what steps required to create a IdP initated login with a magicLink in it and redirect to SP

[pentium10]

We have the following requirements:

• we will be the Idp
• user will have a magic link
• IdP initiated login hits us first time
• verify if magicLink checks out, follow with RelayState.
• end up on the 3rd party website, without username/password prompt

Is there a guide that covers this use case? Is this use case possible with this repo? What shall be developed to make this happen?

[pitbulk]

php-saml implements the Service Provider part, not the Identity Provider part.

I recommend you to take a look at simpleSAMLphp instead.