<?php $domain_name = "ελληνικά.idn.icann.org"; $domain_name = idn_to_ascii($domain_name); function isValidDomainName($domain_name) { return (preg_match("#^([\w-]+://?|www[\.])?[a-z0-9]+[a-z0-9\-\.]*[a-z0-9]+\.[a-z]{2,7}$#", $domain_name) //valid chars check && preg_match("/^.{1,253}$/", $domain_name) //overall length check && preg_match("/^[^\.]{1,63}(\.[^\.]{1,63})*$/", $domain_name) ); //length of each label } echo isValidDomainName($domain_name) ? "Domain is valid." : "Domain is not valid."; ?>
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