(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)
socket_read — Reads a maximum of length bytes from a socket
$socket
, int $length
, int $mode = PHP_BINARY_READ
) : string|false
The function socket_read() reads from the Socket instance
socket created by the
socket_create() or
socket_accept() functions.
socketA Socket instance 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 mode
parameter, see below).
mode
Optional mode 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.
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.
注意:
socket_read() returns a zero length string ("") when there is no more data to read.
| 版本 | 说明 |
|---|---|
| 8.0.0 |
socket is a Socket instance now;
previously, it was a resource.
|