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<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" id="example-4076">
<p><strong>Example #1 Strip comments with the tokenizer</strong></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>
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