WordPress Save and Retrieve Transient Content In Database

function imnobby_transient_ajx_response_demo(){

 $transient_name = "my_query_cache";

 // Display Transient Data Directly If Available
 if ( !(false === ( $response_json = get_transient( $transient_name ))) ) {
 echo $response_json;
 exit;
 }
 
 $response_json = do_your_query_functions_here();
 
 set_transient( $transient_name , $response_json, 60 ); // Store Transient for 60 Seconds

 echo $response_json;

 exit;
}
add_action('wp_ajax_imnobby_transient_ajx_response_demo', 'imnobby_transient_ajx_response_demo'); // For Logged-in Users
add_action('wp_ajax_nopriv_imnobby_transient_ajx_response_demo', 'imnobby_transient_ajx_response_demo' ); // For Unauthenticated Users

function do_your_query_functions_here(){
 
 $tmphtml = "";
 return $tmphtml;
 
}

// Related Plugin: Transients Manager