Hello everybody. I'm currently trying to install SilverStripe in my Ubuntu with many problems and really does not know how to fix them. Please help me with this issue.

Environment:
-Ubuntu 9.10
-LAMP: (XAMPP 1.7.3a: PHP 5.3.1 & MySQL 5.1.41

At SS install it just stops with the following error:

Friendly URLs are not working. This is most likely because mod_rewrite isn't configuredcorrectly on your site. Please check the following things in your Apache configuration; you may need to get your web host or server administrator to do this for you:

* mod_rewrite is enabled
* AllowOverride All is set for your directory

Refreshing install.php just happens exactly the same. So I tried looking at ".../home/successfullyinstalled?flush=1" just to verify the installation and the following error appears:

[Warning] mb_substr_count() expects at most 3 parameters, 4 given
GET /silverstripe/home/successfullyinstalled?flush=1

Line 304 in /opt/lampp/htdocs/silverstripe/sapphire/core/control/HTTPRequest.php
Source

By the way:
-Of course mod_rewrite is enabled (

) at my httpd.conf
-Also, I added:

to the file. (Even I tested with the root directory <Directory /> allowing override All)

Searching the install.php file of SS, this is the function where things go wrong:

But I did not found any help in the help site or any similar reference (answered) in the forums. I will really appreciate if someone could help me.

I made a sad discovering...

According to the error, it reports that mb_substr_count requires 3 params but in fact the function used is substr_count that really uses 4 parameters

int mb_substr_count ( string $haystack , string $needle [, string $encoding ] )
int substr_count ( string $haystack , string $needle [, int $offset = 0 [, int $length ]] ) THIS IS THE FUNCTION USED!

And according to the error:

wich content is

even the trace tells we are using the mb_ function where we are not:

but the line with the mistake its actually

mm my last option is to install a Win in my VirtualBox and try from there...

and---

THIS IS LAME! silverstripe in windows XAMPP works. I've just installed it, no mistakes
This sucks, maybe XAMPP for linux or my php.ini are not working correctly

Banal:

Thanks, you are right. Php in XAMPP for Linux DOES not includes mbstring library and there's (as far as I know) no simple way to add it to the existing installation but to compile php again. Being this the case:

1-If there's some way to add new extensions (mbstring) to a the XAMPP php implementation, then maybe I still have a chance.

2-If I should recompile php, then XAMPP for Linux SUCKS and I should uninstall it and use Ubuntu official AMP implementation.

Thanks for all.

Like banal said, probably easier to use your package manager. For Ubuntu, I used Synaptic Package Manager to install MySQL 5, PHP 5.2, all the php 5 extensions I could find, and Apache 2.2. All installed easily and it was already working when browsing to http://localhost

Synaptic lists PHP 5 separate of the extensions, so you'll need to search for "php" and then individually select the modules like GD, mbstring, mssql etc to install. It's quite modular this way.

There's a few things you need to do after installing the packages:

1. Enable mod_rewrite by running "sudo a2enmod rewrite"
2. Enable AllowOverride All by editing /etc/apache2/sites-available/default and looking for AllowOverride None and replacing "None" with "All"
3. Rename the sample php.ini file in /etc/php5/apache2 and then set the memory limit inside php.ini to something higher than 16M
4. Restart apache "sudo apache2ctl restart"
5. Place SS into /var/www - e.g. /var/www/silverstripe
6. chmod 777 .htaccess, assets and mysite/_config.php in the SS installation inside /var/www
7. Browse to http://localhost/silverstripe and the installer should appear

Cheers,
Sean