Comments on: Lexical scope to appear in PHP? http://www.sitepoint.com/blogs/2007/12/23/lexical-scope-to-appear-in-php/ News, opinion, and fresh thinking for web developers and designers. The official podcast of sitepoint.com. Sun, 08 Nov 2009 20:06:11 -0500 http://wordpress.org/?v=2.8.4 hourly 1 By: P. Aichpy http://www.sitepoint.com/blogs/2007/12/23/lexical-scope-to-appear-in-php/comment-page-1/#comment-918563 P. Aichpy Thu, 16 Apr 2009 20:05:33 +0000 http://www.sitepoint.com/blogs/2007/12/23/lexical-scope-to-appear-in-php/#comment-918563 I posted a feature request last year for an optional lexical scoping keyword. Unfortunately it seems to be just collecting dust: http://bugs.php.net/bug.php?id=46504 The lack of this feature and a pre-execution check for undeclared variables (like 'use strict' in Perl) are 2 things that make PHP truly suck right now. I posted a feature request last year for an optional lexical scoping keyword. Unfortunately it seems to be just collecting dust:
http://bugs.php.net/bug.php?id=46504

The lack of this feature and a pre-execution check for undeclared variables (like ‘use strict’ in Perl) are 2 things that make PHP truly suck right now.

]]> By: ArkInfotec.com » Blog Archive » Keeping Current With PHP http://www.sitepoint.com/blogs/2007/12/23/lexical-scope-to-appear-in-php/comment-page-1/#comment-774608 ArkInfotec.com » Blog Archive » Keeping Current With PHP Tue, 05 Aug 2008 08:29:36 +0000 http://www.sitepoint.com/blogs/2007/12/23/lexical-scope-to-appear-in-php/#comment-774608 [...] which - as the name implies - contains RFC’s for improvements of the language. I’ve rambled on about closures and lambdas before, but as you can see, there is now an accepted patch. Whether it’ll make it into 5.3 is [...] [...] which – as the name implies – contains RFC’s for improvements of the language. I’ve rambled on about closures and lambdas before, but as you can see, there is now an accepted patch. Whether it’ll make it into 5.3 is [...]

]]> By: SitePoint PHP Blog: Keeping current with PHP | Development Blog With Code Updates : Developercast.com http://www.sitepoint.com/blogs/2007/12/23/lexical-scope-to-appear-in-php/comment-page-1/#comment-761977 SitePoint PHP Blog: Keeping current with PHP | Development Blog With Code Updates : Developercast.com Wed, 16 Jul 2008 14:09:09 +0000 http://www.sitepoint.com/blogs/2007/12/23/lexical-scope-to-appear-in-php/#comment-761977 [...] which - as the name implies - contains RFC’s for improvements of the language. I’ve rambled on about closures and lambdas before, but as you can see, there is now an accepted patch. Whether it’ll make it into 5.3 is [...] [...] which – as the name implies – contains RFC’s for improvements of the language. I’ve rambled on about closures and lambdas before, but as you can see, there is now an accepted patch. Whether it’ll make it into 5.3 is [...]

]]> By: kyberfabrikken http://www.sitepoint.com/blogs/2007/12/23/lexical-scope-to-appear-in-php/comment-page-1/#comment-622803 kyberfabrikken Sun, 03 Feb 2008 10:39:41 +0000 http://www.sitepoint.com/blogs/2007/12/23/lexical-scope-to-appear-in-php/#comment-622803 Hi Marcus, That would be: http://del.icio.us/kyberfabrikken Hi Marcus,

That would be:
http://del.icio.us/kyberfabrikken

]]> By: lastcraft http://www.sitepoint.com/blogs/2007/12/23/lexical-scope-to-appear-in-php/comment-page-1/#comment-622389 lastcraft Sat, 02 Feb 2008 21:58:50 +0000 http://www.sitepoint.com/blogs/2007/12/23/lexical-scope-to-appear-in-php/#comment-622389 Hi Troels... What is your delicious name? I suspect we may have quite a few bookmarks in common. yours, Marcus Hi Troels…

What is your delicious name? I suspect we may have quite a few bookmarks in common.

yours, Marcus

]]> By: honeymonster http://www.sitepoint.com/blogs/2007/12/23/lexical-scope-to-appear-in-php/comment-page-1/#comment-577867 honeymonster Sun, 30 Dec 2007 16:14:24 +0000 http://www.sitepoint.com/blogs/2007/12/23/lexical-scope-to-appear-in-php/#comment-577867 Seems this is sort of a half-baked closure. The lexical scoping rules is at odds with the object orientation of PHP5. You cannot access/capture member variables the sorrounding class without assigning them to a local variable first. This will probably work because of the rather strange alias assignment; so that you can do $localvar = $membervar; before accessing $localvar from inside the "closure". Does this work for simple types as well, or will the closure simply operate on the captured <em>values</em>? To some extent this is analogous to the "assign before return" requirement like "return $dummy=(some expression)". It is still not very elegant, though. Seems this is sort of a half-baked closure. The lexical scoping rules is at odds with the object orientation of PHP5. You cannot access/capture member variables the sorrounding class without assigning them to a local variable first. This will probably work because of the rather strange alias assignment; so that you can do $localvar = $membervar; before accessing $localvar from inside the “closure”.

Does this work for simple types as well, or will the closure simply operate on the captured values?

To some extent this is analogous to the “assign before return” requirement like “return $dummy=(some expression)”. It is still not very elegant, though.

]]> By: developercast.com » SitePoint PHP Blog: Lexical scope to appear in PHP? http://www.sitepoint.com/blogs/2007/12/23/lexical-scope-to-appear-in-php/comment-page-1/#comment-570187 developercast.com » SitePoint PHP Blog: Lexical scope to appear in PHP? Tue, 25 Dec 2007 16:21:03 +0000 http://www.sitepoint.com/blogs/2007/12/23/lexical-scope-to-appear-in-php/#comment-570187 [...] this new post to the SitePoint PHP blog, Troels Knak-Nielsen talks about some of the advancements (and [...] [...] this new post to the SitePoint PHP blog, Troels Knak-Nielsen talks about some of the advancements (and [...]

]]> By: binjured http://www.sitepoint.com/blogs/2007/12/23/lexical-scope-to-appear-in-php/comment-page-1/#comment-568889 binjured Mon, 24 Dec 2007 14:07:26 +0000 http://www.sitepoint.com/blogs/2007/12/23/lexical-scope-to-appear-in-php/#comment-568889 This is another case of PHP being "dumb," for lack of a better term. Why can't it just <em>know</em> the correct scope of <em>x</em>? Introducing this would probably cause more confusion than anything, created by people trying to create a normal anonymous function without using this "lexical" keyword. How about... <code> def f1(x): return lambda y: x + y f1(2)(8) # return 10 </code> (Brought to you by the <em>United Alliance for a Python Forum on SitePoint</em>) This is another case of PHP being “dumb,” for lack of a better term. Why can’t it just know the correct scope of x? Introducing this would probably cause more confusion than anything, created by people trying to create a normal anonymous function without using this “lexical” keyword.

How about…
def f1(x): return lambda y: x + y f1(2)(8) # return 10
(Brought to you by the United Alliance for a Python Forum on SitePoint)

]]> By: » Blog Archive » Lexical scope to appear in PHP - SitePoint http://www.sitepoint.com/blogs/2007/12/23/lexical-scope-to-appear-in-php/comment-page-1/#comment-568651 » Blog Archive » Lexical scope to appear in PHP - SitePoint Mon, 24 Dec 2007 10:03:23 +0000 http://www.sitepoint.com/blogs/2007/12/23/lexical-scope-to-appear-in-php/#comment-568651 [...] Lexical scope to appear in PHP - SitePointLexical scope to appear in PHPSitePoint, Australia - Dec 22, 2007Since then, I brought up Wez? original patch again on the php-internals lists. This has prompted some hefty debate over the last week. … [...] [...] Lexical scope to appear in PHP – SitePointLexical scope to appear in PHPSitePoint, Australia – Dec 22, 2007Since then, I brought up Wez? original patch again on the php-internals lists. This has prompted some hefty debate over the last week. … [...]

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