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Tue. Sep. 4th, 2007 10:24 PM 
This is a simple function to check if an email is valid or not.
2
The following script is a single interface for pre-validating any HTML form. It lets you validate your form data the way you want, while handling the rudimentary tasks itself.
1) Change just one variable to make it work with $_GET or $_POST or $_REQUEST.
2) Name which elements are 'required' all at once in a hidden HTML text input.
3) Easily provide field descriptions in hidden HTML text inputs that you can use to print error statements.
4) Call a single function to print out error statements that you can easily style with CSS.
5) It automatically checks if fields marked 'required' have been filled out.
Most of the pre-validation code is from PHP 5: Unleashed by Sams Publishing. I found it extremely useful for a recent project. Sharing it here, I removed some unnecessary functions, and tried to simplify some points.
All the comments are my own; hopefully I provided more than enough explanation.
1) Change just one variable to make it work with $_GET or $_POST or $_REQUEST.
2) Name which elements are 'required' all at once in a hidden HTML text input.
3) Easily provide field descriptions in hidden HTML text inputs that you can use to print error statements.
4) Call a single function to print out error statements that you can easily style with CSS.
5) It automatically checks if fields marked 'required' have been filled out.
Most of the pre-validation code is from PHP 5: Unleashed by Sams Publishing. I found it extremely useful for a recent project. Sharing it here, I removed some unnecessary functions, and tried to simplify some points.
All the comments are my own; hopefully I provided more than enough explanation.
6
PHP function to validate an email address.
5
Simple function to check for a valid email address. Makes sure the @ and a . are in the right place. There is most likely a perl package on CPAN that would be more extensive, but this happens to work for my uses.
7
So... this is a simple and great way for validate email address using regular expressions. happy programming!
9
Fixed the regular expression to check for more strict requirements.
12
Another solution recommends using a text match pattern.
This works, but as long as you've got mail.jar in your classpath anyway, you might as well use this technique instead. (Plus, I think it works with older JDK 1.2+, whereas pattern.compile is 1.4+)
Note that it also accepts a comma-separated list of emails, just like a To: or CC: address line would.
This works, but as long as you've got mail.jar in your classpath anyway, you might as well use this technique instead. (Plus, I think it works with older JDK 1.2+, whereas pattern.compile is 1.4+)
Note that it also accepts a comma-separated list of emails, just like a To: or CC: address line would.
8
Fixed missing $ sign.
6
Validate Email Address
-7
Validate Email Address
