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# socket_read

(PHP 4 >= 4.1.0, PHP 5)

socket_read -- Reads a maximum of length bytes from a socket

## Description

string socket_read ( resource socket, int length [, int type])

切記!
這個函數是實驗性質的。這個函數的行為、名稱、和關於此函數的任何其他文件在未來PHP的發行中可能會在不通知的情況下改變。 使用此延伸需自行承擔風險。

The function socket_read() reads from the socket resource socket created by the socket_create() or socket_accept() functions. 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).

socket_read() returns the data as a string on success, or `FALSE` on error. 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.

> 備注: socket_read() may return a zero length string ("") indicating the end of communication (i.e. the remote end point has closed the connection).

Optional type parameter is a named constant:

- PHP_BINARY_READ - use the system read() function. Safe for reading binary data. (Default in PHP >= 4.1.0)

- PHP_NORMAL_READ - reading stops at \n or \r. (Default in PHP <= 4.0.6)

See also socket_accept(), socket_bind(), socket_connect(), socket_listen(), socket_last_error(), socket_strerror() and socket_write().

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