This code allows to get the IP address from which the user is viewing the…
By apphp-snippets
This checks if the referrer is from the site you expect it to be.
By Silvern88
Latest source code will always be here: http://code.google.com/p/isemail/source/browse/trunk
By dominicsayers
Great if you want to make sure an email ends in a certain extension.
A function that does a simple JPEG image validation
By steve
Is it a valid IP?
By fireshark
A simple email validator.
By vivei
Checks if a string is alphanumeric.
Validates the length of a string
A function that validates e-mail addresses with dns lookup and syntax check