Hello world! Hash password question

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PHP

hi

password_hash($_POST['password'], PASSWORD_BCRYPT) );

This is a just littel cut I used to code my signup page.
Problem is my login page how to code login so that the 50 char long hashed password match>?
I can however copy password hashed one from table and paste it iin password and login
sucessfully @!

I hope question is not muddy and correct understood thanks for any input!1

Welll I tried this

$password = password_hash($_POST["password"], PASSWORD_BCRYPT);

to embed the provided login password with the same method as when signup
but not logic enough obviously, it comes up with a different password.

What I have tried:

i have tried different methods