Reads a maximum of length bytes from a socket

설명

string socket_read ( resource $socket , int $length [, int $type= PHP_BINARY_READ ] )

The function socket_read() reads from the socket resource socket created by the socket_create() or socket_accept() functions.

인수

socket

A valid socket resource created with socket_create() or socket_accept().

length

The maximum number of bytes read is specified by the length parameter. Otherwise you can use \r, \n, or \0 to end reading (depending on the type parameter, see below).

type

Optional type parameter is a named constant:

PHP_BINARY_READ (Default) - use the system recv() function. Safe for reading binary data.
PHP_NORMAL_READ - reading stops at \n or \r.

반환값

socket_read() returns the data as a string on success, or FALSE on error (including if the remote host has closed the connection). The error code can be retrieved with socket_last_error(). This code may be passed to socket_strerror() to get a textual representation of the error.

Note: socket_read() returns a zero length string ("") when there is no more data to read.

변경점

버전	설명
4.1.0	The default value for `type` was changed from `PHP_NORMAL_READ` to `PHP_BINARY_READ`

참고

socket_accept() - Accepts a connection on a socket
socket_bind() - Binds a name to a socket
socket_connect() - Initiates a connection on a socket
socket_listen() - Listens for a connection on a socket
socket_last_error() - Returns the last error on the socket
socket_strerror() - Return a string describing a socket error
socket_write() - Write to a socket