(PHP 3 >= 3.0.6, PHP 4, PHP 5)
base_convert -- Convert a number between arbitrary bases
Description
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 meaning 11 and z meaning 35.
     
Example 1. base_convert() example 
<?php $hexadecimal = 'A37334'; echo base_convert($hexadecimal, 16, 2); ?>
 |  
 
       Outputs:
        | 
    | Warning | 
      base_convert() may lose precision on large numbers
      due to properties related to the internal "double" or "float" type used.
      Please see the Floating point numbers
      section in the manual for more specific information and limitations.
       | 
     See also: intval().