CI. Tokenizer functions

Introducere

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.

Necesități

Aceste funcții sunt disponibile ca părți ale modulului standard care este întotdeauna disponibil.

Instalare

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.

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

Constante predefinite

Aceste constante sunt definite de această extensie și vor fi disponibile doar cînd extensia a fost fie compilată odată la instalarea PHP fie dacă extensia este încărcată dinamic la rulare.

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)

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)

Exemple

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.

Exemplu 1. Strip comments with the tokenizer

<?php
  $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
          break;
        default:
          // anything else -> output "as is"
          echo $text;
          break;
      }
    }
  }
?>
Cuprins
token_get_all -- Split given source into PHP tokens
token_name -- Get the symbolic name of a given PHP token