This function will extract the file extension from a string that represents a filename. It retrieves the characters after the last dot and returns them as a new string.

Show a 0 to 5 floating point rating in graphic stars using a PHP function. You can specify which direction to align the graphic stars (left or right)

A function that will strip all the unsafe characters from a string in order to make it valid for URLs. This can be especially useful when you create your own URLs dynamically using mod_rewrite.

Reconstruct an URL in PHP by concatenating the domain-name, path and query string from three different variables.

Convert a JPEG to a grayscale JPEG using PHP and the IMG_FILTER_GRAYSCALE type of filter.

A function that generates an array of hex colors that forms a gradient, starting from a hex color and ending with another hex color. The number of gradient steps can also be defined.

Using a line of code at the beginning of the file and a function call at the end, you can count the number of milliseconds it took PHP to load the page.

How to emulate the insecure, deprecated register_globals flag so that you can access GET and POST keys as PHP variables.

A very basic hit counter in PHP; it uses a text file to store the number of hits and displays the number of current hits.