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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="tokenizer.constants.html">Predefined Constants</a></div> <div class="next" style="text-align: right; float: right;"><a href="ref.tokenizer.html">Tokenizer Functions</a></div> <div class="up"><a href="book.tokenizer.html">Tokenizer</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div> <h1>Examples</h1> <p class="para"> Here is a simple example PHP scripts using the tokenizer that will read in a PHP file, strip all comments from the source and print the pure code only. </p> <div class="example"> <p><b>Example #1 Strip comments with the tokenizer</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">/*<br />* T_ML_COMMENT does not exist in PHP 5.<br />* The following three lines define it in order to<br />* preserve backwards compatibility.<br />*<br />* The next two lines define the PHP 5 only T_DOC_COMMENT,<br />* which we will mask as T_ML_COMMENT for PHP 4.<br />*/<br /></span><span style="color: #007700">if (!</span><span style="color: #0000BB">defined</span><span style="color: #007700">(</span><span style="color: #DD0000">'T_ML_COMMENT'</span><span style="color: #007700">)) {<br /> </span><span style="color: #0000BB">define</span><span style="color: #007700">(</span><span style="color: #DD0000">'T_ML_COMMENT'</span><span style="color: #007700">, </span><span style="color: #0000BB">T_COMMENT</span><span style="color: #007700">);<br />} else {<br /> </span><span style="color: #0000BB">define</span><span style="color: #007700">(</span><span style="color: #DD0000">'T_DOC_COMMENT'</span><span style="color: #007700">, </span><span style="color: #0000BB">T_ML_COMMENT</span><span style="color: #007700">);<br />}<br /><br /></span><span style="color: #0000BB">$source </span><span style="color: #007700">= </span><span style="color: #0000BB">file_get_contents</span><span style="color: #007700">(</span><span style="color: #DD0000">'example.php'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$tokens </span><span style="color: #007700">= </span><span style="color: #0000BB">token_get_all</span><span style="color: #007700">(</span><span style="color: #0000BB">$source</span><span style="color: #007700">);<br /><br />foreach (</span><span style="color: #0000BB">$tokens </span><span style="color: #007700">as </span><span style="color: #0000BB">$token</span><span style="color: #007700">) {<br /> if (</span><span style="color: #0000BB">is_string</span><span style="color: #007700">(</span><span style="color: #0000BB">$token</span><span style="color: #007700">)) {<br /> </span><span style="color: #FF8000">// simple 1-character token<br /> </span><span style="color: #007700">echo </span><span style="color: #0000BB">$token</span><span style="color: #007700">;<br /> } else {<br /> </span><span style="color: #FF8000">// token array<br /> </span><span style="color: #007700">list(</span><span style="color: #0000BB">$id</span><span style="color: #007700">, </span><span style="color: #0000BB">$text</span><span style="color: #007700">) = </span><span style="color: #0000BB">$token</span><span style="color: #007700">;<br /><br /> switch (</span><span style="color: #0000BB">$id</span><span style="color: #007700">) { <br /> case </span><span style="color: #0000BB">T_COMMENT</span><span style="color: #007700">: <br /> case </span><span style="color: #0000BB">T_ML_COMMENT</span><span style="color: #007700">: </span><span style="color: #FF8000">// we've defined this<br /> </span><span style="color: #007700">case </span><span style="color: #0000BB">T_DOC_COMMENT</span><span style="color: #007700">: </span><span style="color: #FF8000">// and this<br /> // no action on comments<br /> </span><span style="color: #007700">break;<br /><br /> default:<br /> </span><span style="color: #FF8000">// anything else -> output "as is"<br /> </span><span style="color: #007700">echo </span><span style="color: #0000BB">$text</span><span style="color: #007700">;<br /> break;<br /> }<br /> }<br />}<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> </div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="tokenizer.constants.html">Predefined Constants</a></div> <div class="next" style="text-align: right; float: right;"><a href="ref.tokenizer.html">Tokenizer Functions</a></div> <div class="up"><a href="book.tokenizer.html">Tokenizer</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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