decbin
(PHP 4, PHP 5, PHP 7)
decbin — 十进制转换为二进制
说明
decbin
( int
$number
) : string
返回一字符串,包含有给定
number
参数的二进制表示。所能转换的最大数值为十进制的
4294967295,其结果为 32 个 1 的字符串。
参数
-
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
Example #1 decbin() 例子
<?php
echo decbin(12) . "\n";
echo decbin(26);
?>
以上例程会输出:
1100 11010