base_convert

(PHP 4, PHP 5, PHP 7, PHP 8)

base_convertConvert a number between arbitrary bases

Опис

base_convert(string $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.

Увага

base_convert() may lose precision on large numbers due to properties related to the internal float type used. Please see the Floating point numbers section in the manual for more specific information and limitations.

Параметри

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

Значення, що повертаються

num converted to base to_base

Журнал змін

Версія Опис
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.

Приклади

Приклад #1 base_convert() example

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

Поданий вище приклад виведе:

101000110111001100110100

Прогляньте також

  • intval() - Отримує цілочисельне значення змінної