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>socket_read</H1
><DIV
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><P
> (PHP 4 >= 4.1.0, PHP 5)</P
>socket_read -- Reads a maximum of length bytes from a socket</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN213399"
></A
><H2
>Description</H2
>string <B
CLASS="methodname"
>socket_read</B
> ( resource socket, int length [, int type] )<BR
></BR
><P
> The function <B
CLASS="function"
>socket_read()</B
> reads from the socket
resource <CODE
CLASS="parameter"
>socket</CODE
> created by the
<A
HREF="function.socket-create.html"
><B
CLASS="function"
>socket_create()</B
></A
> or
<A
HREF="function.socket-accept.html"
><B
CLASS="function"
>socket_accept()</B
></A
> functions. The maximum number of bytes read
is specified by the <CODE
CLASS="parameter"
>length</CODE
> parameter. Otherwise
you can use \r, \n, or \0 to end reading
(depending on the <CODE
CLASS="parameter"
>type</CODE
> parameter, see below).
</P
><P
> <B
CLASS="function"
>socket_read()</B
> returns the data as a string on success, or
<TT
CLASS="constant"
><B
>FALSE</B
></TT
> on error (including if the remote host has closed the
connection). The error code can be retrieved with
<A
HREF="function.socket-last-error.html"
><B
CLASS="function"
>socket_last_error()</B
></A
>. This code may be passed to
<A
HREF="function.socket-strerror.html"
><B
CLASS="function"
>socket_strerror()</B
></A
> to get a textual representation of
the error.
</P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>
<B
CLASS="function"
>socket_read()</B
> returns a zero length string ("")
when there is no more data to read.
</P
></BLOCKQUOTE
></DIV
><P
> Optional <CODE
CLASS="parameter"
>type</CODE
> parameter is a named constant:
<P
></P
><UL
><LI
><P
> PHP_BINARY_READ - use the system <TT
CLASS="literal"
>recv()</TT
> function.
Safe for reading binary data. (Default in PHP >= 4.1.0)
</P
></LI
><LI
><P
> PHP_NORMAL_READ - reading stops at \n or \r. (Default in PHP <= 4.0.6)
</P
></LI
></UL
>
</P
><P
> See also
<A
HREF="function.socket-accept.html"
><B
CLASS="function"
>socket_accept()</B
></A
>,
<A
HREF="function.socket-bind.html"
><B
CLASS="function"
>socket_bind()</B
></A
>,
<A
HREF="function.socket-connect.html"
><B
CLASS="function"
>socket_connect()</B
></A
>,
<A
HREF="function.socket-listen.html"
><B
CLASS="function"
>socket_listen()</B
></A
>,
<A
HREF="function.socket-last-error.html"
><B
CLASS="function"
>socket_last_error()</B
></A
>,
<A
HREF="function.socket-strerror.html"
><B
CLASS="function"
>socket_strerror()</B
></A
> and
<A
HREF="function.socket-write.html"
><B
CLASS="function"
>socket_write()</B
></A
>.
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