OpenSSL-about PHP read client browser import private certificate

Business Scenarios
1. HTTPS public encryption is already available
2. Now want to add an interactive validation on this basis
3. Generate certificates and so on are easy to solve, the current question PHP how to read the client browser certificate

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Business Scenarios
1. HTTPS public encryption is already available
2. Now want to add an interactive validation on this basis
3. Generate certificates and so on are easy to solve, the current question PHP how to read the client browser certificate

How does the browser have the certificate, if it is HTTPS authentication, the certificate should be provided by the website.
If you are making a system on your own, you can simply pass the certificate information to the server via the parameters. Don't know how you are in a situation.

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