Http表单输入值如上所示

Question

I made a form to edit data from a database, but something just went wron, the values catched from the databse are also posted above the form. But i definitly dont know why? If I remove the value='phpcode', then everything is ok, so are there any xhtml mistakes or why is this happening

else if ($_GET['site'] == "edit") {
    if ($_GET['id'] == "" && !isset($_GET['id'])) {
        $content = "Dieser Eintrag existiert nicht!";
    } else {
        $editfailed  = 0;
        $editsuccess = false;

        if (isset($_POST['submit']) && $_POST['submit'] == "Speichern") {
            if ($_POST['enterprise'] == "" && $_POST['category'] == "" && $_POST['type'] == "" && $_POST['editenterprise_pw'] == "") {
                $editfailed = 1;
            } else {
                $enterprise = $mysqli->real_escape_string(rawurldecode($_POST['enterprise']));
                $category   = $mysqli->real_escape_string(rawurldecode($_POST['category']));
                $type       = $mysqli->real_escape_string(rawurldecode($_POST['type']));

                $result  = $mysqli->query("SELECT * FROM `enterprises` WHERE `name` = '" . $enterprise . "'");
                $result2 = $mysqli->query("SELECT * FROM `categories` WHERE `name` = '" . $category . "'");
                $result3 = $mysqli->query("SELECT * FROM `types` WHERE `name` = '" . $type . "'");

                if ($result->num_rows == 1 && $result2->num_rows == 1 && $result3->num_rows == 1) {
                    $user    = $mysqli->real_escape_string(en_crypt($_POST['editenterprise_login']));
                    $pw      = $mysqli->real_escape_string(en_crypt($_POST['editenterprise_pw']));
                    $host    = $mysqli->real_escape_string(en_crypt($_POST['editenterprise_host']));
                    $comment = $mysqli->real_escape_string(en_crypt($_POST['editenterprise_comment']));
                    $mysqli->query("UPDATE `entries` SET `enterprise` = '$enterprise', `category` = '$category', `type` = '$type', `user` = '$user', `password` = '$pw', `url` = '$host', `comment` = '$comment' WHERE `id` = '" . $mysqli->real_escape_string($_GET['id']) . "'");
                }

                $result->close();
                $result2->close();
                $result3->close();
            }
        }

        $result = $mysqli->query("SELECT * FROM `entries` WHERE `id` = '" . $mysqli->real_escape_string($_GET['id']) . "'");

        if ($result->num_rows == 1) {
            $row     = $result->fetch_object();
            $content =
                    "<form method='POST' action='main.php?site=edit&id=$row->id'>
                         <table class='viewtable'>
                         <tr align='center'>
                         <th colspan='2'>
                         <select name='enterprise' id='enterprise'>";

            $content = $content . "<option value='" . rawurlencode($row->enterprise) . "'>$row->enterprise</option>";

            //Lade Firmen
            $result = $mysqli->query("SELECT * FROM enterprises WHERE `name` != '" . $row->enterprise . "' ORDER BY `name`");

            while ($rowe = $result->fetch_object()) {
                $content = $content . "<option value=" . rawurlencode($rowe->name) . ">" . $rowe->name . "</option>";
            }
            $result->close();

            $content = $content .
                    "</select>
                        <select name='category' id='category' onChange='getType(this.value)'>";

            //Erstelle Kategorien Filter
            $content = $content . "<option value='" . rawurlencode($row->category) . "'>$row->category</option>";

            //Lade Kategorien
            $result = $mysqli->query("SELECT * FROM categories WHERE `name` != '" . $row->category . "' ORDER BY `name`");

            while ($rowc = $result->fetch_object()) {
                $content = $content . "<option value=" . rawurlencode($rowc->name) . ">" . $rowc->name . "</option>";
            }
            $result->close();

            //Erstelle Typ Filter
            $content = $content .
                    "</select>
                        <select name='type' id='type'>";

            $content = $content . "<option value='" . rawurlencode($row->type) . "'>" . $row->type . "</option>";


            //Lade Typ Filter
            $result = $mysqli->query("SELECT `name` FROM types WHERE `category` = '" . $row->category . "'");

            while ($rowt = $result->fetch_object()) {
                $content = $content . "<option value=" . rawurlencode($rowt->name) . ">" . $rowt->name . "</option>";
            }
            $result->close();

            //Schließe Filter
            $content = $content .
                    "</select>
                        </th></tr>
                        <tr>
                        <td align='right' class='edit_header'>Host/Url:</td>
                        <td>
                        <input type='text' name='editenterprise_host' size='80' class='edit_inputbox' value='" . de_crypt($row->host) . "'/></td>
                        </tr>
                        <tr>
                        <td align='right' class='edit_header'>Login:</td>
                        <td><input type='text' name='editenterprise_login' size='80' class='edit_inputbox' value='" . de_crypt($row->user) . "'/></td>
                        </tr>
                        <tr>
                        <td align='right' class='edit_header'>Passwort:</td>
                        <td><input type='text' name='editenterprise_pw' size='80' class='edit_inputbox' value='" . de_crypt($row->password) . "'/></td>
                        </tr>
                        <tr>
                        <td align='right' class='edit_header'>Kommentar:</td>
                        <td><textarea type='text' name='editenterprise_comment' size='80' class='edit_inputbox'>" . de_crypt($row->comment) . "</textarea></td>
                        </tr>
                        <tr>
                        <td colspan='2' align ='right'><input type='submit' name='submit' value='Speichern'/></td>
                        </tr>
                        </table>
                        </form>";
        }
    }
}