decbin

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

decbin — 十進(jìn)制轉(zhuǎn)換為二進(jìn)制

說明

decbin(int $number): string

返回一字符串，包含有給定 number 參數(shù)的二進(jìn)制表示。所能轉(zhuǎn)換的最大數(shù)值為十進(jìn)制的 4294967295，其結(jié)果為 32 個 1 的字符串。

參數(shù)

number

Decimal value to convert

Range of inputs on 32-bit machines
positive number negative number return value
0   0
1   1
2   10
... normal progression ...
2147483646   1111111111111111111111111111110
2147483647 (largest signed integer)   1111111111111111111111111111111 (31 1's)
2147483648 -2147483648 10000000000000000000000000000000
... normal progression ...
4294967294 -2 11111111111111111111111111111110
4294967295 (largest unsigned integer) -1 11111111111111111111111111111111 (32 1's)
Range of inputs on 64-bit machines
positive number negative number return value
0   0
1   1
2   10
... normal progression ...
9223372036854775806   111111111111111111111111111111111111111111111111111111111111110
9223372036854775807 (largest signed integer)   111111111111111111111111111111111111111111111111111111111111111 (63 1's)
  -9223372036854775808 1000000000000000000000000000000000000000000000000000000000000000
... normal progression ...
  -2 1111111111111111111111111111111111111111111111111111111111111110
  -1 1111111111111111111111111111111111111111111111111111111111111111 (64 1's)

返回值

Binary string representation of number

范例

示例 #1 decbin() 例子

<?php
echo decbin(12) . "\n";
echo decbin(26);
?>

以上例程會輸出：

1100
11010

參見

  • bindec() - 二進(jìn)制轉(zhuǎn)換為十進(jìn)制
  • decoct() - 十進(jìn)制轉(zhuǎn)換為八進(jìn)制
  • dechex() - 十進(jìn)制轉(zhuǎn)換為十六進(jìn)制
  • base_convert() - 在任意進(jìn)制之間轉(zhuǎn)換數(shù)字
  • printf() - 輸出格式化字符串, using %b, %032b or %064b as the format
  • sprintf(), using %b, %032b or %064b as the format