How to hook a function into filter in a class of plugin from wordpress

Question

I am not very old on Wordpress.

I am developing a website which has a Third party plugin having class Plugin_Class and there are some filters in the construct of it. I want to hook my additional function to filter Plugin_filter_1 from functions.php.

I have tried with the syntax add_filter( 'Plugin_filter_1', array('Plugin_Class', 'my_function_defined_in_functions_php' ) ); ,

it gives me error even if the class is visible ( checked with get_declared_classes() )

The detailed answer will be appreciated

Thanks for your help Regards

Answer 1

Possibly the issue is that your second parameter for add_filter is an array with Plugin_Class as the first element- this means wordpress will try to fire PluginClass::my_function_defined_in_functions_php , which doesn't exist.

Instead, just pass it a string of 'my_function_defined_in_functions_php' .

If this doesn't work with just this edit, show us the code in the plugin class- including the class name and entire construct method. There are more possible issues.