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Date: Fri, 11 Mar 2005 15:22:56 -0500
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To: Ilia Alshanetsky <ilia@prohost.org>
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Subject: Re: [PHP-DEV] HALT Patch
From: john@coggeshall.org (John Coggeshall)

We've been talking about this on IRC for awhile now and I think it's a
nice patch to minimize memory usage when you want to create these sorts
of "bundled" PHP/data hybrid scripts.

John

On Fri, 2005-03-11 at 14:36, Ilia Alshanetsky wrote:
> 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
> 
> ______________________________________________________________________
> 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> */
> 
> 
> ______________________________________________________________________
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