gmp_init
(PHP 4 >= 4.0.4, PHP 5)
gmp_init — Create GMP number
说明
resource gmp_init ( mixed $number [, int $base = 0 ] )Creates a GMP number from an integer or string.
参数
- number
-
An integer or a string. The string representation can be decimal, hexadecimal or octal.
- base
-
The base.
The base may vary from 2 to 36. If base is 0 (default value), the actual base is determined from the leading characters: if the first two characters are 0x or 0X, hexadecimal is assumed, otherwise if the first character is "0", octal is assumed, otherwise decimal is assumed.
返回值
GMP 数值资源.
更新日志
| 版本 | 说明 |
|---|---|
| 5.3.2 | The base was extended from 2 to 36, to 2 to 62 and -2 to -36. |
| 4.1.0 | The optional base parameter was added. |
注释
Note:
To use the extended base introduced in PHP 5.3.2, then PHP must be compiled against GMP 4.2.0 or greater.
范例
Example #1 Creating GMP number
<?php
$a = gmp_init(123456);
$b = gmp_init("0xFFFFDEBACDFEDF7200");
?>
注释
Note:
It is not necessary to call this function if you want to use integer or string in place of GMP number in GMP functions, like gmp_add(). Function arguments are automatically converted to GMP numbers, if such conversion is possible and needed, using the same rules as gmp_init().
