Tablas de comparación de tipos PHP
T_ENCAPSED_AND_WHITESPACED is returned when parsing strings with evaluated content, like "some $value" or this example from the Strings reference page:
<?php
echo <<<EOT
My name is "$name". I am printing some $foo->foo.
Now, I am printing some {$foo->bar[1]}.
This should print a capital 'A': \x41
EOT;
?>
This last example is tokenized as:
T_ECHO
echo
T_WHITESPACE
%20 (a space character)
T_START_HEREDOC
<<
T_ENCAPSED_AND_WHITESPACE
My name is "
T_VARIABLE
$name
T_ENCAPSED_AND_WHITESPACE
". I am printing some
T_VARIABLE
$foo
T_OBJECT_OPERATOR
->
T_STRING
foo
T_ENCAPSED_AND_WHITESPACE
. Now, I am printing some
T_CURLY_OPEN
{
T_VARIABLE
$foo
T_OBJECT_OPERATOR
->
T_STRING
bar
(terminal)
[
T_LNUMBER
1
(terminal)
]
(terminal)
}
T_ENCAPSED_AND_WHITESPACE
. This should print a capital 'A': \x41
T_END_HEREDOC
EOT
(terminal)
;
Apéndice Q. Lista de Identificadores (tokens) del Analizador
Varias partes del lenguaje PHP están representadas internamente por cosas tales como T_SR. El PHP muestra identificadores como éste en los errores durante el análisis gramatical, como por ejemplo: "Parse error: unexpected T_SR, expecting ',' or ';' in script.php on line 10." ("Error de análisis: T_SR inesperado, se esperaba ',' o ';' en la línea 10 de script.php.").
Suponemos que sabeis que significa T_SR. Para quienes no lo conocen, aquí hay una tabla con esos identificadores, la sintaxis de PHP, y referencias a lugares apropiados del manual.
Tabla Q-1. Identificadores (Tokens)
| Identificador | Sintaxis | Referencia |
|---|---|---|
| T_AND_EQUAL | &= | Operadores de Asignación |
| T_ARRAY | array() | array(), Sintaxis de array |
| T_ARRAY_CAST | (array) | Forzado de Tipos |
| T_AS | as | foreach |
| T_BAD_CHARACTER | cualquier caracter debajo del ASCII 32, excepto \t (0x09), \n (0x0a) y \r (0x0d) | |
| T_BOOLEAN_AND | && | Operadores Lógicos |
| T_BOOLEAN_OR | || | Operadores Lógicos |
| T_BOOL_CAST | (bool) o (boolean) | Forzado de Tipos |
| T_BREAK | break | break |
| T_CASE | case | switch |
| T_CHARACTER | ||
| T_CLASS | class | Clases y Objetos |
| T_CLOSE_TAG | ?> o %> | |
| T_COMMENT | // o # | Comentarios |
| T_CONCAT_EQUAL | .= | Operadores de Asignación |
| T_CONST | const | |
| T_CONSTANT_ENCAPSED_STRING | "foo" o 'bar' | Sintasis de Cadenas |
| T_CONTINUE | continue | |
| T_CURLY_OPEN | ||
| T_DEC | -- | Operadores de Incremento/decremento |
| T_DECLARE | declare | declare |
| T_DEFAULT | default | switch |
| T_DIV_EQUAL | /= | Operadores de Asignación |
| T_DNUMBER | 0.12, etc. | Números en Punto Flotante |
| T_DO | do | do..while |
| T_DOLLAR_OPEN_CURLY_BRACES | ${ | Sintaxis de Variables Complejas Analizadas |
| T_DOUBLE_ARROW | => | Sintaxis de Matrices |
| T_DOUBLE_CAST | (real), (double) or (float) | Forzado de Tipos |
| T_ECHO | echo | echo() |
| T_ELSE | else | else |
| T_ELSEIF | elseif | elseif |
| T_EMPTY | empty | empty() |
| T_ENCAPSED_AND_WHITESPACE | ||
| T_ENDDECLARE | enddeclare | declare, Sintaxis Alternativa |
| T_ENDFOR | endfor | for, Sintaxis Alternativa |
| T_ENDFOREACH | endforeach | foreach, Sintaxis Alternativa |
| T_ENDIF | endif | if, Sintaxis Alternativa |
| T_ENDSWITCH | endswitch | switch, Sintaxis Alternativa |
| T_ENDWHILE | endwhile | while, Sintaxis Alternativa |
| T_END_HEREDOC | heredoc | |
| T_EVAL | eval() | eval() |
| T_EXIT | exit o die | exit(), die() |
| T_EXTENDS | extends | extends, Clases y Objetos |
| T_FILE | __FILE__ | Constantes |
| T_FOR | for | for |
| T_FOREACH | foreach | foreach |
| T_FUNCTION | function o cfunction | Funciones |
| T_GLOBAL | global | Ambito de Variables |
| T_IF | if | if |
| T_INC | ++ | Operadores de Incremento/decremento |
| T_INCLUDE | include() | include() |
| T_INCLUDE_ONCE | include_once() | include_once() |
| T_INLINE_HTML | ||
| T_INT_CAST | (int) o (integer) | Forzado de Tipos |
| T_ISSET | isset() | isset() |
| T_IS_EQUAL | == | Operadores de Comparación |
| T_IS_GREATER_OR_EQUAL | >= | Operadores de Comparación |
| T_IS_IDENTICAL | === | Operadores de Comparación |
| T_IS_NOT_EQUAL | != o <> | Operadores de Comparación |
| T_IS_NOT_IDENTICAL | !== | Operadores de Comparación |
| T_SMALLER_OR_EQUAL | <= | Operadores de Comparación |
| T_LINE | __LINE__ | Constantes |
| T_LIST | list() | list() |
| T_LNUMBER | 123, 012, 0x1ac, etc. | Enteros |
| T_LOGICAL_AND | and | Operadores Lógicos |
| T_LOGICAL_OR | or | Operadores Lógicos |
| T_LOGICAL_XOR | xor | Operadores Lógicos |
| T_MINUS_EQUAL | -= | Operadores de Asignación |
| T_ML_COMMENT | /* y */ | Comentarios |
| T_MOD_EQUAL | %= | Operadores de Asignación |
| T_MUL_EQUAL | *= | Operadores de Asignación |
| T_NEW | new | Clases y Objetos |
| T_NUM_STRING | ||
| T_OBJECT_CAST | (object) | Forzado de Tipos |
| T_OBJECT_OPERATOR | -> | Clases y Objetos |
| T_OLD_FUNCTION | old_function | old_function |
| T_OPEN_TAG | <?php, <? o <% | Saliendo de HTML |
| T_OPEN_TAG_WITH_ECHO | <?= o <%= | Saliendo de HTML |
| T_OR_EQUAL | |= | Operadores de Asignación |
| T_PAAMAYIM_NEKUDOTAYIM | :: | :: |
| T_PLUS_EQUAL | += | Operadores de Asignación |
| T_PRINT | print() | print() |
| T_REQUIRE | require() | require() |
| T_REQUIRE_ONCE | require_once() | require_once() |
| T_RETURN | return | Retorno de Valores |
| T_SL | << | Operadores a Nivel de Bits |
| T_SL_EQUAL | <<= | Operadores de Asignación |
| T_SR | >> | Operadores a Nivel de Bits |
| T_SR_EQUAL | >>= | Operadores de Asignación |
| T_START_HEREDOC | <<< | heredoc |
| T_STATIC | static | Ambito de las Variables |
| T_STRING | ||
| T_STRING_CAST | (string) | Forzado de Variables |
| T_STRING_VARNAME | ||
| T_SWITCH | switch | switch |
| T_UNSET | unset() | unset() |
| T_UNSET_CAST | (unset) | (no documentado; arroja a NULL) |
| T_USE | use | (no implementado) |
| T_VAR | var | Clases y Objetos |
| T_VARIABLE | $foo | Variables |
| T_WHILE | while | while, do..while |
| T_WHITESPACE | ||
| T_XOR_EQUAL | ^= | Operadores de Asignación |
| T_FUNC_C | __FUNCTION__ | constants, desde PHP 4.3.0 |
| T_CLASS_C | __CLASS__ | constants, desde PHP 4.3.0 |
add a note
User Contributed Notes
Lista de Identificadores (tokens) del Analizador
fgm at osinet dot fr
22-Sep-2008 01:08
nathan at unfinitydesign dot com
22-Sep-2008 05:52
T_ENCAPSED_AND_WHITESPACE is whitespace which intersects a group of tokens. For example, an "unexpected T_ENCAPSED_AND_WHITESPACE" error is produced by the following code:
<?php
$main_output_world = 'snakes!'
echo('There are' 10 $main_output_world);
?>
Note the missing concatenation operator between the two strings leads to the whitespace error that is so named above. The concatenation operator instructs PHP to ignore the whitespace between the two code tokens (the so named "encapsed" data"), rather than parse it as a token itself.
The correct code would be:
<?php
$main_output_world = 'snakes!'
echo('There are' . 10 . $main_output_world);
?>
Note the addition of the concatenation operator between each token.
o_O Tync
03-Aug-2008 08:21
Some tokens are not documented, so here they are:
all of them are located within non-constant ""-strings:
T_CHARACTER - \r\n\t... . They're presented AS IS and NOT replaced with actual characters
T_ENCAPSED_AND_WHITESPACE - whitespace
T_DOLLAR_OPEN_CURLY_BRACES - ${ (ONLY in non-constant ""-strings)
T_STRING - strings (example: "$a aa")
T_NUM_STRING - numbers (exaple: "$a 0")
still have no idea what T_ENCAPSED_AND_WHITESPACE means... :(