Tokenizer Functions
소개
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.
See also the appendix about tokens.
요구 조건
이 확장을 빌드할 때 외부 라이브러리가 필요하지 않습니다.
설치
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.
PHP 윈도우 버전에서는 이 확장에 대한 지원이 포함되어 있습니다. 이 함수들을 이용하기 위해서 추가로 확장을 읽어들일 필요가 없습니다.
Note: Built-in support for tokenizer is available as of PHP 4.3.0.
예약 상수
When the extension has either been compiled into PHP or dynamically loaded at runtime, the tokens listed in 해석기 토큰 목록 are defined as constants.
예제
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;
}
}
}
?>
Table of Contents
- token_get_all — Split given source into PHP tokens
- token_name — Get the symbolic name of a given PHP token