How To Get Search Term and Use in Function

Question

I'm trying to write a function that will 'grab' the search term entered into the blog search form, and then hook the function to the get_search_query filter like this add_filter('get_search_query','myFunction'); so that everytime a search is made, 'myFunction' runs and grabs the search term (or so I think), I have this line in myFunction to grab the search term

$search_term = get_search_query();

but it seems to be causing problem, the blog doesn't display, except I comment that particular line out. What is the right way to achieve the subject. Thanks.

Here is the code:

function myFunction(){
global $wpdb;
$search_term = get_search_query();
$table = $wpdb->prefix . "tableName"; 
$insert = "INSERT into $table(`serach_term`) VALUES ('$search_term')";
$wpdb->query($insert);   
}

add_filter('get_search_query','myFunction');

Answer 1

You're adding a filter to get_search_query, and within that function calling get_search_query, which runs your filter, which calls get_search_query, which runs your filter, which calls get_search_query, which runs your filter… do you see the problem here?

The search query is passed to the filter as an argument, so you don't need to fetch it-

function myFunction($search_term){
    // now you can use $search_term directly in your code
}
add_filter('get_search_query','myFunction');