{"0":"1","ID":"1","1":"2017-10-21 12:39:23","Date":"2017-10-21 12:39:23","2":"Student1","Name":"Student1","3":"student1@stud.com","Email":"student1@stud.com","4":"89123456789","Phone":"89123456789","5":"u042du0423-119","Group":"u042du0423-119","6":"u041fu043eu0436u0435u043bu0430u043du0438u044f","Comment":"u041fu043eu0436u0435u043bu0430u043du0438u044f"}{"0":"2","ID":"2","1":"2017-10-21 20:20:49","Date":"2017-10-21 20:20:49","2":"u0441u0435u0440u0433u0435u0439","Name":"u0441u0435u0440u0433u0435u0439","3":"sad@dsfsd.com","Email":"sad@dsfsd.com","4":"89222222222","Phone":"89222222222","5":"u042du0423-119","Group":"u042du0423-119","6":"rrr","Comment":"rrr"}

<?php

    $host="mysql.hostinger.ru";
    $user="u997029462_bo";
    $pass="9128925907"; //установленный вами пароль
    $db_name="u997029462_bo";

    $link=mysql_connect($host,$user,$pass);
    mysql_select_db($db_name,$link);


$sql = mysql_query("SELECT * FROM Student", $link);
    while ($result = mysql_fetch_array($sql)) {
        echo json_encode($result);
    }

echo "["
while ($result = mysql_fetch_array($sql)) {
    echo json_encode($result);
    echo ",";
}
echo "]";