# socket_strerror

(PHP 4 >= 4.1.0, PHP 5, PHP 7)

socket_strerror — Return a string describing a socket error

### 说明

socket_strerror ( int `$errno` ) : string

socket_strerror() takes as its `errno` parameter a socket error code as returned by socket_last_error() and returns the corresponding explanatory text.

> Note:

> Although the error messages generated by the socket extension are in English, the system messages retrieved with this function will appear depending on the current locale (`LC_MESSAGES`).

### 参数

`errno`

  A valid socket error number, likely produced by socket_last_error().

### 返回值

Returns the error message associated with the `errno` parameter.

### 范例

Example #1 socket_strerror() example

    <?php
    if (false == ($socket = @socket_create(AF_INET, SOCK_STREAM, SOL_TCP))) {
       echo "socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "\n";
    }

    if (false == (@socket_bind($socket, '127.0.0.1', 80))) {
       echo "socket_bind() failed: reason: " . socket_strerror(socket_last_error($socket)) . "\n";
    }
    ?>

The expected output from the above example (assuming the script is not run with root privileges):

    socket_bind() failed: reason: Permission denied

### 参见

- socket_accept() - Accepts a connection on a socket
- socket_bind() - 给套接字绑定名字
- socket_connect() - 开启一个套接字连接
- socket_listen() - Listens for a connection on a socket
- socket_create() - 创建一个套接字（通讯节点）