php - Uncaught Error: Call to undefined function curl_init()

Question

I have a wordpress plugin that is trying to use curl but giving me the following error.

PHP Fatal error: Uncaught Error: Call to undefined function curl_init()

$curl = curl_init();

I have the same issue on my local dev environment and in my staging environment.

http://topmortgagepro.com/whats-your-home-worth/ At the time of posting it will include the phpinfo() That will be removed if you see this at a later time. htaccess user/password is pixona:pixona to see the site.

I have tried many solutions offered with no luck. Open to ideas and can show other config settings as needed.

I have tried the following and restarted apache after each (on local machine):

apt-get install php-curl
apt-get install php7.0-curl

edited the php.ini to uncomment the following:

extension=php_curl.dll
extension=php_bz2.dll

added this extension in the php.ini

extension=php_curl.so

phpenmod curl

Answer 1

The solution came down to the distribution being out of date. To diagnose the issue I made a sample script to see if curl was loading.

<?php
    if (!extension_loaded('curl')) {
        echo 'failed';
    } else {
        echo 'loaded';
    }
?>

This gave me the following error:

PHP Warning: PHP Startup: Unable to load dynamic library       '/usr/lib/php/20131226/curl.so' - /usr/lib/php/20131226/curl.so: undefined symbol: zend_unset_property in Unknown on line 0

With that I came across this other question which suggested doing

apt-get dist-upgrade

PHP Startup: Unable to load dynamic library `curl.so` Ubuntu

After the upgrade (I used the new php.ini) the script worked perfectly.