Because IXWebHosting presents several IPs to us. I used one of the delicated IPs to parse unlimited sub domains' homepage and some inner pages (The different main domains and sub domains, used the same space, integrated them together); another delicated IP, used it to parse many domains' pan-domain. Finally, yesterday I merge the web pages of these 2 delicated IPs, via a judgment sentence, use a delicated IP to realise that many sub domains of different domains' resolution, and pan-domain resolution. After the tests of local and server, the program ran normally.

So it saved a delicated IP, from now on if I change the provider of hosting, I may just buy a delicated IP, and need not buy 2 delicated IPs. My approach is that the sub domains and pan-domains point to this delicated IP, the control panel of site need not any setting, at the root directory of the corresponding space of this delicated IP, create a index.php file, use this PHP file to read the Address Bar, then use the include() function to include the homepage file of the corresponding sub domain or pan-domain. The prior order of include() is that judge whether the homepage file exists, if exists, it will include the homepage file of sub domain; if does not exist, it will include the homepage file of pan-domain.

All of the inner pages of this delicated IP, just can use the 404 Error of .htaccess to realise. Create a .htaccess file at the root directory of this delicated IP's space, let the 404 error point to the auf.php. As the same steps above, the error page auf.php also write the judgment sentence, use the include() function to include the inner page of the corresponding sub domain or pan-domain, the prior order and judgement method are same with above.

Employ this delicated IP to create many sites, such as the resolution of sub domain or pan-domain, these many sites are integrated together, can not realise all kinds of function as the delicated site. If need realise the functions of delicated site, you may use other approach, such as submit the functions to the delicated site to run, or create a sub domain or pan-domain on this delicated IP, make it can perform the corresponding function.

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