Php/docs/function.base-convert
base_convert
(PHP 4, PHP 5, PHP 7)
base_convert — Convert a number between arbitrary bases
Description
base_convert
( string $number
, int $frombase
, int $tobase
) : string
Returns a string containing number
represented in base tobase. The base in
which number is given is specified in
frombase. Both
frombase and tobase
have to be between 2 and 36, inclusive. Digits in numbers with a
base higher than 10 will be represented with the letters a-z,
with a meaning 10, b meaning 11 and z meaning 35.
The case of the letters doesn't matter, i.e.
number is interpreted case-insensitively.
Warning base_convert() may lose precision on large numbers due to properties related to the internal "double" or "float" type used. Please see the Floating point numbers section in the manual for more specific information and limitations.
Parameters
number- The number to convert. Any invalid characters in
numberare silently ignored. As of PHP 7.4.0 supplying any invalid characters is deprecated. frombase- The base
numberis in tobase- The base to convert
numberto
Return Values
number converted to base tobase
Changelog
| Version | Description |
|---|---|
| 7.4.0 | Passing invalid characters will now generate a deprecation notice.
The result will still be computed as if the invalid characters did not exist. |
Examples
Example #1 base_convert() example
<?php$hexadecimal = 'a37334';echo base_convert($hexadecimal, 16, 2);?>
The above example will output:
101000110111001100110100
