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token_get_all

(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)

token_get_allDivide la fuente dada en tokens PHP

Descripción

token_get_all(string $code, int $flags = 0): array

token_get_all() parsea el string de la source dada en tokens PHP usando el escaneador de léxico de Zend Engine.

Para ver la lista de los tokens analizados, vea Lista de componentes léxicos del analizador, o use token_name() para traducir un valor token en su representación en string.

Parámetros

source

La fuente PHP a analizar.

flags

Banderas válidas:

  • TOKEN_PARSE - Reconoce la capacidad de usar palabras reservadas en contextos específicos.

flags

Valores válidos:

  • TOKEN_PARSE - Reconoce la capacidad de usar palabras reservadas en contextos específicos.

Valores devueltos

Un array de tokens identificadores. Cada token identificador individual es al mismo tiempo un carácter único (por ejemplo: ;, ., >, !, etc...), un array de tres elementos conteniendo el índice de token en el elemento 0, el contenido del string del token original en el elemento 1 y el número de línea en el elemento 2.

Ejemplos

Ejemplo #1 token_get_all() ejemplos

<?php
$tokens
= token_get_all('<?php echo; ?>');

foreach (
$tokens as $token) {
if (
is_array($token)) {
echo
"Line {$token[2]}: ", token_name($token[0]), " ('{$token[1]}')", PHP_EOL;
}
}
?>

El resultado del ejemplo sería algo similar a:

Line 1: T_OPEN_TAG ('<?php ')
Line 1: T_ECHO ('echo')
Line 1: T_WHITESPACE (' ')
Line 1: T_CLOSE_TAG ('?>')

Ejemplo #2 token_get_all() ejemplo de uso incorrecto

<?php
$tokens
= token_get_all('/* comment */');

foreach (
$tokens as $token) {
if (
is_array($token)) {
echo
"Line {$token[2]}: ", token_name($token[0]), " ('{$token[1]}')", PHP_EOL;
}
}
?>

El resultado del ejemplo sería algo similar a:

Line 1: T_INLINE_HTML ('/* comment */')
Ten en cuenta en el ejemplo anterior que la cadena se analiza como T_INLINE_HTML en lugar del esperado T_COMMENT. Esto se debe a que no se utilizó ninguna etiqueta de apertura en el código proporcionado. Esto sería equivalente a colocar un comentario fuera de las etiquetas PHP en un archivo normal.

Ejemplo #3 token_get_all() en un ejemplo de clase que usa una palabra reservada

<?php

$source
= <<<'code'
<?php

class A
{
const PUBLIC = 1;
}
code;

$tokens = token_get_all($source, TOKEN_PARSE);

foreach (
$tokens as $token) {
if (
is_array($token)) {
echo
token_name($token[0]) , PHP_EOL;
}
}

?>

El resultado del ejemplo sería algo similar a:

T_OPEN_TAG
T_WHITESPACE
T_CLASS
T_WHITESPACE
T_STRING
T_CONST
T_WHITESPACE
T_STRING
T_LNUMBER
Sin la bandera TOKEN_PARSE, el penúltimo token (T_STRING) habría sido T_PUBLIC.

Ejemplo #4 ejemplo de token_get_all() usado en una clase con una palabra reservada

<?php

$source
= <<<'code'
<?php

class A
{
const PUBLIC = 1;
}
code;

$tokens = token_get_all($source, TOKEN_PARSE);

foreach (
$tokens as $token) {
if (
is_array($token)) {
echo
token_name($token[0]) , PHP_EOL;
}
}
?>

El resultado del ejemplo sería algo similar a:

T_OPEN_TAG
T_WHITESPACE
T_CLASS
T_WHITESPACE
T_STRING
T_CONST
T_WHITESPACE
T_STRING
T_LNUMBER
Sin el uso de TOKEN_PARSE, el penúltimo token (T_STRING) hubiese sido T_PUBLIC.

Ver también

add a note

User Contributed Notes 8 notes

up
2
Ivan Ustanin
5 years ago
As a caution: when using TOKEN_PARSE with an invalid php-file, one can get an error like this:
Parse error: syntax error, unexpected '__construct' (T_STRING), expecting function (T_FUNCTION) or const (T_CONST) in on line 15
Notice the missing filename as this function accepts a string, not a filename and thus has no idea of the latter.
However an exception would be more appreciated.
up
2
Theriault
7 years ago
The T_OPEN_TAG token will include the first trailing newline (\r, \n, or \r\n), tab (\t), or space. Any additional space after this token will be in a T_WHITESPACE token.

The T_CLOSE_TAG token will include the first trailing newline (\r, \n, or \r\n; as described here http://php.net/manual/en/language.basic-syntax.instruction-separation.php). Any additional space after this token will be in a T_INLINE_HTML token.
up
4
Dennis Robinson from basnetworks dot net
14 years ago
I wanted to use the tokenizer functions to count source lines of code, including counting comments. Attempting to do this with regular expressions does not work well because of situations where /* appears in a string, or other situations. The token_get_all() function makes this task easy by detecting all the comments properly. However, it does not tokenize newline characters. I wrote the below set of functions to also tokenize newline characters as T_NEW_LINE.

<?php

define
('T_NEW_LINE', -1);

function
token_get_all_nl($source)
{
$new_tokens = array();

// Get the tokens
$tokens = token_get_all($source);

// Split newlines into their own tokens
foreach ($tokens as $token)
{
$token_name = is_array($token) ? $token[0] : null;
$token_data = is_array($token) ? $token[1] : $token;

// Do not split encapsed strings or multiline comments
if ($token_name == T_CONSTANT_ENCAPSED_STRING || substr($token_data, 0, 2) == '/*')
{
$new_tokens[] = array($token_name, $token_data);
continue;
}

// Split the data up by newlines
$split_data = preg_split('#(\r\n|\n)#', $token_data, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);

foreach (
$split_data as $data)
{
if (
$data == "\r\n" || $data == "\n")
{
// This is a new line token
$new_tokens[] = array(T_NEW_LINE, $data);
}
else
{
// Add the token under the original token name
$new_tokens[] = is_array($token) ? array($token_name, $data) : $data;
}
}
}

return
$new_tokens;
}

function
token_name_nl($token)
{
if (
$token === T_NEW_LINE)
{
return
'T_NEW_LINE';
}

return
token_name($token);
}

?>

Example usage:

<?php

$tokens
= token_get_all_nl(file_get_contents('somecode.php'));

foreach (
$tokens as $token)
{
if (
is_array($token))
{
echo (
token_name_nl($token[0]) . ': "' . $token[1] . '"<br />');
}
else
{
echo (
'"' . $token . '"<br />');
}
}

?>

I'm sure you can figure out how to count the lines of code, and lines of comments with these functions. This was a huge improvement on my previous attempt at counting lines of code with regular expressions. I hope this helps someone, as many of the user contributed examples on this website have helped me in the past.
up
4
gomodo at free dot fr
14 years ago
Yes, some problems (On WAMP, PHP 5.3.0 ) with get_token_all()

1 : bug line numbers
Since PHP 5.2.2 token_get_all() should return Line numbers in element 2..
.. but for instance (5.3.0 on WAMP), it work perfectly only with PHP code (not HMTL miwed), but if you have some T_INLINE_HTML detected by token_get_all() , sometimes you find wrongs line numbers (return next line)... :(

2: bug warning message can impact loops
Warning with php code uncompleted (ex : php code line by line) :
for example if a comment tag is not closed token_get_all() can block loops on this warning :
Warning: Unterminated comment starting line

This problem seem not occur in CLI mod (php command line), but only in web mod.

Waiting more stability, used token_get_all() only on PHP code (not HMTL miwed) :
First extract entirely PHP code (with open et close php tag),
Second use token_get_all() on the pure PHP code.

3 : Why there not function to extract PHP code (to extract HTML, we have Tidy..)?

Waiting, I used a function :

The code at end this post :
http://www.developpez.net/forums/d786381/php/langage/
fonctions/analyser-fichier-php-token_get_all/

This function not support :
- Old notation : "<? ?>" and "<% %>"
- heredoc syntax
- nowdoc syntax (since PHP 5.3.0)
up
1
bart
6 years ago
Not all tokens are returned as an array. The rule appears to be that if a token is not variable, but instead it is one particular constant string, it is returned as a string instead. You don't get a line number. This is the case for braces( "{", "}"), parentheses ("(", ")"), brackets ("[", "]"), comma (","), semi-colon (";"), and a whole slew of operator signs ("!", "=", "+", "*", "/", ".", "+=", ...).
up
-9
kevin at metalaxe dot com
15 years ago
Rogier, thanks for that fix. This bug still exists in php 5.2.5. I did notice though that it is possible for a notice to pop up from your code. Changing this line:

$temp[] = $tokens[0][2];

To read this:

$temp[] = isset($tokens[0][2])?$tokens[0][2]:'unknown';

fixes this notice.
up
-13
rogier
16 years ago
Complementary note to code below:
Note that only the FIRST 2 (or 3, if needed) array elements will be updated.

Since I only encountered incorrect results on the FIRST occurence of T_OPEN_TAG, I wrote this quick fix.
Any other following T_OPEN_TAG are, on my testing system (Apache 2.0.52, PHP 5.0.3), parsed correctly.

So, This function assumes only a possibly incorrect first T_OPEN_TAG.
Also, this function assumes the very first element (and ONLY the first element) of the token array to be the possibly incorrect token.
This effectively translates to the first character of the tokenized source to be the start of a php script opening tag '<', followed by either 'php' OR '%' (ASP_style)
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