I'm a noob but trying vigorously to simply validate email addresses that only end in ".edu" or ".ac" is there a simple function/script/solution to this seemingly simple problem? able to use php,javascript or jquery.
Any help would be great thanks in advance!
You want a regular expression.
The following pattern tests for any e-mail address ending in a top-level domain like .com, .org, .net, .biz etc.
[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*#(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+(?:[A-Z]{2}|com|org|net|gov|mil|biz|info|mobi|name|aero|jobs|museum)\b
You can use the preg_match function in PHP, pass this as the pattern, and just change the list of top-level domains you want to accept at the end. If the function returns 0, the address didn't validate, if it returns 1, it did match.
Regex source: http://www.regular-expressions.info/email.html
preg_match: http://php.net/manual/en/function.preg-match.php
jQuery also has a validate plugin with built-in patterns for validating e-mail addresses, but you'd need to combine this with the server-side validation in PHP for those people that have Javascript disabled.
Validate plugin: http://docs.jquery.com/Plugins/Validation/validate
if( strpos($_post['email'] , '.edu' ) == true){
....
}
NOTE: the 'name' in the input field of the email address should be 'email'
It is the most simple way out there to check if ".edu" is present in that email
Related
I want to validate email address and website in comment box. When someone writes comment in comment box and after submission check if email address or website found in comment remove that email and address.
I have put below regular expression for email.
"/(?:[a-z0-9!#$%&'*+=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+=?^_`{|}~-]+)*|\"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*\")#(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])/"
above expression validates email address but I want to validate like email[at]email[dot]com, email{at}email{dot}com, email(at)email(dot)com
Same for website validation I used below expression
"/((((http|https|ftp|ftps)\:\/\/)|www\.)[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,4}(\/\S*)?)/"
But I want to validate website like website[dot]com, www[dot]website[dot]com
Basically what you need to do is, where you have the validation of # and . character in email or . in weburl, you need to enhance your regex and put the alternatives to # character as you are expecting. So,
# should be written as (?:#|[[({]at[\]})])
And,
\. should be written as (?:\.|[[{(]dot[\]})])
wherever you have them in your regex and then it will also filter those strings as well.
Here is a modified regex for email.
(?:[a-z0-9!#$%&'*+=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+=?^_`{|}~-]+)*|\"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*\")(?:#|[[({]at[\]})])(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?(?:\.|[[{(]dot[\]})]))+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])
Regex Demo for email
Same way you can replace . from your website regex and your modified regex becomes this,
(?:(?:(?:http|https|ftp|ftps)\:\/\/)|www(?:\.|[[{(]dot[\]})]))(?:[a-zA-Z0-9.-]|[[{(]dot[\]})])+(?:\.|[[{(]dot[\]})])[a-zA-Z]{2,4}(\/\S*)?
Regex Demo for web url
Now besides matching of [dot], {dot} and (dot), the regex will also match [dot} and similar and as you are trying to detect such strings further, hence matching these strings will be an added advantage, rather than a problem unless the context was otherwise.
oh eh...ya...lots commented there are lots email validation can be used but just that for this one I have to do it like what is mentioned below that's why....
I need to validate email like this
alphanumeric characters followed by # followed by alphanumeric characters followed by . followed by 2 – 4 more alphanumeric characters
this is what I have done but somehow I know it's the last part after . I messed up but I couldn't find where I messed up....
preg_match("/^([0-9]|[a-z])([0-9]|[a-z]|[_-])*#([0-9]|[a-z])*\.([0-9][a-z]){2,4}$/i","")
at start I used [0-9]|[a-z])([0-9]|[a-z]|[_-] because I didn't want people able to use _- as the start....so forced start as number/letters only
There must be a million different people that wrote a new regex for email validation. If you are interested in the email format you can just use
$email = filter_var($email, FILTER_VALIDATE_EMAIL);
and if the final value is empty the initial one wasn't a valid email address format.
(as an extra step you could try to validate the domain by using this function http://php.net/manual/en/function.checkdnsrr.php)
Have a try with this:
^[0-9a-z_\-]+#[0-9a-z_\-]+\.[0-9a-z]{2,4}$
But as said: there are ready-to-use regexes, much better than trying to reinvent the wheel. Also this current approach does not macth all valid addresses and validates some addresses that are illegal.
Which reason of email validation? It is very upset when you try to enter you email and you can't due to the stupid validation. I think it is enoth to check the availability of '#' and '.' signs, in case user unintentionally missed this.
$res = preg_match("/#[^#\.]*\./", $str);
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Possible Duplicate:
How to validate an email in php5?
I have used the following code to ensure email addresses provided on signup are valid.
(!preg_match("/^( [a-zA-Z0-9] )+( [a-zA-Z0-9\._-] )*#( [a-zA-Z0-9_-] )+( [a-zA-Z0-9\._-] +)+$/" , $email))
I entered a standard email address such as
yourname#company.co.uk
and it is flagging up as being invalid.
Can anyone help me with why this may be happening?
Why not just use filter_var
var_dump(filter_var($email,FILTER_VALIDATE_EMAIL));
EDIT
if(filter_var($email,FILTER_VALIDATE_EMAIL) === false)
{
echo 'Email is not valid';
}
else
{
//do the stuff
}
Now can I ask you a question? What are those spaces doing in your regular expression? :-)
I'm pretty certain that spaces aren't actually valid in email addresses. And, even if they were, they wouldn't be required to be at specific positions relative to the separators (such as immediately before and after the # character).
Although I generally disagree with the use of regular expressions for email addresses (just send an email with a confirmation link - that solves your problem and then some a), you should at least use the right regular expression if you must do it that way.
a There are an untold number of perfectly valid email addresses that don't have an actual account behind them.
if you would like to use regex for matching emails, the following will match "sensible" addresses.
preg_match('/^([a-z0-9]+([_\.\-]{1}[a-z0-9]+)*){1}([#]){1}([a-z0-9]+([_\-]{1}[a-z0-9]+)*)+(([\.]{1}[a-z]{2,6}){0,3}){1}$/i', $email)
It's quite verbose but if you only want, like i said "sensible" addresses to pass - it does the job.
does get stuck on address like "example#somename.somewhere.com" because, after the # symbol it looks for anything following a period to only be only 2-6 characters in length.
"example#somename-somewhere.com" however would pass fine.
I don't recommend trying to use a single regex solution for the job unless, as in my case, you only want to allow "sensible" addresses.
There is quite a good article that covers "correctly" validating email addresses here: http://www.linuxjournal.com/article/9585
With the new domainless addresses that are planned to be released, paxdiablo's solution seems even better
$string ='"Test User" <test#test.com>,"Another" <another#test.com>,"aeer" <whateveryourmail#gmail.com>';
I've succeed splitting this become pair of name and email address with this code
preg_match_all('!"(.*?)"\s+<\s*(.*?)\s*>!', $string, $matches);
the problem is, I can't validate the email address,false email address will be match too.
How to filter only valid email and also splitting Name and email address?
You could use some of the available mail address parsers available, e.g.:
mailparse_rfc822_parse_addresses()
Mail_RFC822::parseAddressList()
Optionally, filter the output through filter_var() (or one of its permutations targeted at arrays) with the FILTER_VALIDATE_EMAIL.
E-mail address validation can be done in two ways: check for a # and a . and assume it's valid. Users know their e-mail address, it is not our business if they enter a wrong one. If you want to be certain you make a good e-mail address checker, then there is only one correct regex to use for validation: http://www.ex-parrot.com/pdw/Mail-RFC822-Address.html
What about jQuery?
http://plugins.jquery.com/project/jqueryvalidate
I have the following part of a validation script:
$invalidEmailError .= "<br/>» You did not enter a valid E-mail address";
$match = "/\b[A-Z0-9._%+-]+#[A-Z0-9.-]+\.[A-Z]{2,4}\b/";
That's the expression, here is the validation:
if ( !(preg_match($match,$email)) ) {
$errors .= $invalidEmailError; // checks validity of email
}
I think that's enough info, let me know if more is needed.
Basically, what happens is the message "You did not enter a valid E-mail address" gets echoed no matter what. Whether a correct email address or an incorrect email address is entered.
Does anyone have any idea or a clue as to why?
EDIT: I'm running this on localhost (using Apache), could that be the reason as to why the preg_match ain't working?
Thanks!
Amit
Your regex only includes [A-Z], not [a-z]. Try
$match = "/\b[A-Z0-9._%+-]+#[A-Z0-9.-]+\.[A-Z]{2,4}\b/i";
to make the regex case-insensitive.
You can test this live on http://regexpal.com.
However, I'd advise you to try one of the expressions on the page mentioned by strager: http://fightingforalostcause.net/misc/2006/compare-email-regex.php. They have been perfected over time and will probably behave better. But Gmail users will be satisfied with yours, since they'll be able to use plus aliases which are rejected incorrectly by many validators.
You likely got the regular expression you're using from regular-expressions.info. On that page, the author states (emphasis added):
If you want to use the regular expression above, there's two things you need to understand. First, long regexes make it difficult to nicely format paragraphs. So I didn't include a-z in any of the three character classes. This regex is intended to be used with your regex engine's "case insensitive" option turned on. (You'd be surprised how many "bug" reports I get about that.) Second, the above regex is delimited with word boundaries, which makes it suitable for extracting email addresses from files or larger blocks of text. If you want to check whether the user typed in a valid email address, replace the word boundaries with start-of-string and end-of-string anchors, like this: ^[A-Z0-9._%+-]+#[A-Z0-9.-]+.[A-Z]{2,4}$.
To solve this problem, add the i PCRE flag after your regular expression.
You can always try debugging your regex using a simpler tool (I'm quite fond of using Notepad++ for this purpose) and performing iterative tests - ie. making the expression more/less complicated and seeing if that fixes/breaks things.