Why does ajax search not work with cyrillic?

Question

JavaScript

Hello. The problem is this: after moving to a new hosting on the ajax site, the search stopped searching in Cyrillic. Figures and Latin perceives normally. Site on opencart.
Here is the search code:

function doLiveSearch( ev, keywords ) {

  if( ev.keyCode == 38 || ev.keyCode == 40 ) {
    return false;
  }	

  $('#livesearch_search_results').remove();
  updown = -1;

  if( keywords == '' || keywords.length < 3 ) {
    return false;
  }
  keywords = encodeURI(keywords);

  $.ajax({
    url: $('#hidden').attr('href') + 'index.php?route=product/search/ajax&keyword=' + keywords,
    dataType: 'json',
    content: this,
    success: function(result) {
    if( result.length > 0 ) {
      var eList = document.createElement('ul');
      eList.id = 'livesearch_search_results';
      var eListElem;
      var eListElems;
      var eLink;
      for( var i in result ) {
        eListElem = document.createElement('li');
        eLink = document.createElement('a');
        $(function () {
              eListElems = document.createElement('img');
              eListElems.className='loading';
              $(eListElems).load(function () {
                $(this).show();
              })
          
          eListElems.src=result[i].image;
          eLink.appendChild(eListElems);
        });
        eLink.appendChild( document.createTextNode(result[i].name) );
        if( typeof(result[i].href) != 'undefined' ) {
          eLink.href = result[i].href;
        }
        else {
          eLink.href = $('#hidden').attr('href') + 'index.php?route=product/product&product_id=' + result[i].product_id + '&keyword=' + keywords;
        }
        eListElem.appendChild(eLink);
        eList.appendChild(eListElem);
      }
      if( $('#livesearch_search_results').length > 0 ) {
        $('#livesearch_search_results').remove();
      }
      $('#search').append(eList);
    }
  }});

  return true;
}

function upDownEvent( ev ) {
  var elem = document.getElementById('livesearch_search_results');
  var fkey = $('#search').find('[name=search]').first();

  if( elem ) {
    var length = elem.childNodes.length - 1;

    if( updown != -1 && typeof(elem.childNodes[updown]) != 'undefined' ) {
      $(elem.childNodes[updown]).removeClass('highlighted');
    }

    // Up
    if( ev.keyCode == 38 ) {
      updown = ( updown > 0 ) ? --updown : updown;
    }
    else if( ev.keyCode == 40 ) {
      updown = ( updown < length ) ? ++updown : updown;
    }

    if( updown >= 0 && updown <= length ) {
      $(elem.childNodes[updown]).addClass('highlighted');

      var text = elem.childNodes[updown].childNodes[0].text;
      if( typeof(text) == 'undefined' ) {
        text = elem.childNodes[updown].childNodes[0].innerText;
      }

      $('#search').find('[name=search]').first().val( new String(text).replace(/(\s\(.*?\))$/, '') );
    }
  }

  return false;
}

var updown = -1;

$(document).ready(function(){
  $('#search').find('[name=search]').first().keyup(function(ev){
    doLiveSearch(ev, this.value);
  }).focus(function(ev){
    doLiveSearch(ev, this.value);
  }).keydown(function(ev){
    upDownEvent( ev );
  }).blur(function(){
    window.setTimeout("$('#livesearch_search_results').remove();updown=0;", 600);
  });
  $(document).bind('keydown', function(ev) {
    try {
      if( ev.keyCode == 13 && $('.highlighted').length > 0 ) {
        document.location.href = $('.highlighted').find('a').first().attr('href');
      }
    }
    catch(e) {}
  });
});

Answer 1

If anyone needs it: the problem was in the controller of the live search module (the one in vqmod). The strlen, strtolower functions were used instead of utf8_strlen and utf8_strtolower.

Answer 2

See encoding. All must be in UTF-8

Answer 3

At one time, when migrating the store, I encountered a lot of problems, but they were caused by a banal difference in PHP and IonCube versions on the old and new hosting. Try to dig in this direction as well.