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This article introduces the relevant knowledge of "what is the method of checking the validity period of SSL certificates". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

After the SSL certificate expires, the browser will issue an alarm to the visiting user, which will have a great impact on the user's access experience and trust, so website administrators must always pay attention to the validity period of the SSL certificate. The following three parties will introduce three ways to check the validity of SSL certificates.

Method 1: view it directly on the browser

The premise of this method is that your domain name has been pointed to the web server and can be accessed normally on the browser. First use the browser to access the domain name of your site, and then click the lock icon on the address bar to view:

Then click "Certificate" to view the validity period of the SSL certificate, as shown in the following figure:

Method 2: use the Openssl tool on the server side to view

Since our server is built on Centos, after logging in with xshell or putty tool, enter the certificate directory and use the openssl command to check:

Change the above to the directory where your own certificate is located, and the certificate name to the name of the certificate on your own server.

Method 3: use the php code method to view

Output:

The above describes three ways to check the expiration of SSL certificates. Generally speaking, the most commonly used method is to view it directly on the browser, which is convenient and fast.

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