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  Tutorial: PHP Email Systems E-mail Validation with PHP Tutorial

This tutorial will show you how to check to see if an E-mail address is valid.

Tutorial Details:

PHP Email Systems E-mail Validation with PHP Tutorial
When you register on at a website, the site normally checks if the e-mail address that you enter is in a valid format. This is done by using what called a Regular Expression. What we need to do is check if a string (eg $email) matches the regular expression:
ereg("^[a-zA-Z0-9_]+@[a-zA-Z0-9\-]+\.[a-zA-Z0-9\-\.]+$]", $email); At the moment that only checks the string ($email), but does not does not output anything.So next we need to write an IF statement that returns a boolean value, if the string does not match the regular expressions.

if (eregi("^[a-zA-Z0-9_]+@[a-zA-Z0-9\-]+\.[a-zA-Z0-9\-\.]+$]", $email))
{
return FALSE;
}
That is the basic validation bit, but now we can do even more validation. What we will do next is check the domain name after the @ is a real domain name.


 

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PHP Email Systems E-mail Validation with PHP Tutorial

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