Fatal error: Call to undefined function is_plugin_active()

Hi, @eieutil.

is_plugin_active() is a WordPress function.

I’m using that in the plugin now because it’s inregrated to another one (Sirv).

Please let me know whitch is your WordPress version.

And, for now, you can use FIFU 1.3.9 instead of 1.4.3
Version 1.3.9

• This reply was modified 8 years, 5 months ago by Marcel.

I have checked now. This function is present since WordPress 2.5.

And the minimum requirement is to have PHP 4.3 or greater.

Then please inform your PHP version as well.

Deleted

• This reply was modified 8 years, 5 months ago by eieutil.

My version is WordPress 4.6.1 and PHP 7.

Other error messages that the plugin to activate.
Warning: shell_exec() has been disabled for security reasons in /home/u263666122/public_html/wp-content/plugins/featured-image-from-url/admin/menu.php on line 30
Fatal error: Uncaught Error: Call to undefined function is_plugin_active() in /home/u263666122/public_html/wp-content/plugins/featured-image-from-url/includes/thumbnail.php:14 Stack trace: #0 /home/u263666122/public_html/wp-includes/plugin.php(524): fifu_add_social_tags(”) #1 /home/u263666122/public_html/wp-includes/general-template.php(2555): do_action(‘wp_head’) #2 /home/u263666122/public_html/wp-content/themes/header.php(20): wp_head() #3 /home/u263666122/public_html/wp-includes/template.php(572): require_once(‘/home/u26366612…’) #4 /home/u263666122/public_html/wp-includes/template.php(531): load_template(‘/home/u26366612…’, true) #5 /home/u263666122/public_html/wp-includes/general-template.php(45): locate_template(Array, true) #6 /home/u263666122/public_html/wp-content/themes/index.php(1): get_header() #7 /home/u263666122/public_html/wp-includes/template-loader.php(75): include(‘/home/u26366612…’) #8 /home/u263666122/public_html/wp-blog-header.php(19): require_once(‘/home/u26366612…’) #9 /ho in /home/u263666122/public_html/wp-content/plugins/featured-image-from-url/includes/thumbnail.php on line 14

Version featured-image-from-url.1.3.9 OK!

Hi, @eieutil

Could you install the last release 1.4.4? It should fix the “is_plugin_active()” error.

About the another problem “Warning: shell_exec() has been disabled for security reasons”, it’s not an error. It’s a warning that means your server is configured to reject shell_exec calls for security reasons.

As it’s described in the settings, the shell_exec is being called by FIFU because it needs to replace some lines of WooCommerce plugin to show the external images there. When you deactivates FIFU, WooCommerce plugin loses the changes.

To get around the problem you should configure your server to enable shell_exec calls. But if, for some reason, it’s not possible, you can hire me to do a manual integration.