用于转换PDF，TXT，HTML和图片的实用PHP代码片段
jopen
10年前
以下是一些用于转换PDF，TXT，HTML和图片的实用PHP代码片段。
将PDF转成JPG格式的图片 - PDF2JPG
需要先安装 Image Magic 扩展。简单和非常实用的代码片段用于将PDF文件转成JPG格式的图片。
/** * PDF2JPG script * with ImageMagick */ $pdf_file = './pdf/_folder/example.pdf'; $save_to = './image_folder/example.jpg'; //make sure that apache has permissions to write in this folder! (common problem) //execute ImageMagick command 'convert' and convert PDF to JPG with applied settings exec('convert "'.$pdf_file.'" -colorspace RGB -resize 800 "'.$save_to.'"', $output, $return_var); if($return_var == 0) { //if exec successfuly converted pdf to jpg print "Conversion OK"; } else print "Conversion failed.<br />".$output; html2ps - 将 HTML 转成 pdf
这绝对是非常有用的片段，将HTML转换为PDF文件。我曾在几个项目中使用它。
/******************************************************************************* * */ function convert_to_pdf($url, $path_to_pdf) { require_once(dirname(__FILE__).'/html2ps/config.inc.php'); require_once(HTML2PS_DIR.'pipeline.factory.class.php'); echo WRITER_TEMPDIR; //error_reporting(E_ALL); //ini_set("display_errors","1"); @set_time_limit(10000); parse_config_file(HTML2PS_DIR.'html2ps.config'); /** * Handles the saving of generated PDF to user-defined output file on server */ class MyDestinationFile extends Destination { /** * @var String result file name / path * @access private */ var $_dest_filename; function MyDestinationFile($dest_filename) { $this->_dest_filename = $dest_filename; } function process($tmp_filename, $content_type) { copy($tmp_filename, $this->_dest_filename); } } $media = Media::predefined("A4"); $media->set_landscape(false); $media->set_margins(array('left' => 5, 'right' => 5, 'top' => 10, 'bottom' => 10)); $media->set_pixels(800); $pipeline = PipelineFactory::create_default_pipeline("", // Auto-detect encoding ""); // Override HTML source $pipeline->fetchers[] = new FetcherURL; $pipeline->data_filters[] = new DataFilterHTML2XHTML; $pipeline->parser = new ParserXHTML; $pipeline->layout_engine = new LayoutEngineDefault; $pipeline->output_driver = new OutputDriverFPDF($media); //$filter = new PreTreeFilterHeaderFooter("HEADER", "FOOTER"); //$pipeline->pre_tree_filters[] = $filter; // Override destination to local file $pipeline->destination = new MyDestinationFile($path_to_pdf); global $g_config; $g_config = array( 'cssmedia' => 'screen', 'scalepoints' => '1', 'renderimages' => true, 'renderlinks' => true, 'renderfields' => true, 'renderforms' => false, 'mode' => 'html', 'encoding' => '', 'debugbox' => false, 'pdfversion' => '1.4', 'draw_page_border' => false ); $pipeline->configure($g_config); //$pipeline->add_feature('toc', array('location' => 'before')); $pipeline->process($url, $media); }
将HTML转换为文本
如果您正在构建模拟器的搜索引擎，基于文本的浏览器，我觉得这可能来得心应手了。
<?php // strip javascript, styles, html tags, normalize entities and spaces // based on http://www.php.net/manual/en/function.strip-tags.php#68757 function html2text($html){ $text = $html; static $search = array( '@<script.+?</script>@usi', // Strip out javascript content '@<style.+?</style>@usi', // Strip style content '@<!--.+?-->@us', // Strip multi-line comments including CDATA '@</?[a-z].*?\>@usi', // Strip out HTML tags ); $text = preg_replace($search, ' ', $text); // normalize common entities $text = normalizeEntities($text); // decode other entities $text = html_entity_decode($text, ENT_QUOTES, 'utf-8'); // normalize possibly repeated newlines, tabs, spaces to spaces $text = preg_replace('/\s+/u', ' ', $text); $text = trim($text); // we must still run htmlentities on anything that comes out! // for instance: // <<a>script>alert('XSS')//<<a>/script> // will become // <script>alert('XSS')//</script> return $text; } // replace encoded and double encoded entities to equivalent unicode character // also see /app/bookmarkletPopup.js function normalizeEntities($text) { static $find = array(); static $repl = array(); if (!count($find)) { // build $find and $replace from map one time $map = array( array('\'', 'apos', 39, 'x27'), // Apostrophe array('\'', ''', 'lsquo', 8216, 'x2018'), // Open single quote array('\'', ''', 'rsquo', 8217, 'x2019'), // Close single quote array('"', '"', 'ldquo', 8220, 'x201C'), // Open double quotes array('"', '"', 'rdquo', 8221, 'x201D'), // Close double quotes array('\'', ',', 'sbquo', 8218, 'x201A'), // Single low-9 quote array('"', ',,', 'bdquo', 8222, 'x201E'), // Double low-9 quote array('\'', '´', 'prime', 8242, 'x2032'), // Prime/minutes/feet array('"', '´´', 'Prime', 8243, 'x2033'), // Double prime/seconds/inches array(' ', 'nbsp', 160, 'xA0'), // Non-breaking space array('-', '-', 8208, 'x2010'), // Hyphen array('-', '-', 'ndash', 8211, 150, 'x2013'), // En dash array('--', '--', 'mdash', 8212, 151, 'x2014'), // Em dash array(' ', ' ', 'ensp', 8194, 'x2002'), // En space array(' ', ' ', 'emsp', 8195, 'x2003'), // Em space array(' ', ' ', 'thinsp', 8201, 'x2009'), // Thin space array('*', 'o', 'bull', 8226, 'x2022'), // Bullet array('*', '?', 8227, 'x2023'), // Triangular bullet array('...', '...', 'hellip', 8230, 'x2026'), // Horizontal ellipsis array('°', 'deg', 176, 'xB0'), // Degree array('EUR', 'euro', 8364, 'x20AC'), // Euro array('¥', 'yen', 165, 'xA5'), // Yen array('£', 'pound', 163, 'xA3'), // British Pound array('©', 'copy', 169, 'xA9'), // Copyright Sign array('®', 'reg', 174, 'xAE'), // Registered Sign array('(TM)', 'trade', 8482, 'x2122') // TM Sign ); foreach ($map as $e) { for ($i = 1; $i < count($e); ++$i) { $code = $e[$i]; if (is_int($code)) { // numeric entity $regex = "/&(amp;)?#0*$code;/"; } elseif (preg_match('/^.$/u', $code)/* one unicode char*/) { // single character $regex = "/$code/u"; } elseif (preg_match('/^x([0-9A-F]{2}){1,2}$/i', $code)) { // hex entity $regex = "/&(amp;)?#x0*" . substr($code, 1) . ";/i"; } else { // named entity $regex = "/&(amp;)?$code;/"; } $find[] = $regex; $repl[] = $e[0]; } } } // end first time build return preg_replace($find, $repl, $text); }
Convert a PDF to text with Perl
This is the only exception in our list all other snippets are based on PHP, but this short script is written in Perl and simply converts the PDF 'demo.pdf' to plain text.
#!/perl/bin/perl -w use CAM::PDF; use CAM::PDF::PageText; $filename = "demo.pdf"; my $pdf = CAM::PDF->new($filename); my $pageone_tree = $pdf->getPageContentTree(4); print CAM::PDF::PageText->render($pageone_tree); #Note: I had to install CAM::PDF::PageText by hand, it was not installed by CPAN when I installed CAM::PDF.
I hope you will find the above snippets useful. I wanted to include DOC to PDF converter too, though PHP isn't much of help in this case, however, I found few links that might be useful that can convert different file formats.
Converting documents (ODT, DOC to PDF) on PHP with Unoconv
I found this accidentally, though you need Unoconv installed. Python tool that utilizes LibreOffice libs (pyuno).
Here is the link to guide installation and usage:
http://tech.rgou.net/en/php/converting-documents-odt-doc-to-pdf-on-php-with-unoconv-libreoffice/
Using LiveDocx with PHP 4 and PHP 5 NuSOAP
And another use of LiveDocx without need of Zend Framework, but but does require the SOAP library NuSOAP.
Here is link to guide: http://www.phplivedocx.org/articles/using-livedocx-with-nusoap/