Re: code snippet to verify email addresses

Hmm, this one is not nearly complete as far as syntax checking goes. It looks like it splits by "@", makes sure there are two parts, then checks if the domain portion is valid and that the MX host responds. Many syntactially invalid e-mail addresses would pass right through this test, such as "......@microsoft.com" Monte Jeff Wilhelm wrote: > > i ran across one a while ago that was very complete... i think i have it > here somewhere.... yep. here it is: > > <? > function MailVal($Addr, $Level, $Timeout = 15000) { > > // Valid Top-Level Domains > $gTLDs = "com:net:org:edu:gov:mil:int:arpa:"; > $CCs = > "ad:ae:af:ag:ai:al:am:an:ao:aq:ar:as:at:au:aw:az:ba:bb:bd:be:bf:". > > "bg:bh:bi:bj:bm:bn:bo:br:bs:bt:bv:bw:by:bz:ca:cc:cf:cd:cg:ch:ci:". > > "ck:cl:cm:cn:co:cr:cs:cu:cv:cx:cy:cz:de:dj:dk:dm:do:dz:ec:ee:eg:". > > "eh:er:es:et:fi:fj:fk:fm:fo:fr:fx:ga:gb:gd:ge:gf:gh:gi:gl:gm:gn:". > > "gp:gq:gr:gs:gt:gu:gw:gy:hk:hm:hn:hr:ht:hu:id:ie:il:in:io:iq:ir:". > > "is:it:jm:jo:jp:ke:kg:kh:ki:km:kn:kp:kr:kw:ky:kz:la:lb:lc:li:lk:". > > "lr:ls:lt:lu:lv:ly:ma:mc:md:mg:mh:mk:ml:mm:mn:mo:mp:mq:mr:ms:mt:". > > "mu:mv:mw:mx:my:mz:na:nc:ne:nf:ng:ni:nl:no:np:nr:nt:nu:nz:om:pa:". > > "pe:pf:pg:ph:pk:pl:pm:pn:pr:pt:pw:py:qa:re:ro:ru:rw:sa:sb:sc:sd:". > > "se:sg:sh:si:sj:sk:sl:sm:sn:so:sr:st:su:sv:sy:sz:tc:td:tf:tg:th:". > > "tj:tk:tm:tn:to:tp:tr:tt:tv:tw:tz:ua:ug:uk:um:us:uy:uz:va:vc:ve:". > "vg:vi:vn:vu:wf:ws:ye:yt:yu:za:zm:zr:zw:"; > > // The countries can have their own 'TLDs', e.g. mydomain.com.au > $cTLDs = "com:net:org:edu:gov:mil:co:ne:or:ed:go:mi:"; > > $fail = 0; > > // Shift the address to lowercase to simplify checking > $Addr = strtolower($Addr); > > // Split the Address into user and domain parts > $UD = explode("@", $Addr); > if (sizeof($UD) != 2) $fail = 1; > > // Split the domain part into its Levels > $Levels = explode(".", $UD[1]); $sLevels = sizeof($Levels); > if ($sLevels < 2) $fail = 1; > > // Get the TLD, strip off trailing ] } ) > and check the length > $tld = $Levels[$sLevels-1]; > $tld = ereg_replace("[>)}]$|]$", "", $tld); > if (strlen($tld) < 2 || strlen($tld) > 3 && $tld != "arpa") $fail = > 1; > > $Level--; > > // If the string after the last dot isn't in the generic TLDs or country > codes, it's invalid. > if ($Level && !$fail) { > $Level--; > if (!ereg($tld.":", $gTLDs) && !ereg($tld.":", $CCs)) $fail = > 2; > } > > // If it's a country code, check for a country TLD; add on the domain name. > if ($Level && !$fail) { > $cd = $sLevels - 2; $domain = $Levels[$cd].".".$tld; > if (ereg($Levels[$cd].":", $cTLDs)) { $cd--; $domain = > $Levels[$cd].".".$domain; } > } > > // See if there's an MX record for the domain > if ($Level && !$fail) { > $Level--; > if (!getmxrr($domain, $mxhosts, $weight)) $fail = 3; > } > > // Attempt to connect to port 25 on an MX host > if ($Level && !$fail) { > $Level--; > while (!$sh && list($nul, $mxhost) = each($mxhosts)) > $sh = fsockopen($mxhost, 25); > if (!$sh) $fail = 4; > } > > // See if anyone answers > if ($Level && !$fail) { > $Level--; > set_socket_blocking($sh, false); > $out = ""; $t = 0; > while ($t++ < $Timeout && !$out) > $out = fgets($sh, 256); > if (!ereg("^220", $out)) $fail = 5; > } > > if ($sh) fclose($sh); > > return $fail; > } //MailVal > ?> > > ----- Original Message ----- > From: "Eric Wood" <eric@interplas.com> > To: <php-general@lists.php.net> > Sent: Monday, July 17, 2000 2:37 PM > Subject: [PHP] code snippet to verify email addresses > > > Anyone have a code snippet they would give me to verify that an email > > address is syntactically correct? > > > > Thanks, > > -Eric Wood > > > > > > > > > > -- > > PHP General Mailing List (http://www.php.net/) > > To unsubscribe, e-mail: php-general-unsubscribe@lists.php.net > > For additional commands, e-mail: php-general-help@lists.php.net > > To contact the list administrators, e-mail: php-list-admin@lists.php.net > > > > > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, e-mail: php-general-unsubscribe@lists.php.net > For additional commands, e-mail: php-general-help@lists.php.net > To contact the list administrators, e-mail: php-list-admin@lists.php.net -- Monte Ohrt <monte@ispi.net> http://www.ispi.net/