Why Am I Getting the \'Call to undefined function curl_init()\' Error in PHP and How Can I Fix It?

PHP: Handling the "Call to undefined function curl_init()" Error

In attempting to send a PHP POST request within another POST request, you may encounter the following error in your error.log file: "Call to undefined function curl_init()." This error indicates that PHP's CURL library support is not enabled.

To resolve this issue and utilize the CURL functions, follow these steps:

Install CURL Support for PHP

For Ubuntu:

sudo apt-get install php5-curl

Restart Apache

sudo /etc/init.d/apache2 restart

Verify Installation

Use phpinfo() to confirm that CURL is listed as installed. If not, you may need to investigate potential package installation issues.

Alternative Method

Another option to handle this error is to use the curl_init() function from the cURL library directly:

curl_init('http://localhost/index1.php');

This approach will bypass the PHP wrapper and eliminate the need for CURL support in PHP.

Additional Resources

• [PHP CURL documentation](https://www.php.net/manual/en/book.curl.php)
• [Installing cURL on Ubuntu](https://askubuntu.com/questions/184958/how-do-i-install-curl-on-ubuntu)
• [Using cURL in PHP without PHP CURL extension](https://stackoverflow.com/questions/1662944/how-to-use-php-curl-functions-without-the-php-curl-extension)

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