How to get a POST request in PHP using curl

I need to invoke this website ...

https://salute.regione.veneto.it/servizi/situazione-nei-pronto-soccorso?p_p_id=PRONTOSOCCORSO_WAR_portalprontosoccorso_INSTANCE_o0QZ&p_p_lifecycle=1&p_p_state=normal&p_p_mode=view&p_p_col_id=column-3&p_p_col_count=1

... selecting "101 - BELLUNO" as ULSS parameter and the string "PIEVE" in the "Nome Presidio Pronto Soccorso" text field as show in the picture belove

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using curl in a php code in POST mode.

These are the parameters I can see in my browser console

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I'm trying to use Poster Mozilla extension to understand how to manage the request parameters but I've some troubles.

Any suggestion / curl - PHP code samples to help me?

Thanks in advance!