Send and receive data to the socket server in PHP

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/*socket send and receive data @host (string) socket server IP @post (int) port @str (string) the data to send @back 1|0 socket end has data return Returns true|false| server-side data */ 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; } }

The second parameter of Socker_read specifies the number of bytes to read, which you can use to limit the size of the data being fetched from the client.

Introduction to Sock functions

Socket function
Function Name Description
Socket_accept () accepts a socket connection
Socket_bind () binds the socket to an IP address and port
Socket_clear_error () Clears the socket error or the last error code
Socket_close () closes a socket resource
Socket_connect () Start a socket connection
Socket_create_listen () opens a socket listener on the specified port
Socket_create_pair () produces a pair of indistinguishable sockets into an array
Socket_create () produces a socket, which is equivalent to generating a socket data structure
Socket_get_option () Get socket option
Socket_getpeername () Gets the IP address of a remote similar host
Socket_getsockname () Gets the IP address of the local socket
Socket_iovec_add () adds a new vector to a scatter/aggregate array
Socket_iovec_alloc () This function creates a IOVEC data structure capable of sending and receiving read and write
Socket_iovec_delete () deletes an already allocated Iovec
Socket_iovec_fetch () returns the data for the specified Iovec resource
Socket_iovec_free () frees a Iovec resource
Socket_iovec_set () sets the Iovec data new value
Socket_last_error () Gets the last error code for the current socket
Socket_listen () listens for all connections by the specified socket
Socket_read () reads the specified length of data
SOCKET_READV () reads data coming from a scatter/aggregate array
SOCKET_RECV () end data from socket to cache
Socket_recvfrom () accepts data from the specified socket and, if not specified, the default current socket
Socket_recvmsg () received a message from Iovec
Socket_select () multi-channel selection
Socket_send () This function sends data to the connected socket
SOCKET_SENDMSG () Send message to socket
Socket_sendto () sends a message to the socket at the specified address
Socket_set_block () is set to block mode in the socket
Socket_set_nonblock () socket is set to not block mode
Socket_set_option () Set socket options
Socket_shutdown () This function allows you to close a read, write, or specified socket
Socket_strerror () returns a detailed error for the specified error number
Socket_write () write data to the socket cache
Socket_writev () write data to a scatter/aggregate array

Note: The Socket_read function reads the shell-side data until it meets n,t or characters, which the PHP script regards as the end character of the input.