Php/docs/function.gmp-import

• PHP Manual
• GMP 函数
• Import from a binary string

gmp_import

(PHP 5 >= 5.6.1, PHP 7)

gmp_import — Import from a binary string

说明

gmp_import ( string $data [, int $word_size = 1 [, int $options = GMP_MSW_FIRST | GMP_NATIVE_ENDIAN ]] ) : GMP|false

Import a GMP number from a binary string

参数

data

The binary string being imported

word_size

Default value is 1. The number of bytes in each chunk of binary data. This is mainly used in conjunction with the options parameter.

options

Default value is GMP_MSW_FIRST | GMP_NATIVE_ENDIAN.

返回值

Returns a GMP number 或者在失败时返回 false.

范例

Example #1 gmp_import() example

<?php$number = gmp_import("\0");echo gmp_strval($number) . "\n";$number = gmp_import("\0\1\2");echo gmp_strval($number) . "\n";?>

以上例程会输出：

0
258

参见

• gmp_export() - Export to a binary string