PHP. Руководство по PHP. 2005

Tokenizer Functions

CXXXVIII. Tokenizer Functions

Введение

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.

Требования

Эти функции всегда доступны.

Установка

Beginning with PHP4.3.0 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.

Версия PHP для

Windows имеет встроенную поддержку данного расширения. Это означает, что

для использования данных функций не требуется загрузка никаких

дополнительных расширений.

Замечание: Builtin support for tokenizer is available with PHP4.3.0.

Предопределенные константы

-Перечисленные ниже константы определены данным расширением и могут быть

доступны только в том случае, если PHP был собран с

поддержкой этого расширения или же в том случае, если

данное расширение подгружается во время выполнения.

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_OLD_FUNCTION is not defined in PHP5.

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)

T_ML_COMMENT is not defined in PHP5. All comments in PHP5 are of token T_COMMENT.

T_DOC_COMMENT (integer)

T_DOC_COMMENT was introduced in PHP5.

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)

T_INTERFACE (integer)

PHP5 only.

T_IMPLEMENTS (integer)

PHP5 only.

T_CLASS_C (integer)

PHP5 only.

T_FUNC_C (integer)

PHP5 only.

T_METHOD_C (integer)

PHP5 only.

T_ABSTRACT (integer)

PHP5 only.

T_CATCH (integer)

PHP5 only.

T_FINAL (integer)

PHP5 only.

T_INSTANCEOF (integer)

PHP5 only.

T_PRIVATE (integer)

PHP5 only.

T_PROTECTED (integer)

PHP5 only.

T_PUBLIC (integer)

PHP5 only.

T_THROW (integer)

PHP5 only.

T_TRY (integer)

PHP5 only.

T_CLONE (integer)

PHP5 only.

Примеры

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.

Пример 1. Strip comments with the tokenizer


<?
/*
* T_ML_COMMENT does not exist in PHP5.
* The following three lines define it in order to
* preserve backwards compatibility.
*
* The next two lines define the PHP5 only T_DOC_COMMENT,
* which we will mask as T_ML_COMMENT for PHP4.
*/
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;
}}
}

?>

Содержание

token_get_all -- Split given source into PHP tokens

token_name -- Get the symbolic name of a given PHP token

tidyNode->isText

token_get_all

Отвечу на любые вопросы. С уважением, Дмитрий Владимирович.

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