Skip to main content

This site requires you to update your browser. Your browsing experience maybe affected by not having the most up to date version.

Installing SilverStripe

Getting SilverStripe up and running on your computer and on your web server.

Moderators: martimiz, Sean, biapar, Willr, Ingo, swaiba, simon_w

URGENT HELP! Friendly URL not working and mb_substr_count() Parameter Errors


7 Posts   2794 Views


24 February 2010 at 11:10pm (Last edited: 24 February 2010 11:12pm), Community Member, 4 Posts

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.

-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

296       // Special case for the root URL controller
297       if(!$pattern) {
298          return ($this->dirParts == array()) ? array('Matched' => true) : false;
299       }
301       // Check for the '//' marker that represents the "shifting point"
302       $doubleSlashPoint = strpos($pattern, '//');
303       if($doubleSlashPoint !== false) {
304          $shiftCount = substr_count($pattern, '/', 0, $doubleSlashPoint) + 1;
305          $pattern = str_replace('//', '/', $pattern);
306          $patternParts = explode('/', $pattern);
309       } else {
310          $patternParts = explode('/', $pattern);


* mb_substr_count(admin/security//$Action/$ID/$OtherID,/,0,14)
Line 304 of HTTPRequest.php
* HTTPRequest->match(admin/security//$Action/$ID/$OtherID,1)
Line 247 of Director.php
* Director::handleRequest(HTTPRequest,Session)
Line 121 of Director.php
* Director::direct(/home/successfullyinstalled)
Line 118 of main.php

By the way:
-Of course mod_rewrite is enabled (

LoadModule rewrite_module modules/

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

<Directory "/opt/lampp/htdocs/silverstripe">
Options FollowSymLinks SymLinksifOwnerMatch
AllowOverride All
Order allow,deny
Allow from all

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:

function checkModRewrite() {
   if(typeof $ == 'undefined') {
   } else {
         method: 'get',
         url: 'InstallerTest/testrewrite',
         complete: function(response) {
            if(response.responseText == 'OK') {
            } else { HERES THE PROBLEM
               $('#ModRewriteResult').html("Friendly URLs are not working. This is most likely because mod_rewrite isn't configured"
                  + "correctly 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:"
                  + "<ul><li>mod_rewrite is enabled</li><li>AllowOverride All is set for your directory</li></ul>");

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.


25 February 2010 at 12:11am Community Member, 4 Posts

Another note:

I tested the if the rewritenegine works and... it works!

in the .htaccess file:
RewriteRule ^testurl$

and it worked


25 February 2010 at 12:49am Community Member, 4 Posts

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:

[Warning] mb_substr_count() expects at most 3 parameters, 4 given at line 304

wich content is

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

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


but the line with the mistake its actually

304- substr_count($pattern, '/', 0, $doubleSlashPoint) + 1;

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


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


25 February 2010 at 1:26am Community Member, 901 Posts

Maybe you don't have the multibyte string extension compiled into PHP? Could be that SilverStripe then uses the default string functions?


25 February 2010 at 2:30am Community Member, 4 Posts


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.


25 February 2010 at 3:28am Community Member, 901 Posts

I don't think there's a way to extend an existing php build without recompiling.

I suggest you get PHP, Apache and MySQL via your Package manager and configure PHP manually. Or look for a suitable pre-built package.


25 February 2010 at 11:26pm (Last edited: 25 February 2010 11:35pm), Forum Moderator, 921 Posts

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