This checks if the referrer is from the site you expect it to be.
Recursively looks for a file in directories in the current a top-level from the calling…
Great if you want to make sure an email ends in a certain extension.
A handy utility for uploading files
Cleans a URL string, for SEO friendly links
Calculates and returns the mode of the numbers given
Returns the average of the numbers given.
Returns the median of the numbers given
for all your a^2 b^2 = c^2 needs.
Generates a random key, a-Z 0-9 with no max length