HI I've converted a call center app from Oracle Forms into a web app using PHP

i am using oci_pconnect() to connect to the DB but we are seeing very high connections (in excess of 40 000 a day) because each user has a unique username and password. this is obviously killing the DB

darbe veya yeniden bağlantılarını en aza indirmek için en iyi uygulamalar üzerinde herhangi bir tavsiye?