Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:15375
Return-Path: <ilia@prohost.org>
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Delivered-To: mailing list internals@lists.php.net
Received: (qmail 59837 invoked by uid 1010); 11 Mar 2005 19:36:29 -0000
Delivered-To: ezmlm-scan-internals@lists.php.net
Delivered-To: ezmlm-internals@lists.php.net
Received: (qmail 59785 invoked from network); 11 Mar 2005 19:36:28 -0000
Received: from unknown (HELO pb1.pair.com) (127.0.0.1)
  by localhost with SMTP; 11 Mar 2005 19:36:28 -0000
X-Host-Fingerprint: 70.85.46.36 unknown  
Received: from ([70.85.46.36:45687] helo=prohost.org)
	by pb1.pair.com (ecelerity HEAD r(5124)) with SMTP
	id 2A/47-31540-C33F1324 for <internals@lists.php.net>; Fri, 11 Mar 2005 14:36:28 -0500
Received: (qmail 19822 invoked from network); 11 Mar 2005 19:36:17 -0000
Received: from cpe00095beeab35-cm000f9f7d6664.cpe.net.cable.rogers.com (HELO ?192.168.1.101?) (69.196.31.219)
	by prohost.org with SMTP; 11 Mar 2005 19:36:17 -0000
Message-ID: <4231F330.6000705@prohost.org>
Date: Fri, 11 Mar 2005 14:36:16 -0500
User-Agent: Mozilla Thunderbird 1.0 - [MOOX M3] (Windows/20041208)
X-Accept-Language: en-us, en
MIME-Version: 1.0
To: internals@lists.php.net
X-Enigmail-Version: 0.89.5.0
X-Enigmail-Supports: pgp-inline, pgp-mime
Content-Type: multipart/mixed;
	boundary="------------030308040903010706070904"
Subject: HALT Patch
From: ilia@prohost.org (Ilia Alshanetsky)

--------------030308040903010706070904
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit

The attach patch implements a special "token" <?php HALT; ?> that can be 
used to stop the Zend lexical parser from parsing any data after this 
token.

The idea behind this patch is to allow tucking on of any data (binary 
and otherwise) to the PHP script without having to encode it. It also 
saves on memory/cpu that normally be used/needed to parse the data. 
Memory is particularly important point, since many systems run with 
default memory limit (8 megs) and would easily hit it when a script had 
a 2-4 megs of data tacked on.

The patch would be extremely helpful for application distribution where 
the entire install/upgrade script can be just a single script.

The syntax chosen for the patch was design specifically in such a way as 
to not cause parser errors in older PHPs without the support for this 
feature.

Ilia

--------------030308040903010706070904
Content-Type: text/plain;
 name="halt.txt"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
 filename="halt.txt"

Index: Zend/zend_language_scanner.l
===================================================================
RCS file: /repository/ZendEngine2/zend_language_scanner.l,v
retrieving revision 1.124
diff -u -a -p -r1.124 zend_language_scanner.l
--- Zend/zend_language_scanner.l	7 Mar 2005 16:48:49 -0000	1.124
+++ Zend/zend_language_scanner.l	11 Mar 2005 19:30:47 -0000
@@ -1342,6 +1342,10 @@ NEWLINE ("\r"|"\n"|"\r\n")
 	return T_INLINE_HTML;
 }
 
+<INITIAL>"<?php"{WHITESPACE}"HALT;"{WHITESPACE}*"?>" {
+	yyterminate();
+}
+
 <INITIAL>"<?"|"<script"{WHITESPACE}+"language"{WHITESPACE}*"="{WHITESPACE}*("php"|"\"php\""|"\'php\'"){WHITESPACE}*">" {
 	HANDLE_NEWLINES(yytext, yyleng);
 	if (CG(short_tags) || yyleng>2) { /* yyleng>2 means it's not <? but <script> */

--------------030308040903010706070904--