# gmp_export

(PHP 5 >= 5.6.1, PHP 7)

gmp_export — Export to a binary string

### 说明

gmp_export ( GMP `$gmpnumber` [, int `$word_size` = 1 [, int `$options` = `GMP_MSW_FIRST` | `GMP_NATIVE_ENDIAN` ]] ) : string

Export a GMP number to a binary string

### 参数

`gmpnumber`

  The GMP number being exported

`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 string 或者在失败时返回 `FALSE`.

### 范例

Example #1 gmp_export() example

    <?php
    $number = gmp_init(16705);
    echo gmp_export($number) . "\n";
    ?>

以上例程会输出：

    AA

### 参见

- gmp_import() - Import from a binary string