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PHP 中的 base_convert()函数
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Definition and Usage
定义和用法
The base_convert() function converts a number from one base to another.
base_convert()函数的作用是：在任意进制之间转换数字。
Syntax
语法
base_convert(number,frombase,tobase) |
| Parameter参数 | Description描述 |
|---|---|
| number | Required. Original value 必要参数。定义初始值 |
| frombase | Required. Original base of number. Frombase has 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. 必要参数。指定初始进制数。初始进制数的范围位于2和36之间（包括2和36）；数值总位数如果大于10位，那么它将用a-z之间的字母表示，即：a表示10位，b表示11位，z表示35位数字 |
| tobase | Required. The base to convert to. Tobase has 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. 必要参数。指定需要转换为的进制数。初始进制数的范围位于2和36之间（包括2和36）；数值总位数如果大于10位，那么它将用a-z之间的字母表示，即：a表示10位，b表示11位，z表示35位数字 |
Example 1
案例1
Convert an octal number to a decimal number:
将一个八进制数字转换为十进制：
<?php $oct = "0031"; $dec = base_convert($oct,8,10); echo "$oct in octal is equal to $dec in decimal."; ?> |
The output of the code above will be:
上述代码将输出下面的结果：
0031 in octal is equal to 25 in decimal. |
Example 2
案例2
Convert an octal number to a hexadecimal number:
将一个八进制数字转换为十六进制：
<?php $oct = "3648"; $hex = base_convert($oct,8,16); echo "$oct in octal is equal to $hex in hexadecimal."; ?> |
The output of the code above will be:
上述代码将输出下面的结果：
3648 in octal is equal to f4 in hexadecimal. |
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