Req #64608 [Asn->Csd]: Anonymous Function Dereferencing

Edit report at https://bugs.php.net/bug.php?id=64608&edit=1 ID: 64608 Updated by: nikic@php.net Reported by: j dot doyle133 at gmail dot com Summary: Anonymous Function Dereferencing -Status: Assigned +Status: Closed Type: Feature/Change Request Package: *General Issues Operating System: All PHP Version: 5.5.0beta1 Assigned To: laruence Block user comment: N Private report: N New Comment: This FR has been implemented by https://wiki.php.net/rfc/uniform_variable_syntax in PHP 7. Both f()() and (function() {})() are supported now. Previous Comments: ------------------------------------------------------------------------ [2014-06-30 10:49:52] tom at r dot je Is there any update on this? Currently, this does not work: function f() { return function() { return 'foo'; }; } echo f()(); and results in a parse error: Parse error: syntax error, unexpected '(', expecting ',' or ';' This is fixed using function f() { return function() { return 'foo'; }; } $closure = f() echo $closure(); but it would be less verbose if closures were treated like arrays and properly dereferenced in these cases. ------------------------------------------------------------------------ [2013-04-08 02:48:52] laruence@php.net there is already a PR about this. https://github.com/php/php-src/pull/301 ------------------------------------------------------------------------ [2013-04-07 23:09:05] j dot doyle133 at gmail dot com Description: ------------ The anonymous functions wouldn't really be complete without dereferencing, making it easier for developers to split their code up into chunks, and having one return value. Database calls that are only going to be called once for example, but need to be stored in an array. There's no point making a whole function for it and no point setting it to a variable to be run once. Test script: --------------- $my_array = [ 'key_1' => function() { return mt_rand(); }(), 'database' => function() { $db = new PDO("mysql:host=127.0.0.1; port=3306;", "root", ""); $sth = $db->prepare("SELECT * FROM users WHERE username=? LIMIT 1"); $sth->bindParam(1, 'Test'); $sth->execute(); return $sth->fetch(PDO::FETCH_ASSOC); }() ]; Expected result: ---------------- An array with two values, a random value on 'key_1' and an associative array on 'database'. Actual result: -------------- Parse error: syntax error, unexpected '(', expecting ']' in php shell code on line 4 When leaving out the parentheses; two closure classes. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=64608&edit=1