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@ 2013-10-15T17:41:15Z

<?php

namespace Test;

$function = function () {
    return $a + $b . "Hello {$c} World!";
};

// Reflect the closure and fetch relevant properties
$reflection = new \ReflectionFunction($function);
$fileName   = $reflection->getFileName();
$startLine  = $reflection->getStartLine();
$endLine    = $reflection->getEndLine();

// Slice out the lines
$lines = array_slice(file($fileName), $startLine - 1, ($endLine - $startLine) + 1);
$code  = sprintf('<?php %s ; ?>', implode($lines));

// Tokenize and filter T_WHITESPACE
$tokens = array_filter(token_get_all($code), function ($token) {
    return !(is_array($token) && $token[0] === T_WHITESPACE);
});

// Dump for shits and giggles
foreach ($tokens as $token)
{
    echo PHP_EOL;
    if (is_array($token))
    {
        echo str_pad(token_name($token[0]), 30, '.') . trim($token[1]);
        continue;
    }
    echo str_pad('SYMBOL', 30, '.') . $token;
}

Output for git.master, git.master_jit, rfc.property-hooks: T_OPEN_TAG....................<?php T_VARIABLE....................$function SYMBOL........................= T_FUNCTION....................function SYMBOL........................( SYMBOL........................) SYMBOL........................{ T_RETURN......................return T_VARIABLE....................$a SYMBOL........................+ T_VARIABLE....................$b SYMBOL......................... SYMBOL........................" T_ENCAPSED_AND_WHITESPACE.....Hello T_CURLY_OPEN..................{ T_VARIABLE....................$c SYMBOL........................} T_ENCAPSED_AND_WHITESPACE.....World! SYMBOL........................" SYMBOL........................; SYMBOL........................} SYMBOL........................; SYMBOL........................; T_CLOSE_TAG...................?>

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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