# inet_ntop

(PHP 5 >= 5.1.0, PHP 7)

inet_ntop — Converts a packed internet address to a human readable representation

### 说明

inet_ntop ( string `$in_addr` ) : string

This function converts a 32bit IPv4, or 128bit IPv6 address (if PHP was built with IPv6 support enabled) into an address family appropriate string representation.

### 参数

`in_addr`

  A 32bit IPv4, or 128bit IPv6 address.

### 返回值

Returns a string representation of the address 或者在失败时返回 `FALSE`.

### 范例

Example #1 inet_ntop() Example

    <?php
    $packed = chr(127) . chr(0) . chr(0) . chr(1);
    $expanded = inet_ntop($packed);

    /* Outputs: 127.0.0.1 */
    echo $expanded;

    $packed = str_repeat(chr(0), 15) . chr(1);
    $expanded = inet_ntop($packed);

    /* Outputs: ::1 */
    echo $expanded;
    ?>

### 更新日志

版本 | 说明
--- | ---
5.3.0 | This function is now available on Windows platforms.

### 参见

- long2ip() - 将长整型转化为字符串形式带点的互联网标准格式地址（IPV4）
- ip2long() - 将 IPV4 的字符串互联网协议转换成长整型数字
- inet_pton() - Converts a human readable IP address to its packed in_addr representation