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kgaughan/Checking if a hostname is well-formed.

Created December 1, 2008 18:17
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Checking if a hostname is well-formed.
function is_well_formed_hostname($host) {
return preg_match('~^(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)*[a-z](?:[a-z0-9-]*[a-z0-9])$~', $host);
}
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