base_convert

(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 meaning 11 and z meaning 35. The case of the letters doesn't matter, i.e. number is interpreted case-insensitively.

Parameters:

number

The number to convert

frombase

The base number is in

tobase

The base to convert number to

Returns:

number converted to base tobase

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.

Examples:

base_convert() example

<?php
$hexadecimal = 'a37334';
echo base_convert($hexadecimal, 16, 2);
?>

The above example will output:

101000110111001100110100