Re: Re: Bug #16739 Updated: `print' variable function call

From: Date: Sat, 11 May 2002 02:04:07 +0000
Subject: Re: Re: Bug #16739 Updated: `print' variable function call
References: 1 2  Groups: php.dev php.doc 
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derick@php.net wrote:
On Fri, 10 May 2002, brad lafountain wrote:
I dont' think its too much of a mess PHP_FUNCTION(echo) { char *mess; int mess_len; if(zend_parse_parameters(*) == SUCCESS) php_write(buf, size TSRMLS_CC); } What you gain is allowing people to do the following code and you don't get posts up here saying this and that dont work properly.
1. You get ambigiuty in the parser, so your function will only work when called indirectly. 2. echo as language contruct works fine 3. You can easily make a wrapper in PHP
I understand you are talking about technical issue. However, I would like to memntion documentaton issue. PHP manual is missing language core design documentation. 1) Tokens/Reserved words 2) BNF 3) Reserved method names (__method?) From users point of view, print is function and supposed to work as if it is function unless there is documentation for 1) and 2). IMHO, we need someone who documents language design.... -- Yasuo Ohgaki
Derick
On Fri, 10 May 2002, Markus Fischer wrote:
Hi, can someone state the technical problems we're facing? I'ld rather see this documented (whether it works or no, but documenting).
print is implemented in the scanner level as token (T_PRINT) and that prohibits it for use as function. It's only a problem if we make this a function because of *big sigh* BC issues, print "" works now, but won't work if it's a function. (Only print (""); ). The same is true for echo. Derick
On Fri, May 10, 2002 at 08:04:25AM +0200, Derick Rethans wrote :
Hello, as far as I know this never worked, the wisest thing to do is to
remove
it
from the documentation, as I don't see this fixed anytime soon (or
not at
all). Derick On 10 May 2002 philip@php.net wrote: 
ID:               16739
Updated by:       philip@php.net
Reported By:      marshall@magpcss.com
-Status:           Open
+Status:           Analyzed
Bug Type:         Variables related
Operating System: FreeBSD 4.5,RedHat 2.4.7,Win XP 
-PHP Version:      4.1.2
+PHP Version:      4.3.0-dev
New Comment: Confirmed with PHP 4.3.0-dev (cgi) (may 09, 2002) PHP Fatal error: Call to undefined function: print() in... This behavior is documented as working in at least two places. These changes to phpdoc were made on March 05, 2002. So: a) Did this used to work? b) Will it work in the future? c) Should this be documented/undocumented? I'm guessing it never worked but may in the future. In the very least, a version of (c) needs to happen. I can only confirm 4.1.2 through php4-cvs at this time. print:
http://cvs.php.net/diff.php/phpdoc/en/functions/strings.xml?r1=1.164&r2=1.165
Variable functions:
http://cvs.php.net/diff.php/phpdoc/en/language/functions.xml?r1=1.24&r2=1.25
Previous Comments:
------------------------------------------------------------------------
[2002-04-22 23:54:40] marshall@magpcss.com According to the official PHP documentation [http://www.php.net/manual/en/functions.variable-functions.php] the language construct `print' can be called as a variable function.
The
following code should therefore be valid: $myfunc = 'print'; $myfunc('My text to print'); Attempting to execute this code on any platform returns a "Fatal
error:
Call to undefined function: print()" message.
------------------------------------------------------------------------
-- Edit this bug report at http://bugs.php.net/?id=16739&edit=1
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