msg_send()
sends a
message
of type
msgtype
(which MUST be greater than 0) to a the message queue specified
by
queue
.
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
blocking
parameter to
FALSE
, in which case
msg_send()
will immediately return
FALSE
if the message is too big for the queue, and set the optional
errorcode
to EAGAIN, indicating that you should try to send your message
again a little later on.
The optional
serialize
controls how the
message
is sent.
serialize
defaults to
TRUE
which means that the
message
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.
Upon successful completion the message queue data
structure is updated as follows:
msg_lspid
is set to the process-ID of the calling process,
msg_qnum
is incremented by 1 and
msg_stime
is set to the current time.
See also:
msg_remove_queue()
,
msg_receive()
,
msg_stat_queue()
and
msg_set_queue()
.
This function was introduced in PHP 4.3.0 (not yet
released).