NYCPHP Meetup

[LK]

Two people on separate PCs are sending instant messages to each other through Ajax on a common server. The sender posts a message and it gets stored in the database. How does the receiver get that message on the other machine? I can envision a polling mechanism whereby the receiver's client periodically polls the database through Ajax to see if a new message is there. But how does one do it through interrupts, without polling? Any ideas appreciated.
 
Leo


 
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