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Last updated: Thu, 21 Aug 2003

CIII. Tokenizer functions


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 analyzation or modification tools without having to deal with the language specification at the lexical level.

See also the appendix about tokens.


No external libraries are needed to build this extension.


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.

The windows version of PHP has built in support for this extension. You do not need to load any additional extension in order to use these functions.

Note: Builtin support for tokenizer is available with PHP 4.3.0.

Predefined Constants

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.

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_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_VARIABLE (integer)

T_NUM_STRING (integer)

T_INLINE_HTML (integer)

T_CHARACTER (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_DOUBLE_ARROW (integer)

T_LIST (integer)

T_ARRAY (integer)

T_LINE (integer)

T_FILE (integer)

T_COMMENT (integer)

T_ML_COMMENT (integer)

T_OPEN_TAG (integer)


T_CLOSE_TAG (integer)

T_WHITESPACE (integer)


T_END_HEREDOC (integer)


T_CURLY_OPEN (integer)


T_DOUBLE_COLON (integer)


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

  $source = file_get_contents("somefile.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:
          // no action on comments
          // anything else -> output "as is"
          echo $text;
Table of Contents
token_get_all -- Split given source into PHP tokens
token_name -- Get the symbolic name of a given PHP token

add a note add a note User Contributed Notes
Tokenizer functions
samueldaza at japan dot co dot jp
17-Jul-2003 11:49
El poder de los Tokens!!!
With this fuction, you can show the source code from a php file without show_source. And the function indenta the code , paint with colors and add animate gifs.. Show the PHP beauty and lightning
example and source

 Last updated: Thu, 21 Aug 2003
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