socket_read
(PHP 4 >= 4.1.0, PHP 5, PHP 7)
socket_read — Reads a maximum of length bytes from a socket
说明
$socket
, int $length
[, int $type = PHP_BINARY_READ
] ) : string
The function socket_read() reads from the socket
resource socket created by the
socket_create() or
socket_accept() functions.
参数
-
socket -
A valid socket resource created with socket_create() or socket_accept().
-
length -
The maximum number of bytes read is specified by the
lengthparameter. Otherwise you can use\r,\n, or\0to end reading (depending on thetypeparameter, see below). -
type -
Optional
typeparameter 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.
-
返回值
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.
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_last_error() - Returns the last error on the socket
- socket_strerror() - Return a string describing a socket error
- socket_write() - Write to a socket