EDIT: Actually, it's NOT solved :/ I still have the warning. See post #2

Hi.

I uploaded my site to my host today (www.haisoft.fr) and I got those error in logs :

[01-Apr-2009 08:49:22] Warning at sapphire/core/control/HTTPRequest.php line 303: mb_substr_count() expects at most 3 parameters, 4 given (http://renaudmerle.fr/book-portfolio-identite-visuelle/)
[01-Apr-2009 08:49:22] Warning at sapphire/core/control/HTTPRequest.php line 303: mb_substr_count() expects at most 3 parameters, 4 given (http://renaudmerle.fr/book-portfolio-identite-visuelle/)
[01-Apr-2009 08:49:22] Warning at sapphire/core/control/HTTPRequest.php line 303: mb_substr_count() expects at most 3 parameters, 4 given (http://renaudmerle.fr/book-portfolio-identite-visuelle/)
[01-Apr-2009 08:49:22] Warning at sapphire/core/control/HTTPRequest.php line 303: mb_substr_count() expects at most 3 parameters, 4 given (http://renaudmerle.fr/book-portfolio-identite-visuelle/)
[01-Apr-2009 08:49:22] Warning at sapphire/core/SSViewer.php line 494: mb_ereg_replace() [<a href='function.mb-ereg-replace'>function.mb-ereg-replace</a>]: mbregex compile err: unmatched close parenthesis (http://renaudmerle.fr/book-portfolio-identite-visuelle/)
[01-Apr-2009 08:49:22] Warning at sapphire/core/SSViewer.php line 496: mb_ereg_replace() [<a href='function.mb-ereg-replace'>function.mb-ereg-replace</a>]: mbregex compile err: unmatched close parenthesis (http://renaudmerle.fr/book-portfolio-identite-visuelle/)

The function call is actually

$shiftCount = substr_count($pattern, '/', 0, $doubleSlashPoint) + 1;

I discovered the mbstring php module was activated with the auto-overload option set on, and thus it was replacing (without any success) the regular string functions.

I haded this line in my _config.php and it worked like a charm :

ini_set( 'mbstring.func_overload', '0' );

and this line to my .htaccess :

php_value "mbstring.func_overload" "0"

Best regards.

Actually it's not that solved :/ I still have the warning.

I do not have those errors on my local host, but the local config of the Mbstring module is the same as the one on my online host.
Here is the online phpinfo : http://renaudmerle.fr/infos.php

Anyone has an idea ?

Best regards.

Did you ever fix this? I've got the same issue. mbstring.func_overload fixed it for a second, but then it broke again.

Not yet.

My host's tech service is currently exploring the issue.

The error is hardly reproducible. I get the most of warnings when accessing /Security/login?isDev=1

Yeah, my host's tech was quick to push the problem on Silverstripe. No surprise there. I find the error is pretty intermittent, too. Please make a post here if you ever get it resolved. My client is going batty.

Well, because this issue is harmless, I deactivated warnings display. I get warnings by e-mail and get quite spammed though :p

How did you do that?

in _config.php :

Director::set_environment_type( 'live' );
if( Director::isLive() ) {
    Debug::send_warnings_to( 'me@mail.com' );
}

Then, if I still want to get warning messages printed online instead of being emailed, I add the ?isDev=1 parameter.