Validating email in php

$date_regex = '%\A(0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])[- /.](19|20)\d\d\z%'; $test_date = '03/22/2010'; if (preg_match($date_regex, $test_date,$_POST['birthday']) ==true) { $errors[] = 'user name most have no spaces';` You are right, but in my case I'm only validating if moderator didn't make literal mistake in date format which is going directly to database instead of logical sense of given date. Furthemore, Chrome display simple additional interface. If you don't write anything in input or write it in bad format (correctly is following: '1919-12-23'), you will get the first statement. If you want in regex, try this, this will validate for, 01/01/1900 through 12/31/2099 Matches invalid dates such as February 31st Accepts dashes, spaces, forward slashes and dots as date separators $dt = '6/26/1970' ; // or // '6.26.1970' ; $dt = preg_replace("([.] )", "/", $dt); $test_arr = explode('/', $dt); if (checkdate($test_arr[0], $test_arr[1], $test_arr[2]) && preg_match("/[0-9]\/[0-9]\/[0-9]/", $dt)) else I tested it on Google Chrome and IE, everything works correctly.

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~ characters are legal in the local part of an e-mail address but in the above regular expression those characters are filtered out. It begins with at least one or more word characters including the underscore, equivalent to [A-Za-z0-9_].

[email protected](16) "[email protected]" This feature is only available for PHP Versions (PHP 5 Rejection of so-called partial domains because of "missing" dot is not following section 2.3.5 of RFC 5321.

It says FQDNs are permitted, and com, org, or va are (well, may be) valids FQDNs. Some TDLs (although few of them) have MX RRs, the for example "[email protected]" is correct.

Michael's regex considers [email protected] a valid address * which conflicts with section 2.3.5 of RFC 5321 which states that: * * Only resolvable, fully-qualified domain names (FQDNs) are permitted * when domain names are used in SMTP.

In other words, names that can * be resolved to MX RRs or address (i.e., A or AAAA) RRs (as discussed * in Section 5) are permitted, as are CNAME RRs whose targets can be * resolved, in turn, to MX or address RRs.

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