README

A PHP Class used to check if a domain has been registered.

Created to be fast and easy to use, modify and redistribute as you wish, credit me if appropriate.

How to install

1. Download DomainAvailability.php
2. Place it in your project folder (I prefer to put it in /lib).
3. include it in your PHP file, look at example.php or the code below.

Usage:

<?php
include ('DomainAvailability.php');  
$Domain = new DomainAvailability();
$available = $Domain->is_available("helgesverre.com");

if ($available) {
    echo "The domain is not registered";
} else {
    echo "The domain is registered";
}
?>

To enable full error reporting (E_ALL) when developing/debugging pass true as the only parameter when you are creating a new class instance like so:

$Domain = new DomainAvailability(true);

or look at example.php for an example.

Notes

The WHOIS server array is incomplete and some data is missing, the most popular TLD's are working though, I will update these as I can, I suggest making your own array of whois server information so you know which TLD is available, for a full list of TLD's and WHOIS servers please go to the IANA website

Supported Domain Extensions

These are the domain extensions that are supported by this script.

.com, .net, .org, .co.uk, .io, .computer, .ac, .academy, .actor, .ae, .aero, .af, .ag, 
.agency, .ai, .am, .archi, .arpa, .as, .asia, .associates, .at, .au, .aw, .ax, .az, .bar, 
.bargains, .be, .berlin, .bg, .bi, .bike, .biz, .bj, .blackfriday, .bn, .boutique, .build, 
.builders, .bw, .by, .ca, .cab, .camera, .camp, .captial, .cards, .careers, .cat, .catering, 
.cc, .center, .ceo, .cf, .ch, .cheap, .christmas, .ci, .cl, .cleaning, .clothing, .club, 
.cn, .co, .codes, .coffee, .college, .cologne, .community, .company, .construction, 
.contractors, .cooking, .cool, .coop, .country, .cruises, .cx, .cz, .dating, .de, 
.democrat, .desi, .diamonds, .directory, .dk, .dm, .domains, .dz, .ec, .edu, .education,
.ee, .email, .engineering, .enterprises, .equipment, .es, .estate, .eu, .eus, .events,
.expert, .exposed, .farm, .feedback, .fi, .fish, .fishing, .flights, .florist, .fo, 
.foo, .foundation, .fr, .frogans, .futbol, .ga, .gal, .gd, .gg, .gi, .gift, .gl, .glass,
.gop, .gov, .graphics, .gripe, .gs, .guitars, .guru, .gy, .haus, .hk, .hn, .holiday, 
.horse, .house, .hr, .ht, .hu, .id, .ie, .il, .im, .immobilien, .in, .industries, 
.institute, .int, .international, .iq, .ir, .is, .it, .je, .jobs, .jp, .kaufen, .ke, 
.kg, .ki, .kitchen, .kiwi, .koeln, .kr, .kz, .la, .land, .lease, .li, .lighting, .limo, 
.link, .london, .lt, .lu, .luxury, .lv, .ly, .ma, .management, .mango, .marketing, .md,
.me, .media, .menu, .mg, .miami, .mk, .ml, .mn, .mo, .mobi, .moda, .monash, .mp, .ms,
.mu, .museum, .mx, .my, .na, .name, .nc, .nf, .ng, .ninja, .nl, .no, .nu, .nz, .om, 
.onl, .paris, .partners, .parts, .pe, .pf, .photo, .photography, .photos, .pics, 
.pictures, .pl, .plumbing, .pm, .post, .pr, .pro, .productions, .properties, .pt, 
.pub, .pw, .qa, .quebec, .re, .recipes, .reisen, .rentals, .repair, .report, .rest, 
.reviews, .rich, .ro, .rocks, .rodeo, .rs, .ru, .ruhr, .sa, .saarland, .sb, .sc, .se,
.services, .sexy, .sg, .sh, .shoes, .si, .singles, .sk, .sm, .sn, .so, .social, .solar, 
.solutions, .soy, .st, .su, .supplies, .supply, .support, .sx, .sy, .systems, .tattoo, 
.tc, .technology, .tel, .tf, .th, .tienda, .tips, .tk, .tl, .tm, .tn, .to, .today, 
.tools, .town, .toys, .tr, .training, .travel, .tv, .tw, .tz, .ua, .ug, .uk, .university, 
.us, .uy, .black, .blue, .info, .kim, .pink, .red, .shiksha, .uz, .vacations, .vc, .ve,
.vegas, .ventures, .vg, .viajes, .villas, .vision, .vodka, .voting, .voyage, .vu, .wang,
.watch, .wed, .wf, .wien, .wiki, .works, .ws, .xxx, .xyz, .yt, .zm, .zone, 

Missing Domain Extensions

Due to the fact that a lot of the domain extentions listed on the IANA website, does not contain any information one which WHOIS server to use when querying for the domain information, the following domain extensions are not available (yet):

.dj, .do, .eg, .eh, .er, .et, .fj, .fk, .fm, .gallery, .gb, .ge, .gf, .gh, .gm, .gn, .gp,
.gq, .gr, .gt, .gu, .gw, .hm, .jetzt, .jm, .jo, .kh, .km, .kn, .kp, .kred, .kw, .ky, .lb, 
.lk, .lr, .ls, .mc, .mf, .mh, .mil, .mm, .moe, .mq, .mr, .mt, .mv, .mw, .mz, .nagoya, .ne, 
.neustar, .ni, .np, .nr, .nyc, .okinawa, .pa, .pg, .ph, .pk, .pn, .ps, .py, .qpon, .ren, 
.rw, .sd, .sj, .sl, .sohu, .sr, .ss, .sv, .sz, .td, .tg, .tj, .tokyo, .tp, .trade, .tt, 
.um, .uno, .va, .vi, .vi, .vn, .webcam, .ye, .yokohoma, .za, .ryukyu, .meet, .vote, .lc, 
.voto, .wed, .zw

If you know the whois server for any of these please feel free to create an issue with an update.

License

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

Code and research by Helge Sverre