Why am I getting the \'Call to undefined function curl_init()?\' error when using Authorize.net?

Function Undefined Issue: Addressing "Call to undefined function curl_init()?"

When attempting to implement the Authorize.net payment gateway, you might encounter an error stating "Call to undefined function curl_init()." This indicates that the curl_init function is not registered or available in your PHP environment.

To resolve this issue, follow these instructions:

Windows Solution

1. Locate the php.ini file on your computer.

2. Remove the semicolon (;) from the beginning of the line:

   <code class="ini">extension=php_curl.dll</code>

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3. Save the file and restart your HTTP server (e.g., Apache).

Ubuntu 13.0 or Above Solution

1. Install the debundled package:

   sudo apt-get install php-curl

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Ubuntu with PHP5 Solution

1. Install the correct PHP package:

   sudo apt-get install php5-curl

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   OR

   sudo apt-get install php5.6-curl

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2. Restart Apache to activate the package:

   sudo service apache2 restart

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After completing these steps, the curl_init() function will be registered and available in your PHP environment, enabling you to proceed with the Authorize.net payment gateway implementation without encountering the "Call to undefined function curl_init()" error.

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