RE: [PHP-QA] ereg_replace returns wrong characters

At 17:15 5/2/2002 +0100, Liz wrote:

I was gonna say, I ran this script and it returned exactly what I thought it should.. So, Im puzzled to. Can you do a script and comment at the end what output you were expecting?

Here's a good example: <?php $pat = "^([&]?)foo([&]?)$"; $string = "foo"; echo '['.ereg_replace($pat, "\\1", $string).']'; $string = '&foo'; echo '['.ereg_replace($pat, "\\1", $string).']'; $string = 'xfoo'; echo '['.ereg_replace($pat, "\\1", $string).']'; $pat = "/^([&]?)foo([&]?)$/"; $string = "foo"; echo '['.preg_replace($pat, "$1", $string).']'; $string = '&foo'; echo '['.preg_replace($pat, "$1", $string).']'; $string = 'xfoo'; echo '['.preg_replace($pat, "$1", $string).']'; ?> As soon as the match is empty, ereg_replace returns \1. An empty match IS a match however in this case. I've modified the regex, cause an OR for "it's the beginning" or "it's that character" looks confusing.

-----Original Message----- From: derick@php.net [mailto:derick@php.net] Sent: Thursday, May 02, 2002 8:57 AM To: andrei@php.net; Rui Hirokawa Cc: PHP Quality Assurance Team Mailing List Subject: Re: [PHP-QA] ereg_replace returns wrong characters Hello, as far as I know the current behavior is the right one. Andrei, can you enlighten us? Derick On Thu, 2 May 2002, Rui Hirokawa wrote:

I think the bug #16969 is critical one because it affects PHPlib's session id propagation in GET mode. I made a patch to fix this problem. Could I apply this fix for PHP 4.2.1RC1/PHP 4.3.0dev ? ------------------------------------------------- Bug #16959: ereg_replace returns wrong characters This is small script for testing. <?php $pat = "(^|&)foo(&|$)"; $string = "foo"; echo ereg_replace($pat, "\\1", $string); ?> In PHP <= 4.1.x, this script returns empty string. But, PHP 4.2.0 and PHP 4.2.1RC1 return '\1'. The return value in PHP >= 4.2.0 should be corrected. ereg_replace() is used for session id propagation in GET

mode of PHPlib.

It is not work well because it is affected by this problem. -- ----------------------------------------------------- Rui Hirokawa <rui_hirokawa@ybb.ne.jp>

             <hirokawa@php.net>

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