(PHP 4, PHP 5, PHP 7)
Convert a number between arbitrary bases
string base_convert ( string $number, int $frombase, int $tobase )
Returns a string containing number represented in base tobase. The base in which number is given is specified in frombase. Both frombase and tobase have to be between 2 and 36, inclusive. Digits in numbers with a base higher than 10 will be represented with the letters a-z, with a meaning 10, b me