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>msg_send</H1
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><P
> (PHP 4 >= 4.3.0, PHP 5)</P
>msg_send --
Send a message to a message queue
</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN205637"
></A
><H2
>Description</H2
>bool <B
CLASS="methodname"
>msg_send</B
> ( resource queue, int msgtype, mixed message [, bool serialize [, bool blocking [, int &errorcode]]] )<BR
></BR
><P
> <B
CLASS="function"
>msg_send()</B
> sends a <CODE
CLASS="parameter"
>message</CODE
> of type
<CODE
CLASS="parameter"
>msgtype</CODE
> (which MUST be greater than 0) to
the message queue specified by <CODE
CLASS="parameter"
>queue</CODE
>.
</P
><P
> If the message is too large to fit in the queue, your script will wait
until another process reads messages from the queue and frees enough
space for your message to be sent.
This is called blocking; you can prevent blocking by setting the
optional <CODE
CLASS="parameter"
>blocking</CODE
> parameter to <TT
CLASS="constant"
><B
>FALSE</B
></TT
>, in which
case <B
CLASS="function"
>msg_send()</B
> will immediately return <TT
CLASS="constant"
><B
>FALSE</B
></TT
> if the
message is too big for the queue, and set the optional
<CODE
CLASS="parameter"
>errorcode</CODE
> to <TT
CLASS="constant"
><B
>MSG_EAGAIN</B
></TT
>, indicating that you should
try to send your message again a little later on.
</P
><P
> The optional <CODE
CLASS="parameter"
>serialize</CODE
> controls how the
<CODE
CLASS="parameter"
>message</CODE
> is sent. <CODE
CLASS="parameter"
>serialize</CODE
>
defaults to <TT
CLASS="constant"
><B
>TRUE</B
></TT
> which means that the <CODE
CLASS="parameter"
>message</CODE
> is
serialized using the same mechanism as the session module before being
sent to the queue. This allows complex arrays and objects to be sent to
other PHP scripts, or if you are using the WDDX serializer, to any WDDX
compatible client.
</P
><P
> Upon successful completion the message queue data structure is updated as
follows: <CODE
CLASS="parameter"
>msg_lspid</CODE
> is set to the process-ID of the
calling process, <CODE
CLASS="parameter"
>msg_qnum</CODE
> is incremented by 1 and
<CODE
CLASS="parameter"
>msg_stime</CODE
> is set to the current time.
</P
><P
> See also <A
HREF="function.msg-remove-queue.html"
><B
CLASS="function"
>msg_remove_queue()</B
></A
>,
<A
HREF="function.msg-receive.html"
><B
CLASS="function"
>msg_receive()</B
></A
>,
<A
HREF="function.msg-stat-queue.html"
><B
CLASS="function"
>msg_stat_queue()</B
></A
> and
<A
HREF="function.msg-set-queue.html"
><B
CLASS="function"
>msg_set_queue()</B
></A
>.
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