decbin
(PHP 4, PHP 5, PHP 7, PHP 8)
decbin — 十進制轉換為二進制
說明
decbin(int
$number): string 返回一字串，包含有給定 number 參數的二進制表示。所能轉換的最大數值為十進制的
4294967295，其結果為 32 個 1 的字串。
參數
-
number Decimal value to convert
Range of inputs on 32-bit machines positive numbernegative numberreturn 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 numbernegative numberreturn 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
範例
示例 #1 decbin() 例子
<?php
echo decbin(12) . "\n";
echo decbin(26);
?> 以上例程會輸出：
1100 11010