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Examples

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.

Example #1 Strip comments with the tokenizer

<?php
/*
* T_ML_COMMENT does not exist in PHP 5.
* The following three lines define it in order to
* preserve backwards compatibility.
*
* The next two lines define the PHP 5 only T_DOC_COMMENT,
* which we will mask as T_ML_COMMENT for PHP 4.
*/
if (!defined('T_ML_COMMENT')) {
   
define('T_ML_COMMENT'T_COMMENT);
} else {
   
define('T_DOC_COMMENT'T_ML_COMMENT);
}

$source file_get_contents('example.php');
$tokens token_get_all($source);

foreach (
$tokens as $token) {
   if (
is_string($token)) {
       
// simple 1-character token
       
echo $token;
   } else {
       
// token array
       
list($id$text) = $token;

       switch (
$id) { 
           case 
T_COMMENT
           case 
T_ML_COMMENT// we've defined this
           
case T_DOC_COMMENT// and this
               // no action on comments
               
break;

           default:
               
// anything else -> output "as is"
               
echo $text;
               break;
       }
   }
}
?>


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