Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:27225
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Received-SPF: error (pb1.pair.com: domain netsoc.tcd.ie from 134.226.83.42 cause and error)
Date: Sun, 31 Dec 2006 14:45:18 +0000
To: internals@lists.php.net
Message-ID: <20061231144518.GB15021@netsoc.tcd.ie>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
User-Agent: Mutt/1.5.9i
Subject: calling zend_eval_string
From: devriese@cs.tcd.ie (Edsko de Vries)

Hi,

If I try to call zend_eval_string as follows:

zval* retval;
MAKE_STD_ZVAL(retval);
zend_eval_string("return 5;", retval, "eval'd code" TSRMLS_CC);

I get the following runtime error:

eval'd code(1) : Parse error - syntax error, unexpected T_RETURN

It turns out that zend_eval_string actualy prepends "return " to the
argument to zend_eval_string (zend_execute_API.c, around line 1577),
causing "return return 5;" to be evaluated - hence the error. Why is
that the case? Is there a different function I could call that doesn't
do this? (The problem is that the code will be user-supplied, not
written by be; so to work-around this problem, I'd have to check if the
user-supplied code starts with "return "; if so, remove it, only for it
to be added again by zend_eval_string).

What is the proper solution to this problem?

Thanks in advance,

Edsko