How to Fix \"Call to undefined function curl_init()\" Error When Integrating Authorize.net Payment Gateway?

Undefined Function: curl_init()

In the context of implementing Authorize.net's payment gateway, you may encounter the error "Call to undefined function curl_init()". This indicates that the PHP curl extension is not properly configured or installed on your system.

Windows Operating System

For Windows users, verify your php.ini file for the following line:

;extension=php_curl.dll

Remove the semicolon (;) from the beginning of this line. Save the file and restart your HTTP server (e.g., Apache) for the changes to take effect.

Ubuntu Operating System (13.0 versions)

Install the debundled curl package using the command:

sudo apt-get install php-curl

For PHP5 versions, use one of the following commands:

sudo apt-get install php5-curl
sudo apt-get install php5.6-curl

Remember to restart Apache afterwards:

sudo service apache2 restart

By following these steps, you should now have curl enabled and accessible in your PHP scripts, allowing you to integrate the Authorize.net payment gateway seamlessly.

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