(PHP 4, PHP 5, PHP 7)
base_convert — Convert a number between arbitrary bases
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
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.
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.
The number to convert. Any invalid characters in
number are silently ignored. As of PHP 7.4.0 supplying any invalid characters is deprecated.
number is in
The base to convert
number converted to base
|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:
© 1997–2020 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.