socket_read Reads a maximum of length bytes from a socket

socket_read

(PHP 4 >= 4.1.0, PHP 5)

socket_read — Reads a maximum of length bytes from a socket

说明

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.

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 length parameter. Otherwise you can use , , or 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 or .

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.

更新日志

版本	说明
4.1.0	The default value for `type` was changed from `PHP_NORMAL_READ` to `PHP_BINARY_READ`

参见

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

« socket_listen
» socket_recv

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