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Predefined Constants	Tokenizer Functions

	Last updated: Thu, 26 Jun 2008

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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Predefined Constants	Tokenizer Functions

	Last updated: Thu, 26 Jun 2008

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