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17 years ago
Consider this e.g. Linux situation:



<?php

//file send.php

$ip = msg_get_queue(12340);

msg_send($ip,8,"abcd",false,false,$err);

//-----------------------------------------------------

<?php

//file receive.php

$ip = msg_get_queue(12340);



msg_receive($ip,0,$msgtype,4,$data,false,null,$err);

echo "msgtype {$msgtype} data {$data}\n";



msg_receive($ip,0,$msgtype,4,$data,false,null,$err);

echo "msgtype {$msgtype} data {$data}\n";

?>



Now run: 

in terminal #1   php5 receive.php

in terminal #2   php5 receive.php

in terminal #3   php5 send.php



Showing messages from queue will flip-flop. It means you run once send.php, the message will be shown in terminal #1. Second run it will be in t#2, third #1 and so on.
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