why use magic method __toString() if php return varibale data type?

here is the error message ... must return a string value ... just means the return value of __toString() has to be a value of data type string. If $users_class in your example is not intended to be a string value, it has be to converted to a string before returning it.

But when reading the above example, it seems to me that the var $users_class may just not have been initialized yet. In this case change the method __toString() to :

public function __toString() {
    if(is_null($this->users_class)) {
        return 'NULL';
    }
    return $this->user_class;
}

To make the above code working, you'll need to make a change in the smarty code too. Remove the double quotes around the value of the value= attribute.

Creating Wildcard Sub Domain Using Apache VirtualHost for php

up vote4down voteaccepted

You can't make dynamic subdomains with .htacces You will need to configure the apache virtual host to accept requests for multiple domains See the Apache documentation - Using Name Based Virtual Hosts <VirtualHost *:80> ServerName www.example.com ServerAlias example.com *.example.com DocumentRoot /www/domain </VirtualHost> Adding the wildcard subdomain *.example.com, your PHP application will receive all requests for any domain below example.com, ie garbage.example.com, busted.example.com, llama.example.com, etc. Creating Wildcard Sub Domain Using Apache VirtualHost Multiple Domains to One Virtual Host | Wildcard Host (shared hosting)? Apache default virtual host for multiple domains At this point, your application will have to determine the validity of the subdomain and display the appropriate error for unknown subs. From there, parse the domain for mike.

2down voteaccepted

Wildcard sub-domains are definitely possible using Apache virtual hosts. I had basically the same requirements and managed to get it working with Apache's mod_vhost_alias.somodule. Try this in your http-vhosts.conf file: DocumentRoot "/home/admin1/public_html/userweb/" <Directory "/home/admin1/public_html/userweb/"> Options None AllowOverride None Order allow,deny Allow from all </Directory> <VirtualHost *:80> DocumentRoot /home/admin1/public_html/ ServerName www.example.com </VirtualHost> <VirtualHost *:80> VirtualDocumentRoot /home/admin1/public_html/userweb/%1.example.com/ </VirtualHost> <VirtualHost *:80> DocumentRoot /home/admin1/public_html/ ServerName example.com </VirtualHost> Note that I haven't tested this, but it's pretty close to the solution that worked for me. Full details of my solution are here: http://www.calcatraz.com/blog/wildcard-subdomains-in-apache-1422