(PHP 4, PHP 5, PHP 7, PHP 8)
base_convert — Convert a number between arbitrary bases
$num, int $from_base, int $to_base): string
Returns a string containing num
represented in base to_base. The base in
which num is given is specified in
from_base. Both
from_base and to_base
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.
num is interpreted case-insensitively.
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.
num
The number to convert. Any invalid characters in
num are silently ignored.
As of PHP 7.4.0 supplying any invalid characters is deprecated.
from_base
The base num is in
to_base
The base to convert num to
num converted to base to_base
| 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. |
Example #1 base_convert() example
<?php
$hexadecimal = 'a37334';
echo base_convert($hexadecimal, 16, 2);
?>
The above example will output:
101000110111001100110100