How to deal with PHP being unable to obtain data after the SSL certificate is installed on IIS

How to deal with PHP being unable to obtain data after the SSL certificate is installed on IIS

In recent years, with the increasing awareness of network security, the installation of SSL certificates has become increasingly important. In the Windows environment, many websites use IIS as the web server, and PHP is also widely used as the server-side scripting language. However, after installing the SSL certificate, sometimes there will be a problem that PHP cannot obtain data, which may cause website service abnormalities. This article provides a solution to this problem and provides detailed code examples.

Problem Analysis:

In a Windows environment, especially after installing an SSL certificate on the IIS server, PHP may have problems when requesting external HTTPS resources. This is because PHP does not support the SSL/TLS protocol by default, resulting in the inability to properly verify the SSL certificate. In this case, an error message like "cURL error 60: SSL certificate problem: unable to get local issuer certificate" usually appears.

Solution:

In order to solve the problem that PHP cannot obtain data after installing the SSL certificate on IIS, we can handle it through the following steps:

1. Download the certificate File:

First, we need to download the root certificate file of the SSL certificate, which can be downloaded from the official website of the SSL Certificate Authority, and save it to the specified directory on the server.

2. Configure the php.ini file:

Next, we need to configure the PHP php.ini file, enable the SSL extension and set the root certificate file path. Open the php.ini file, search for the following two lines of configuration, and make sure the configuration is correct:

extension=php_openssl.dll
curl.cainfo = "C:/path/to/your/cacert.pem"

Among them, "C:/path/to/your/cacert.pem" is the path to the root certificate file.

3. Use the cURL library for HTTPS requests:

In PHP, the cURL library is usually used for HTTP requests, including HTTPS requests. By modifying cURL's configuration, we can make it correctly validate SSL certificates when requesting HTTPS resources. The following is a simple sample code:

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'https://example.com/api');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
curl_setopt($ch, CURLOPT_CAINFO, 'C:/path/to/your/cacert.pem');
$result = curl_exec($ch);
curl_close($ch);
echo $result;

In this code, we verify the SSL certificate by setting CURLOPT_SSL_VERIFYPEER, and CURLOPT_CAINFO specifies the path to the root certificate file.

4. Test code:

Finally, we can test whether the modified code can successfully obtain HTTPS resources. This can be verified by visiting an HTTPS URL and getting the data.

Summary:

Through the above steps, we can solve the problem that PHP cannot obtain data after installing the SSL certificate on IIS. By configuring the php.ini file and using the cURL library, we can enable PHP to correctly verify the SSL certificate and successfully request HTTPS resources. In actual applications, please flexibly adjust the code according to the specific situation and ensure the validity of the SSL certificate.

I hope this article can help readers solve similar problems and ensure the security and normal operation of the website.

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