validate domain name (regex)

^(?!\-)(?:[a-zA-Z\d\-]{0,62}[a-zA-Z\d]\.){1,126}(?!\d+)[a-zA-Z\d]{1,63}$


// http://php.net/manual/en/function.parse-url.php

//     $tlds = "/^[-a-z0-9]{1,63}\.(ac\.nz|co\.nz|geek\.nz|gen\.nz|kiwi\.nz|maori\.nz|net\.nz|org\.nz|school\.nz|ae|ae\.org|com\.af|asia|asn\.au|auz\.info|auz\.net|com\.au|id\.au|net\.au|org\.au|auz\.biz|az|com\.az|int\.az|net\.az|org\.az|pp\.az|biz\.fj|com\.fj|info\.fj|name\.fj|net\.fj|org\.fj|pro\.fj|or\.id|biz\.id|co\.id|my\.id|web\.id|biz\.ki|com\.ki|info\.ki|ki|mobi\.ki|net\.ki|org\.ki|phone\.ki|biz\.pk|com\.pk|net\.pk|org\.pk|pk|web\.pk|cc|cn|com\.cn|net\.cn|org\.cn|co\.in|firm\.in|gen\.in|in|in\.net|ind\.in|net\.in|org\.in|co\.ir|ir|co\.jp|jp|jp\.net|ne\.jp|or\.jp|co\.kr|kr|ne\.kr|or\.kr|co\.th|in\.th|com\.bd|com\.hk|hk|idv\.hk|org\.hk|com\.jo|jo|com\.kz|kz|org\.kz|com\.lk|lk|org\.lk|com\.my|my|com\.nf|info\.nf|net\.nf|nf|web\.nf|com\.ph|ph|com\.ps|net\.ps|org\.ps|ps|com\.sa|com\.sb|net\.sb|org\.sb|com\.sg|edu\.sg|org\.sg|per\.sg|sg|com\.tw|tw|com\.vn|net\.vn|org\.vn|vn|cx|fm|io|la|mn|nu|qa|tk|tl|tm|to|tv|ws|academy|careers|education|training|bike|biz|cat|co|com|info|me|mobi|name|net|org|pro|tel|travel|xxx|blackfriday|clothing|diamonds|shoes|tattoo|voyage|build|builders|construction|contractors|equipment|glass|lighting|plumbing|repair|solutions|buzz|sexy|singles|support|cab|limo|camera|camp|gallery|graphics|guitars|hiphop|photo|photography|photos|pics|center|florist|institute|christmas|coffee|kitchen|menu|recipes|company|enterprises|holdings|management|ventures|computer|systems|technology|directory|guru|tips|wiki|domains|link|estate|international|land|onl|pw|today|ac\.im|co\.im|com\.im|im|ltd\.co\.im|net\.im|org\.im|plc\.co\.im|am|at|co\.at|or\.at|ba|be|bg|biz\.pl|com\.pl|info\.pl|net\.pl|org\.pl|pl|biz\.tr|com\.tr|info\.tr|tv\.tr|web\.tr|by|ch|co\.ee|ee|co\.gg|gg|co\.gl|com\.gl|co\.hu|hu|co\.il|org\.il|co\.je|je|co\.nl|nl|co\.no|no|co\.rs|in\.rs|rs|co\.uk|org\.uk|uk\.net|com\.de|de|com\.es|es|nom\.es|org\.es|com\.gr|gr|com\.hr|com\.mk|mk|com\.mt|net\.mt|org\.mt|com\.pt|pt|com\.ro|ro|com\.ru|net\.ru|ru|su|com\.ua|ua|cz|dk|eu|fi|fr|pm|re|tf|wf|yt|gb\.net|ie|is|it|li|lt|lu|lv|md|mp|se|se\.net|si|sk|ac|ag|co\.ag|com\.ag|net\.ag|nom\.ag|org\.ag|ai|com\.ai|com\.ar|as|biz\.pr|com\.pr|net\.pr|org\.pr|pr|biz\.tt|co\.tt|com\.tt|tt|bo|com\.bo|com\.br|net\.br|tv\.br|bs|com\.bs|bz|co\.bz|com\.bz|net\.bz|org\.bz|ca|cl|co\.cr|cr|co\.dm|dm|co\.gy|com\.gy|gy|co\.lc|com\.lc|lc|co\.ms|com\.ms|ms|org\.ms|co\.ni|com\.ni|co\.ve|com\.ve|co\.vi|com\.vi|com\.co|net\.co|nom\.co|com\.cu|cu|com\.do|do|com\.ec|ec|info\.ec|net\.ec|com\.gt|gt|com\.hn|hn|com\.ht|ht|net\.ht|org\.ht|com\.jm|com\.kn|kn|com\.mx|mx|com\.pa|com\.pe|pe|com\.py|com\.sv|com\.uy|uy|com\.vc|net\.vc|org\.vc|vc|gd|gs|north\.am|south\.am|us|us\.org|sx|tc|vg|cd|cg|cm|co\.cm|com\.cm|net\.cm|co\.ke|or\.ke|co\.mg|com\.mg|mg|net\.mg|org\.mg|co\.mw|com\.mw|coop\.mw|mw|co\.na|com\.na|na|org\.na|co\.ug|ug|co\.za|com\.ly|ly|com\.ng|ng|com\.sc|sc|mu|rw|sh|so|st|club|kiwi|uno|email|ruhr)$/i";