Regular expression for validating email address

10-Jul-2016 09:49 by 10 Comments

Regular expression for validating email address - stockholm supper club speed dating

A lot of websites now require registration, meaning that users need to be assigned a username and password.

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After all it's only the browser display being obfuscated and not the data transfer.Remember that, as Java Script isn't available in all browsers, you should also use server-side scripting to validate all data before recording it in a database or elsewhere.You might also want to spice up your forms using HTML5 Form Validation as we've done further down the page.One popular approach is to install Fail2Ban to monitor log files and lock out repeat offendors.Of course that only works if your login system reports failed login attempts to a system log file.If the purpose of registration is to confirm that the person exists, and that they have supplied a valid email address, then as part of the registration processe you a should either email them a random password or a confirmation token rather than letting them choose their own password and use it immediately.

The code presented below would then be used for letting the user change their password.

Because the input type obscures the text typed, you should let the user confirm that they haven't made a mistake.

The simplest way to do this is to have the password entered twice, and then check that they are identical.

In most browsers - those that support Java Script 1.5 (Firefox, Chrome, Safari, Opera 7 and Internet Explorer 8 and higher) - you can use more powerful regular expressions. The code presented above is fine in that it checks everything that we wanted to check, but uses a lot of code to test each requirement individually and present different error messages.

We're going to show you now how to apply the password tests using a single regular expression.

Another method is to display what they've entered as part of a 'confirmation page'.