What is the best way to create a Singleton Webservice in PHP?

Question

We need to access a database that allows only one connection at a time. It screams singleton for me. The trick, of course, is that a singleton connection will be opened (directly or indirectly) through a web service (the most likely SOAP-based web service) located on a separate server from the calling application (s)), which means that there may be more than one application / instance trying to connect to the singleton class.

In PHP, what's the best way to create a global singleton or singleton web service?

TIA

Answer 1

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Answer 2

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$s1 = sem_get(123, 1);
sem_acquire($s1);

// soapserver code here

sem_release($s1);