MYSQLI mysqli_real_escape_string and PHP problems

嘿，大家好……我在这个脚本上遇到了很多麻烦。我想这是标准的PHP MYSQLI。它一直有效，直到我尝试添加mysqli_real_escape字符串部分。有什么想法吗？

<?php
    require_once 'connect.php';
    $name = ($_POST['name']);
    $address = ($_POST['address']);
    $city = ($_POST['city']);
    $state = ($_POST['state']);
    $zip = ($_POST['zip']);
    $persons = ($_POST['persons']);
    $damages = ($_POST['damages']);
    $complaint = ($_POST['complaint']);
    $safename = mysqli_real_escape_string($connection, $name);
    $safeaddress = mysqli_real_escape_string($connection, $address);
    $safecity = mysqli_real_escape_string($connection, $city);
    $safestate = mysqli_real_escape_string($connection, $state);
    $safezip = mysqli_real_escape_string($connection, $zip);
    $safedate = mysqli_real_escape_string($connection, $date);
    $safepersons = mysqli_real_escape_string($connection, $persons);
    $safedamages = mysqli_real_escape_string($connection, $damages);
    $safecomplaint = mysqli_real_escape_string($connection, $complaint);
    $query = "INSERT INTO blacklisted 
    (
    name, 
    address, 
    city, 
    state, 
    zip, 
    date, 
    persons, 
    damages, 
    complaint
    )
    VALUES 
    (
    ".$safename.", 
    ".$safeaddress.", 
    ".$safecity.",
    ".$safestate.", 
    ".$safezip.", 
    ".$safedate.", 
    ".$safepersons.", 
    ".$safedamage.", 
    ".$safecomplaint."
    )";
    $result = mysqli_query($connection, $query);
    mysqli_free_result($result);
    mysqli_close($connection);
    ?>

我以为一切都会好起来，但现在我很困惑。