What is the best way to make attributes generic and easy to use?

Question

PHP

Good day.
Please tell me, there is a tourist catalog of Russia, which describes sights, parks, temples, etc. Each directory element has its own attributes. (Which can communicate with each other)
The following options are currently being discussed:

• EAV
  
• Mongo
  
• Using a JSON field in a relational table
  

What is the best way to organize them? If anyone has experience with these methods, please share your experience.

Answer 1

Modified and working your bike:

$(document).ready(function(){
 var success_y = false;
 
$('#input_mbr').on('input', function(){
  var val = $(this).val(),
   n = /https?:\/\/vk\.com\/[a-z0-9:@./?\\%&=]+/i ;
  
  if (!n.test(val)) {
   $(this).addClass('wrongt');
   success_y = false;
 
   $('#ervkin').fadeIn(750);
   return false;
  } else {
   $(this).removeClass('wrongt');
   $('#ervkin').fadeOut(500);
   success_y = true;
  }
 });
 
  $('.follow').submit(function(){
    if (!$success_y) $('#ervkin').fadeIn(750);
    if (!$success_y) return false;
  });
});