(PHP 4 >= 4.1.0, PHP 5, PHP 7)
socket_read — Reads a maximum of length bytes from a socket
$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.
socketA 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.
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.