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# C. Tokenizer functions

# Introduction

Warning
This extension is EXPERIMENTAL. The behaviour of this extension -- including the names of its functions and anything else documented about this extension -- may change without notice in a future release of PHP. Use this extension at your own risk.

See also the appendix about tokens.

# Runtime Configuration

The behaviour of these functions is affected by settings in `php.ini`.

Table 1. Tokenizer Configuration Options

Name | Default | Changeable
--- | --- | ---
tokenizer.global_value | "42" | PHP_INI_ALL
tokenizer.global_string | "foobar" | PHP_INI_ALL

For further details and definition of the PHP_INI_* constants see ini_set().

# 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_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)

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