socket_read
(PHP 4 >= 4.0.7, PHP 5)
socket_read — Reads a maximum of length bytes from a socket
说明
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 \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.
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 |
