Does a login system prevent Spam?

[olddocks]

i am currently working on a small blog project with PHP. I have implemented a login system where users must register an account to make a blog post and comment it.

does this necessarily prevent SPAM (like comment spam etc) ?

[Markus]

i am currently working on a small blog project with PHP. I have implemented a login system where users must register an account to make a blog post and comment it.

does this necessarily prevent SPAM (like comment spam etc) ?

Only if you take the necessary precautions to prevent spambots from registering with your website (i.e. captcha)

:)