【php100译稿】PDF全称Portable Document Format，译为可移植文档格式，是Adobe公司推出的便携文档格式。PDF具有与操作系统无关的特性，这一性能使它成为在Internet上进行电子文档发行和数字化信息传播的理想文档格式。今天我们来讨论如何使用PHP创建PDF文档，以及使用PHP修改PDF。
要想在PHP中使用PDF文档，我们需要用到TCPDF包，一个PHP用来读取PDF的类。
PHP创建PDF文档
你可以从下面给出的链接下载TCPDF包。
TCPDF - PHP class for PDF：http://sourceforge.net/projects/tcpdf/files/
这是一个免费且易用的插件包，下面我们给出一些示例来演示如何使用TCPDF包。
示例一：使用PHP生成一个简单的PDF文档
<ol class="dp-c"><li class="alt"><span><span><?php </SPAN></span><li><span> </span></li> <li class="alt"> <span class="keyword">require_once</span><span>(</span><span class="string">'../config/lang/eng.php'</span><span>); </span> </li> <li> <span class="keyword">require_once</span><span>(</span><span class="string">'../tcpdf.php'</span><span>); </span> </li> <li class="alt"><span> </span></li> <li> <span class="comment">// create new PDF document </span><span> </span> </li> <li class="alt"> <span class="vars">$pdf</span><span> = </span><span class="keyword">new</span><span> TCPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, </span><span class="string">'UTF-8'</span><span>, false); </span> </li> <li><span> </span></li> <li class="alt"> <span class="comment">// set document information </span><span> </span> </li> <li> <span class="vars">$pdf</span><span>->SetCreator(PDF_CREATOR); </span> </li> <li class="alt"> <span class="vars">$pdf</span><span>->SetAuthor(</span><span class="string">'Nicola Asuni'</span><span>); </span> </li> <li> <span class="vars">$pdf</span><span>->SetTitle(</span><span class="string">'TCPDF Example 002'</span><span>); </span> </li> <li class="alt"> <span class="vars">$pdf</span><span>->SetSubject(</span><span class="string">'TCPDF Tutorial'</span><span>); </span> </li> <li> <span class="vars">$pdf</span><span>->SetKeywords(</span><span class="string">'TCPDF, PDF, example, test, guide'</span><span>); </span> </li> <li class="alt"><span> </span></li> <li> <span class="comment">// remove default header/footer </span><span> </span> </li> <li class="alt"> <span class="vars">$pdf</span><span>->setPrintHeader(false); </span> </li> <li> <span class="vars">$pdf</span><span>->setPrintFooter(false); </span> </li> <li class="alt"><span> </span></li> <li> <span class="comment">// set default monospaced font </span><span> </span> </li> <li class="alt"> <span class="vars">$pdf</span><span>->SetDefaultMonospacedFont(PDF_FONT_MONOSPACED); </span> </li> <li><span> </span></li> <li class="alt"> <span class="comment">//set margins </span><span> </span> </li> <li> <span class="vars">$pdf</span><span>->SetMargins(PDF_MARGIN_LEFT, PDF_MARGIN_TOP, PDF_MARGIN_RIGHT); </span> </li> <li class="alt"><span> </span></li> <li> <span class="comment">//set auto page breaks </span><span> </span> </li> <li class="alt"> <span class="vars">$pdf</span><span>->SetAutoPageBreak(TRUE, PDF_MARGIN_BOTTOM); </span> </li> <li><span> </span></li> <li class="alt"> <span class="comment">//set image scale factor </span><span> </span> </li> <li> <span class="vars">$pdf</span><span>->setImageScale(PDF_IMAGE_SCALE_RATIO); </span> </li> <li class="alt"><span> </span></li> <li> <span class="comment">//set some language-dependent strings </span><span> </span> </li> <li class="alt"> <span class="vars">$pdf</span><span>->setLanguageArray(</span><span class="vars">$l</span><span>); </span> </li> <li><span> </span></li> <li class="alt"> <span class="comment">// --------------------------------------------------------- </span><span> </span> </li> <li><span> </span></li> <li class="alt"> <span class="comment">// set font </span><span> </span> </li> <li> <span class="vars">$pdf</span><span>->SetFont(</span><span class="string">'times'</span><span>, </span><span class="string">'BI'</span><span>, 20); </span> </li> <li class="alt"><span> </span></li> <li> <span class="comment">// add a page </span><span> </span> </li> <li class="alt"> <span class="vars">$pdf</span><span>->AddPage(); </span> </li> <li><span> </span></li> <li class="alt"> <span class="comment">// print a line using Cell() </span><span> </span> </li> <li> <span class="vars">$pdf</span><span>->Cell(0, 10, </span><span class="string">'Example 002'</span><span>, 1, 1, </span><span class="string">'C'</span><span>); </span> </li> <li class="alt"><span> </span></li> <li> <span class="comment">// --------------------------------------------------------- </span><span> </span> </li> <li class="alt"><span> </span></li> <li> <span class="comment">//Close and output PDF document </span><span> </span> </li> <li class="alt"> <span class="vars">$pdf</span><span>->Output(</span><span class="string">'example_002.pdf'</span><span>, </span><span class="string">'I'</span><span>); </span> </li> <li><span>?> </span></li></span></li></ol>
使用PHP修改PDF文档
下面我们讨论如何使用PHP修改PDF文档。假设我们需要将一张图片通过PHP程序加入到PDF中，示例代码如下：
示例二：使用PHP在PDF中增加一张图片
<ol class="dp-c"><li class="alt"><span><span><?php </SPAN></span><li> <span class="keyword">require_once</span><span>(</span><span class="string">'../config/lang/eng.php'</span><span>); </span> </li> <li class="alt"> <span class="keyword">require_once</span><span>(</span><span class="string">'../tcpdf.php'</span><span>); </span> </li> <li><span> </span></li> <li class="alt"> <span class="comment">// create new PDF document </span><span> </span> </li> <li> <span class="vars">$pdf</span><span> = </span><span class="keyword">new</span><span> TCPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, </span><span class="string">'UTF-8'</span><span>, false); </span> </li> <li class="alt"><span> </span></li> <li> <span class="comment">// set document information </span><span> </span> </li> <li class="alt"> <span class="vars">$pdf</span><span>->SetCreator(PDF_CREATOR); </span> </li> <li> <span class="vars">$pdf</span><span>->SetAuthor(</span><span class="string">'Nicola Asuni'</span><span>); </span> </li> <li class="alt"> <span class="vars">$pdf</span><span>->SetTitle(</span><span class="string">'TCPDF Example 009'</span><span>); </span> </li> <li> <span class="vars">$pdf</span><span>->SetSubject(</span><span class="string">'TCPDF Tutorial'</span><span>); </span> </li> <li class="alt"> <span class="vars">$pdf</span><span>->SetKeywords(</span><span class="string">'TCPDF, PDF, example, test, guide'</span><span>); </span> </li> <li><span> </span></li> <li class="alt"> <span class="comment">// set default header data </span><span> </span> </li> <li> <span class="vars">$pdf</span><span>->SetHeaderData(PDF_HEADER_LOGO, PDF_HEADER_LOGO_WIDTH, PDF_HEADER_TITLE, PDF_HEADER_STRING); </span> </li> <li class="alt"><span> </span></li> <li> <span class="comment">// set header and footer fonts </span><span> </span> </li> <li class="alt"> <span class="vars">$pdf</span><span>->setHeaderFont(Array(PDF_FONT_NAME_MAIN, </span><span class="string">''</span><span>, PDF_FONT_SIZE_MAIN)); </span> </li> <li> <span class="vars">$pdf</span><span>->setFooterFont(Array(PDF_FONT_NAME_DATA, </span><span class="string">''</span><span>, PDF_FONT_SIZE_DATA)); </span> </li> <li class="alt"><span> </span></li> <li> <span class="comment">// set default monospaced font </span><span> </span> </li> <li class="alt"> <span class="vars">$pdf</span><span>->SetDefaultMonospacedFont(PDF_FONT_MONOSPACED); </span> </li> <li><span> </span></li> <li class="alt"> <span class="comment">//set margins </span><span> </span> </li> <li> <span class="vars">$pdf</span><span>->SetMargins(PDF_MARGIN_LEFT, PDF_MARGIN_TOP, PDF_MARGIN_RIGHT); </span> </li> <li class="alt"> <span class="vars">$pdf</span><span>->SetHeaderMargin(PDF_MARGIN_HEADER); </span> </li> <li> <span class="vars">$pdf</span><span>->SetFooterMargin(PDF_MARGIN_FOOTER); </span> </li> <li class="alt"><span> </span></li> <li> <span class="comment">//set auto page breaks </span><span> </span> </li> <li class="alt"> <span class="vars">$pdf</span><span>->SetAutoPageBreak(TRUE, PDF_MARGIN_BOTTOM); </span> </li> <li><span> </span></li> <li class="alt"> <span class="comment">//set image scale factor </span><span> </span> </li> <li> <span class="vars">$pdf</span><span>->setImageScale(PDF_IMAGE_SCALE_RATIO); </span> </li> <li class="alt"><span> </span></li> <li> <span class="comment">//set some language-dependent strings </span><span> </span> </li> <li class="alt"> <span class="vars">$pdf</span><span>->setLanguageArray(</span><span class="vars">$l</span><span>); </span> </li> <li><span> </span></li> <li class="alt"> <span class="comment">// --------------------------------------------------------- </span><span> </span> </li> <li><span> </span></li> <li class="alt"> <span class="comment">// add a page </span><span> </span> </li> <li> <span class="vars">$pdf</span><span>->AddPage(); </span> </li> <li class="alt"><span> </span></li> <li> <span class="comment">// set JPEG quality </span><span> </span> </li> <li class="alt"> <span class="vars">$pdf</span><span>->setJPEGQuality(75); </span> </li> <li><span> </span></li> <li class="alt"> <span class="comment">// Image example </span><span> </span> </li> <li> <span class="vars">$pdf</span><span>->Image(</span><span class="string">'../images/image_demo.jpg'</span><span>, 50, 50, 100, 150, </span><span class="string">''</span><span>, </span><span class="string">'http://www.tcpdf.org'</span><span>, </span><span class="string">''</span><span>, true, 150); </span> </li> <li class="alt"><span> </span></li> <li> <span class="comment">// --------------------------------------------------------- </span><span> </span> </li> <li class="alt"><span> </span></li> <li> <span class="comment">//Close and output PDF document </span><span> </span> </li> <li class="alt"> <span class="vars">$pdf</span><span>->Output(</span><span class="string">'example_009.pdf'</span><span>, </span><span class="string">'I'</span><span>); </span> </li> <li><span>?> </span></li></span></li></ol>
http://www.tecnick.com/public/code/cp_dpage.php?aiocp_dp=tcpdf_examples
同时，你也可以使用TCPDF的基础属性进行PDF文档的管理。如果你想自己开发一个PHP的PDF文档类，可以参考PHP文档中关于PDF的一些函数介绍：http://www.php.net/manual/en/ref.pdf.php
