�vod

The tokenizer functions provide an interface to the PHP tokenizer embedded in the Zend Engine. Using these functions you may write your own PHP source analyzing or modification tools without having to deal with the language specification at the lexical level.

Po�adavky

Tyto funkce jsou k dispozici jako sou��st standardn�ho modulu, kter� je v�dy dostupn�.

Instalace

Beginning with PHP 4.3.0 these functions are enabled by default. For older versions you have to configure and compile PHP with --enable-tokenizer. You can disable tokenizer support with --disable-tokenizer.

Verze PHP pro Windows m� vestav�nou podporu pro toto roz��en�. K pou�it� t�chto funkc� nen� t�eba na��tat ��dn� dal�� roz��en�.

Pozn�mka: Builtin support for tokenizer is available with PHP 4.3.0.

P�eddefinovan� konstanty

Tyto konstanty jsou definov�ny t�mto roz��en�m a budou k dispozici pouze tehdy, bylo-li roz��en� zkompilov�no spole�n� s PHP nebo dynamicky zavedeno za b�hu.

T_INCLUDE (integer)
T_INCLUDE_ONCE (integer)
T_EVAL (integer)
T_REQUIRE (integer)
T_REQUIRE_ONCE (integer)
T_LOGICAL_OR (integer)
T_LOGICAL_XOR (integer)
T_LOGICAL_AND (integer)
T_PRINT (integer)
T_PLUS_EQUAL (integer)
T_MINUS_EQUAL (integer)
T_MUL_EQUAL (integer)
T_DIV_EQUAL (integer)
T_CONCAT_EQUAL (integer)
T_MOD_EQUAL (integer)
T_AND_EQUAL (integer)
T_OR_EQUAL (integer)
T_XOR_EQUAL (integer)
T_SL_EQUAL (integer)
T_SR_EQUAL (integer)
T_BOOLEAN_OR (integer)
T_BOOLEAN_AND (integer)
T_IS_EQUAL (integer)
T_IS_NOT_EQUAL (integer)
T_IS_IDENTICAL (integer)
T_IS_NOT_IDENTICAL (integer)
T_IS_SMALLER_OR_EQUAL (integer)
T_IS_GREATER_OR_EQUAL (integer)
T_SL (integer)
T_SR (integer)
T_INC (integer)
T_DEC (integer)
T_INT_CAST (integer)
T_DOUBLE_CAST (integer)
T_STRING_CAST (integer)
T_ARRAY_CAST (integer)
T_OBJECT_CAST (integer)
T_BOOL_CAST (integer)
T_UNSET_CAST (integer)
T_NEW (integer)
T_EXIT (integer)
T_IF (integer)
T_ELSEIF (integer)
T_ELSE (integer)
T_ENDIF (integer)
T_LNUMBER (integer)
T_DNUMBER (integer)
T_STRING (integer)
T_STRING_VARNAME (integer)
T_VARIABLE (integer)
T_NUM_STRING (integer)
T_INLINE_HTML (integer)
T_CHARACTER (integer)
T_BAD_CHARACTER (integer)
T_ENCAPSED_AND_WHITESPACE (integer)
T_CONSTANT_ENCAPSED_STRING (integer)
T_ECHO (integer)
T_DO (integer)
T_WHILE (integer)
T_ENDWHILE (integer)
T_FOR (integer)
T_ENDFOR (integer)
T_FOREACH (integer)
T_ENDFOREACH (integer)
T_DECLARE (integer)
T_ENDDECLARE (integer)
T_AS (integer)
T_SWITCH (integer)
T_ENDSWITCH (integer)
T_CASE (integer)
T_DEFAULT (integer)
T_BREAK (integer)
T_CONTINUE (integer)
T_OLD_FUNCTION (integer)
T_FUNCTION (integer)
T_CONST (integer)
T_RETURN (integer)
T_USE (integer)
T_GLOBAL (integer)
T_STATIC (integer)
T_VAR (integer)
T_UNSET (integer)
T_ISSET (integer)
T_EMPTY (integer)
T_CLASS (integer)
T_EXTENDS (integer)
T_OBJECT_OPERATOR (integer)
T_DOUBLE_ARROW (integer)
T_LIST (integer)
T_ARRAY (integer)
T_LINE (integer)
T_FILE (integer)
T_COMMENT (integer)
T_ML_COMMENT (integer): Pozn�mka: T_ML_COMMENT is not defined in PHP 5. All comments in PHP 5 are of token T_COMMENT.
T_DOC_COMMENT (integer): Pozn�mka: T_DOC_COMMENT was introduced in PHP 5.
T_OPEN_TAG (integer)
T_OPEN_TAG_WITH_ECHO (integer)
T_CLOSE_TAG (integer)
T_WHITESPACE (integer)
T_START_HEREDOC (integer)
T_END_HEREDOC (integer)
T_DOLLAR_OPEN_CURLY_BRACES (integer)
T_CURLY_OPEN (integer)
T_PAAMAYIM_NEKUDOTAYIM (integer)
T_DOUBLE_COLON (integer)

P��klady

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��klad 1. Strip comments with the tokenizer


<?php

  $source = file_get_contents("somefile.php");

  $tokens = token_get_all($source);

  /* 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);

  }

  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;

      }

    }

  }

?>


	downloads \| documentation \| faq \| getting help \| mailing lists \| \| php.net sites \| links \| my php.net

search for in the

CXIII. Tokenizer Functions

�vod

Po�adavky

Instalace

P�eddefinovan� konstanty

P��klady