Need to create user with password from php encryption issue

Greetings,

All i need is to can create users from my own php app, all my research tell me about the blowfish encryption, but always ask for the key that i already have in the settings of the system and the enciv that i don’t know what is, i think i need it, to mi hash can be equal that te existing in the database when i parse to made the login, please if someone can tell me how to find the enciv or if someone have some script that works i’ll be very grateful, thank’s for your answers.