report.pdf", array("Attachment" => true)); // 可以设置为 true 来强制下载return $this->success('ok');}//pdf的html文件private function getPdfContent($data){// 获取数据并生成 HTML 字符串
// $data = YourModel::all(); // 替换为你的数据获取逻辑$html = '<meta charset="UTF-8">';$html = '<html><head><style>table { width: 100%; border-collapse: collapse; } td, th { border: 1px solid black; padding: 8px; text-align: left; }</style></head><body>';$html .= '<h1>记录</h1>';$html .= '<table>';// foreach ($data as $row) {$html .= '<tr><td><b></b></td><td></td></tr>';$html .= "<tr><td>名称</td><td>{$data->name}</td></tr>"; // 根据你的数据结构调整单元格内容$html .= "<tr><td>使用内容</td><td>{$data->content}</td></tr>"; $html .= "<tr><td>图片</td><td><img src='{$data->img}' width='100' height='100'></img></td></tr>";// }$html .= '</table></body></html>';return $html;}二. 这时候你去访问生成pdf文件，若输出数据为中文，则会显示乱码。需要引用字体库文件。
1) 新建load_font.php放到项目跟目录，跟verdor同级：
<?php
// 1. [Required] Point to the composer or dompdf autoloader
require_once "vendor/autoload.php";// 2. [Optional] Set the path to your font directory
// By default dompdf loads fonts to dompdf/lib/fonts
// If you have modified your font directory set this
// variable appropriately.
//$fontDir = "lib/fonts";// *** DO NOT MODIFY BELOW THIS POINT ***use Dompdf\Dompdf;
use Dompdf\CanvasFactory;
use Dompdf\Exception;
use Dompdf\FontMetrics;
use Dompdf\Options;use FontLib\Font;/*** Display command line usage*/
function usage() {echo <<<EOD
Usage: {$_SERVER["argv"][0]} font_family [n_file [b_file] [i_file] [bi_file]]
font_family: the name of the font, e.g. Verdana, 'Times New Roman',monospace, sans-serif. If it equals to "system_fonts", all the system fonts will be installed.
n_file: the .ttf or .otf file for the normal, non-bold, non-italicface of the font.
{b|i|bi}_file: the files for each of the respective (bold, italic,bold-italic) faces.
If the optional b|i|bi files are not specified, load_font.php will search
the directory containing normal font file (n_file) for additional files that
it thinks might be the correct ones (e.g. that end in _Bold or b or B). If
it finds the files they will also be processed. All files will be
automatically copied to the DOMPDF font directory, and afm files will be
generated using php-font-lib (https://github.com/PhenX/php-font-lib).
Examples:
./load_font.php silkscreen /usr/share/fonts/truetype/slkscr.ttf
./load_font.php 'Times New Roman' /mnt/c_drive/WINDOWS/Fonts/times.ttf
EOD;
exit;
}if ( $_SERVER["argc"] < 3 && @$_SERVER["argv"][1] != "system_fonts" ) {usage();
}$dompdf = new Dompdf();
if (isset($fontDir) && realpath($fontDir) !== false) {$dompdf->getOptions()->set('fontDir', $fontDir);
}/*** Installs a new font family* This function maps a font-family name to a font. It tries to locate the* bold, italic, and bold italic versions of the font as well. Once the* files are located, ttf versions of the font are copied to the fonts* directory. Changes to the font lookup table are saved to the cache.** @param Dompdf $dompdf dompdf main object * @param string $fontname the font-family name* @param string $normal the filename of the normal face font subtype* @param string $bold the filename of the bold face font subtype* @param string $italic the filename of the italic face font subtype* @param string $bold_italic the filename of the bold italic face font subtype** @throws Exception*/
function install_font_family($dompdf, $fontname, $normal, $bold = null, $italic = null, $bold_italic = null) {$fontMetrics = $dompdf->getFontMetrics();// Check if the base filename is readableif ( !is_readable($normal) )throw new Exception("Unable to read '$normal'.");$dir = dirname($normal);$basename = basename($normal);$last_dot = strrpos($basename, '.');if ($last_dot !== false) {$file = substr($basename, 0, $last_dot);$ext = strtolower(substr($basename, $last_dot));} else {$file = $basename;$ext = '';}if ( !in_array($ext, array(".ttf", ".otf")) ) {throw new Exception("Unable to process fonts of type '$ext'.");}// Try $file_Bold.$ext etc.$path = "$dir/$file";$patterns = array("bold" => array("_Bold", "b", "B", "bd", "BD"),"italic" => array("_Italic", "i", "I"),"bold_italic" => array("_Bold_Italic", "bi", "BI", "ib", "IB"),);foreach ($patterns as $type => $_patterns) {if ( !isset($$type) || !is_readable($$type) ) {foreach($_patterns as $_pattern) {if ( is_readable("$path$_pattern$ext") ) {$$type = "$path$_pattern$ext";break;}}if ( is_null($$type) )echo ("Unable to find $type face file.\n");}}$fonts = compact("normal", "bold", "italic", "bold_italic");$entry = array();// Copy the files to the font directory.foreach ($fonts as $var => $src) {if ( is_null($src) ) {$entry[$var] = $dompdf->getOptions()->get('fontDir') . '/' . mb_substr(basename($normal), 0, -4);continue;}// Verify that the fonts exist and are readableif ( !is_readable($src) )throw new Exception("Requested font '$src' is not readable");$dest = $dompdf->getOptions()->get('fontDir') . '/' . basename($src);if ( !is_writeable(dirname($dest)) )throw new Exception("Unable to write to destination '$dest'.");echo "Copying $src to $dest...\n";if ( !copy($src, $dest) )throw new Exception("Unable to copy '$src' to '$dest'");$entry_name = mb_substr($dest, 0, -4);echo "Generating Adobe Font Metrics for $entry_name...\n";$font_obj = Font::load($dest);$font_obj->saveAdobeFontMetrics("$entry_name.ufm");$font_obj->close();$entry[$var] = $entry_name;}// Store the fonts in the lookup table$fontMetrics->setFontFamily($fontname, $entry);// Save the changes$fontMetrics->saveFontFamilies();
}// If installing system fonts (may take a long time)
if ( $_SERVER["argv"][1] === "system_fonts" ) {$fontMetrics = $dompdf->getFontMetrics();$files = glob("/usr/share/fonts/truetype/*.ttf") +glob("/usr/share/fonts/truetype/*/*.ttf") +glob("/usr/share/fonts/truetype/*/*/*.ttf") +glob("C:\\Windows\\fonts\\*.ttf") +glob("C:\\WinNT\\fonts\\*.ttf") +glob("/mnt/c_drive/WINDOWS/Fonts/");$fonts = array();foreach ($files as $file) {$font = Font::load($file);$records = $font->getData("name", "records");$type = $fontMetrics->getType($records[2]);$fonts[mb_strtolower($records[1])][$type] = $file;$font->close();}foreach ( $fonts as $family => $files ) {echo " >> Installing '$family'... \n";if ( !isset($files["normal"]) ) {echo "No 'normal' style font file\n";}else {install_font_family($dompdf, $family, @$files["normal"], @$files["bold"], @$files["italic"], @$files["bold_italic"]);echo "Done !\n";}echo "\n";}
}
else {call_user_func_array("install_font_family", array_merge( array($dompdf), array_slice($_SERVER["argv"], 1) ));
}
2）下载simsun.ttf文件放到根目录下：
3）执行命令：
//必须执行，很重要
php load_fount.php "SimSun" SimSun.ttf4）添加设置字体的引用，如图一：
// 重点设置字体$options->setDefaultFont('SimSun');参考文档：php|thinkphp pdf 导出中文乱码 解决办法 #php导出 pdf中文乱码_我自横刀向天笑的技术博客_51CTO博客三.这时候，你想要导出的数据还有图片怎么办
1）将图片转换为base64的格式输出
$image = 'data:image/jpeg;base64,' . base64_encode(file_get_contents($data['img']));参考文档：php生成pdf图片不显示怎么办-PHP问题-PHP中文网