Ajax, parse_str, jquery

$('form').submit(function(event) {
    event.preventDefault();
    
    // kód pro validaci formuláře
    
    var $this = $(this);
    
    var url = $this.attr('action');
    var dataToSend = $this.serialize();
    
    
    var callback = function(dataReceived) {
    // výstup ze skriptu na serveru
      };
    var typeOfDataToReceive = 'html';
    
    $.get(url, dataToSend, callback, typeOfDataToReceive);
    });

parse_str($_GET['dataToSend'], $dataReceived);

foreach ($dataReceived as $value) {
echo $value; 
}