Sending and receiving data to socket server in PHP

Sending and receiving data to socket server in PHP_PHP tutorial

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Release： 2016-07-20 11:11:30

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To send data to other programs in PHP, you need to use PHP's socket function to instantiate it. Let's briefly look at an example

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/*socket收发数据
    @host(string) socket服务器IP
    @post(int) 端口
    @str(string) 要发送的数据
    @back 1|0 socket端是否有数据返回
    返回true|false|服务端数据
*/
function sendSocketMsg($host,$port,$str,$back=0){
        $socket = socket_create(AF_INET,SOCK_STREAM,0);
        if ($socket < 0) return false;
        $result = @socket_connect($socket,$host,$port);
        if ($result == false)return false;
        socket_write($socket,$str,strlen($str));

        if($back!=0){
            $input = socket_read($socket,1024);
            socket_close ($socket);
            return $input;
        }else{
            socket_close ($socket);
            return true;
        }
}

/*socket sends and receives data
@host(string) socket server IP
@post(int) Port
@str(string) Data to be sent
@back 1|0 Whether there is data to return from the socket
Return true|false|Server Data
($socket < 0) return false;
$result = @socket_connect($socket,$host,$port);
if ($result == false)return false;
socket_write ($socket,$str,strlen($str));
socket_close ($socket); return $input; p>

The second parameter of socker_read is used to specify the number of bytes to be read. You can use it to limit the size of data obtained from the client.

sock function introduction

Socket function
Function name Description
socket_accept() Accept a Socket connection
socket_bind() Bind the socket to an IP address and port
socket_clear_error() Clear the socket error or the last error code
socket_close() Close a socket resource
socket_connect() Start a socket connection
socket_create_listen() Open a socket listening on the specified port
socket_create_pair() Generates a pair of undifferentiated sockets into an array
socket_create() Generates a socket, which is equivalent to generating a socket data structure
socket_get_option() Gets the socket option
socket_getpeername() Gets the remote Similar to the IP address of the host
socket_getsockname() Get the IP address of the local socket
socket_iovec_add() Add a new vector to a scattered/aggregated array
socket_iovec_alloc() This function creates a send, receive, read and write The iovec data structure
socket_iovec_delete() Deletes an allocated iovec
socket_iovec_fetch() Returns the data of the specified iovec resource
socket_iovec_free() Releases an iovec resource
socket_iovec_set() Sets the iovec data new Value
socket_last_error() Get the last error code of the current socket
socket_listen() Listen to all connections from the specified socket
socket_read() Read the data of the specified length
socket_readv() Read from the scatter/ Aggregate the data from the array
socket_recv() End the data from the socket to the cache
socket_recvfrom() Accept the data from the specified socket, if not specified, the current socket will be defaulted
socket_recvmsg() Receive the message from iovec
socket_select() Multiple selection
socket_send() This function sends data to the connected socket
socket_sendmsg() Sends a message to socket
socket_sendto() Sends a message to the socket at the specified address
socket_set_block () Set the socket to block mode
socket_set_nonblock() Set the socket to non-block mode
socket_set_option() Set the socket option
socket_shutdown() This function allows you to close reading, writing, or the specified socket
socket_strerror() Returns the detailed error with the specified error number
socket_write() Writes data to the socket cache
socket_writev() Writes data to the scatter/aggregate array

Note: socket_read function The shell client data will be read until n, t or characters are encountered. The PHP script regards these characters as the end of the input.