image.examples.html

来自「php的帮助文档,涉及到PHP的案例和基本语法,以及实际应用内容」· HTML 代码 · 共 47 行

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head>  <title>Examples</title>  <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="image.constants.html">Predefined Constants</a></div> <div class="next" style="text-align: right; float: right;"><a href="image.examples-watermark.html">Adding watermarks to images using alpha channels</a></div> <div class="up"><a href="book.image.html">GD</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div> <h1>Examples</h1><h2>Table of Contents</h2><ul class="chunklist chunklist_chapter"><li><a href="image.examples-watermark.html">Adding watermarks to images using alpha channels</a></li><li><a href="image.examples.merged-watermark.html">Using imagecopymerge to create a translucent watermark</a></li></ul> <div id="image.examples-png" class="section">  <p class="para">   <div class="example">    <p><b>Example #1 PNG creation with PHP</b></p>    <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB">&lt;?php<br /><br />header</span><span style="color: #007700">(</span><span style="color: #DD0000">"Content-type:&nbsp;image/png"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$string&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">$_GET</span><span style="color: #007700">[</span><span style="color: #DD0000">'text'</span><span style="color: #007700">];<br /></span><span style="color: #0000BB">$im&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">imagecreatefrompng</span><span style="color: #007700">(</span><span style="color: #DD0000">"images/button1.png"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$orange&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">imagecolorallocate</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">220</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">210</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">60</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$px&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #007700">=&nbsp;(</span><span style="color: #0000BB">imagesx</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">)&nbsp;-&nbsp;</span><span style="color: #0000BB">7.5&nbsp;</span><span style="color: #007700">*&nbsp;</span><span style="color: #0000BB">strlen</span><span style="color: #007700">(</span><span style="color: #0000BB">$string</span><span style="color: #007700">))&nbsp;/&nbsp;</span><span style="color: #0000BB">2</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">imagestring</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">3</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$px</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">9</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$string</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$orange</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">imagepng</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">imagedestroy</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">?&gt;</span></span></code></div>    </div>   </div>   This example would be called from a page with a tag like: &lt;img   src=&quot;button.php?text=text&quot;&gt;. The above button.php script   then takes this &quot;text&quot; string and overlays it on top of a   base image which in this case is &quot;images/button1.png&quot;   and outputs the resulting image. This is a very convenient way to   avoid having to draw new button images every time you want to   change the text of a button. With this method they are   dynamically generated.  </p> </div>  </div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="image.constants.html">Predefined Constants</a></div> <div class="next" style="text-align: right; float: right;"><a href="image.examples-watermark.html">Adding watermarks to images using alpha channels</a></div> <div class="up"><a href="book.image.html">GD</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>

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