使用Navicat工具除錯mysql資料庫很方便，因為老的http連線mysql的程式碼僅支援 mysql_connect，但新的PHP已經不支援此函數了。
在網上找的新方法，使用 mysqli_connect 替代。

1. 將 ntunnel_mysql.php 放網站可訪問目錄
2. 使用瀏覽器測試訪問 http://www.z1.com/ntunnel_mysql.php
3. 配置Navicat使用http連線mysql，如下圖:

ntunnel_mysql.php 程式碼如下：

<?php    //version my202

/// zjfree 使用mysqli代理Navicat
const
 
 USER_ACCOUNT = 'admin';
const USER_PASSWORD = '111111';

// 檢測使用者授權
function check()
{
    if (!isset($_SERVER['PHP_AUTH_USER'])) {
        header('WWW-Authenticate: Basic realm="My Realm"');
        header('HTTP/1.0 401 Unauthorized');
        //             echo 'Text to send if user hits Cancel button';
 

        exit;
    }

    if (!($_SERVER['PHP_AUTH_USER'] == USER_ACCOUNT &&  $_SERVER['PHP_AUTH_PW'] == USER_PASSWORD)) {
        exit;
    }
}

check();

//set allowTestMenu to false to disable System/Server test page
$allowTestMenu = true;

$use_mysqli = function_exists("mysqli_connect");

header
 
("Content-Type: text/plain; charset=x-user-defined");
error_reporting(0);
set_time_limit(0);

function phpversion_int()
{
    list($maVer, $miVer, $edVer) = preg_split("(/|\.|-)", phpversion());
    return $maVer * 10000 + $miVer * 100 + $edVer;
}

if (phpversion_int() < 50300) {
    set_magic_quotes_runtime(0);
}

function GetLongBinary($num)
{
    return pack("N", $num);
}

function GetShortBinary($num)
{
    return pack("n", $num);
}

function GetDummy($count)
{
    $str = "";
    for ($i = 0; $i < $count; $i++)
        $str .= "\x00";
    return $str;
}

function GetBlock($val)
{
    $len = strlen($val);
    if ($len < 254)
        return chr($len) . $val;
    else
        return "\xFE" . GetLongBinary($len) . $val;
}

function EchoHeader($errno)
{
    $str = GetLongBinary(1111);
    $str .= GetShortBinary(202);
    $str .= GetLongBinary($errno);
    $str .= GetDummy(6);
    echo $str;
}

function EchoConnInfo($conn)
{
    if ($GLOBALS['use_mysqli']) {
        $str = GetBlock(mysqli_get_host_info($conn));
        $str .= GetBlock(mysqli_get_proto_info($conn));
        $str .= GetBlock(mysqli_get_server_info($conn));
        echo $str;
    } else {
        $str = GetBlock(mysql_get_host_info($conn));
        $str .= GetBlock(mysql_get_proto_info($conn));
        $str .= GetBlock(mysql_get_server_info($conn));
        echo $str;
    }
}

function EchoResultSetHeader($errno, $affectrows, $insertid, $numfields, $numrows)
{
    $str = GetLongBinary($errno);
    $str .= GetLongBinary($affectrows);
    $str .= GetLongBinary($insertid);
    $str .= GetLongBinary($numfields);
    $str .= GetLongBinary($numrows);
    $str .= GetDummy(12);
    echo $str;
}

function EchoFieldsHeader($res, $numfields)
{
    $str = "";
    for ($i = 0; $i < $numfields; $i++) {
        if ($GLOBALS['use_mysqli']) {
            $finfo = mysqli_fetch_field_direct($res, $i);
            $str .= GetBlock($finfo->name);
            $str .= GetBlock($finfo->table);

            $type = $finfo->type;
            $length = $finfo->length;

            $str .= GetLongBinary($type);

            $intflag = $finfo->flags;
            $str .= GetLongBinary($intflag);

            $str .= GetLongBinary($length);
        } else {
            $str .= GetBlock(mysql_field_name($res, $i));
            $str .= GetBlock(mysql_field_table($res, $i));

            $type = mysql_field_type($res, $i);
            $length = mysql_field_len($res, $i);
            switch ($type) {
                case "int":
                    if ($length > 11) $type = 8;
                    else $type = 3;
                    break;
                case "real":
                    if ($length == 12) $type = 4;
                    elseif ($length == 22) $type = 5;
                    else $type = 0;
                    break;
                case "null":
                    $type = 6;
                    break;
                case "timestamp":
                    $type = 7;
                    break;
                case "date":
                    $type = 10;
                    break;
                case "time":
                    $type = 11;
                    break;
                case "datetime":
                    $type = 12;
                    break;
                case "year":
                    $type = 13;
                    break;
                case "blob":
                    if ($length > 16777215) $type = 251;
                    elseif ($length > 65535) $type = 250;
                    elseif ($length > 255) $type = 252;
                    else $type = 249;
                    break;
                default:
                    $type = 253;
            }
            $str .= GetLongBinary($type);

            $flags = explode(" ", mysql_field_flags($res, $i));
            $intflag = 0;
            if (in_array("not_null", $flags)) $intflag += 1;
            if (in_array("primary_key", $flags)) $intflag += 2;
            if (in_array("unique_key", $flags)) $intflag += 4;
            if (in_array("multiple_key", $flags)) $intflag += 8;
            if (in_array("blob", $flags)) $intflag += 16;
            if (in_array("unsigned", $flags)) $intflag += 32;
            if (in_array("zerofill", $flags)) $intflag += 64;
            if (in_array("binary", $flags)) $intflag += 128;
            if (in_array("enum", $flags)) $intflag += 256;
            if (in_array("auto_increment", $flags)) $intflag += 512;
            if (in_array("timestamp", $flags)) $intflag += 1024;
            if (in_array("set", $flags)) $intflag += 2048;
            $str .= GetLongBinary($intflag);

            $str .= GetLongBinary($length);
        }
    }
    echo $str;
}

function EchoData($res, $numfields, $numrows)
{
    for ($i = 0; $i < $numrows; $i++) {
        $str = "";
        $row = null;
        if ($GLOBALS['use_mysqli'])
            $row = mysqli_fetch_row($res);
        else
            $row = mysql_fetch_row($res);
        for ($j = 0; $j < $numfields; $j++) {
            if (is_null($row[$j]))
                $str .= "\xFF";
            else
                $str .= GetBlock($row[$j]);
        }
        echo $str;
    }
}


function doSystemTest()
{
    function output($description, $succ, $resStr)
    {
        echo "<tr><td class=\"TestDesc\">$description</td><td ";
        echo ($succ) ? "class=\"TestSucc\">$resStr[0]</td></tr>" : "class=\"TestFail\">$resStr[1]</td></tr>";
    }
    output("PHP version >= 4.0.5", phpversion_int() >= 40005, array("Yes", "No"));
    output("mysql_connect() available", function_exists("mysql_connect"), array("Yes", "No"));
    output("mysqli_connect() available", function_exists("mysqli_connect"), array("Yes", "No"));
    if (phpversion_int() >= 40302 && substr($_SERVER["SERVER_SOFTWARE"], 0, 6) == "Apache" && function_exists("apache_get_modules")) {
        if (in_array("mod_security2", apache_get_modules()))
            output("Mod Security 2 installed", false, array("No", "Yes"));
    }
}

/////////////////////////////////////////////////////////////////////////////
////

if (phpversion_int() < 40005) {
    EchoHeader(201);
    echo GetBlock("unsupported php version");
    exit();
}

if (phpversion_int() < 40010) {
    global $HTTP_POST_VARS;
    $_POST = &$HTTP_POST_VARS;
}

if (!isset($_POST["actn"]) || !isset($_POST["host"]) || !isset($_POST["port"]) || !isset($_POST["login"])) {
    $testMenu = $allowTestMenu;
    if (!$testMenu) {
        EchoHeader(202);
        echo GetBlock("invalid parameters");
        exit();
    }
}

if (!$testMenu) {
    if ($_POST["encodeBase64"] == '1') {
        for ($i = 0; $i < count($_POST["q"]); $i++)
            $_POST["q"][$i] = base64_decode($_POST["q"][$i]);
    }

    if (!function_exists("mysql_connect") && !function_exists("mysqli_connect")) {
        EchoHeader(203);
        echo GetBlock("MySQL not supported on the server");
        exit();
    }

    $errno_c = 0;
    $hs = $_POST["host"];
    if ($use_mysqli) {
        if ($_POST["port"])
            $conn = mysqli_connect($hs, $_POST["login"], $_POST["password"], '', $_POST["port"]);
        else
            $conn = mysqli_connect($hs, $_POST["login"], $_POST["password"]);
        $errno_c = mysqli_connect_errno($conn);
        if (phpversion_int() >= 50005) {  // for unicode database name
            mysqli_set_charset($conn, 'UTF8');
        }
        if ($errno_c > 0) {
            EchoHeader($errno_c);
            echo GetBlock(mysqli_connect_error($conn));
            exit;
        }

        if (($errno_c <= 0) && ($_POST["db"] != "")) {
            $res = mysqli_select_db($conn, $_POST["db"]);
            $errno_c = mysqli_errno($conn);
        }

        EchoHeader($errno_c);
        if ($errno_c > 0) {
            echo GetBlock(mysqli_error($conn));
        } elseif ($_POST["actn"] == "C") {
            EchoConnInfo($conn);
        } elseif ($_POST["actn"] == "Q") {
            for ($i = 0; $i < count($_POST["q"]); $i++) {
                $query = $_POST["q"][$i];
                if ($query == "") continue;
                if (phpversion_int() < 50400) {
                    if (get_magic_quotes_gpc())
                        $query = stripslashes($query);
                }
                $res = mysqli_query($conn, $query);
                $errno = mysqli_errno($conn);
                $affectedrows = mysqli_affected_rows($conn);
                $insertid = mysqli_insert_id($conn);
                if (false !== $res) {
                    $numfields = mysqli_field_count($conn);
                    $numrows = mysqli_num_rows($res);
                } else {
                    $numfields = 0;
                    $numrows = 0;
                }
                EchoResultSetHeader($errno, $affectedrows, $insertid, $numfields, $numrows);
                if ($errno > 0)
                    echo GetBlock(mysqli_error($conn));
                else {
                    if ($numfields > 0) {
                        EchoFieldsHeader($res, $numfields);
                        EchoData($res, $numfields, $numrows);
                    } else {
                        if (phpversion_int() >= 40300)
                            echo GetBlock(mysqli_info($conn));
                        else
                            echo GetBlock("");
                    }
                }
                if ($i < (count($_POST["q"]) - 1))
                    echo "\x01";
                else
                    echo "\x00";
                if (false !== $res)
                    mysqli_free_result($res);
            }
        }
    } else {
        if ($_POST["port"]) $hs .= ":" . $_POST["port"];
        $conn = mysql_connect($hs, $_POST["login"], $_POST["password"]);
        $errno_c = mysql_errno();
        if (phpversion_int() >= 50203) {  // for unicode database name
            mysql_set_charset('UTF8', $conn);
        }
        if (($errno_c <= 0) && ($_POST["db"] != "")) {
            $res = mysql_select_db($_POST["db"], $conn);
            $errno_c = mysql_errno();
        }

        EchoHeader($errno_c);
        if ($errno_c > 0) {
            echo GetBlock(mysql_error());
        } elseif ($_POST["actn"] == "C") {
            EchoConnInfo($conn);
        } elseif ($_POST["actn"] == "Q") {
            for ($i = 0; $i < count($_POST["q"]); $i++) {
                $query = $_POST["q"][$i];
                if ($query == "") continue;
                if (phpversion_int() < 50400) {
                    if (get_magic_quotes_gpc())
                        $query = stripslashes($query);
                }
                $res = mysql_query($query, $conn);
                $errno = mysql_errno();
                $affectedrows = mysql_affected_rows($conn);
                $insertid = mysql_insert_id($conn);
                $numfields = mysql_num_fields($res);
                $numrows = mysql_num_rows($res);
                EchoResultSetHeader($errno, $affectedrows, $insertid, $numfields, $numrows);
                if ($errno > 0)
                    echo GetBlock(mysql_error());
                else {
                    if ($numfields > 0) {
                        EchoFieldsHeader($res, $numfields);
                        EchoData($res, $numfields, $numrows);
                    } else {
                        if (phpversion_int() >= 40300)
                            echo GetBlock(mysql_info($conn));
                        else
                            echo GetBlock("");
                    }
                }
                if ($i < (count($_POST["q"]) - 1))
                    echo "\x01";
                else
                    echo "\x00";
                mysql_free_result($res);
            }
        }
    }
    exit();
}

header("Content-Type: text/html");
////
/////////////////////////////////////////////////////////////////////////////
?>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>

<head>
    <title>Navicat HTTP Tunnel Tester</title>
    <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
    <style type="text/css">
        body {
            margin: 30px;
            font-family: Tahoma;
            font-weight: normal;
            font-size: 14px;
            color: #222222;
        }

        table {
            width: 100%;
            border: 0px;
        }

        input {
            font-family: Tahoma, sans-serif;
            border-style: solid;
            border-color: #666666;
            border-width: 1px;
        }

        fieldset {
            border-style: solid;
            border-color: #666666;
            border-width: 1px;
        }

        .Title1 {
            font-size: 30px;
            color: #003366;
        }

        .Title2 {
            font-size: 10px;
            color: #999966;
        }

        .TestDesc {
            width: 70%
        }

        .TestSucc {
            color: #00BB00;
        }

        .TestFail {
            color: #DD0000;
        }

        .mysql {}

        .pgsql {
            display: none;
        }

        .sqlite {
            display: none;
        }

        #page {
            max-width: 42em;
            min-width: 36em;
            border-width: 0px;
            margin: auto auto;
        }

        #host,
        #dbfile {
            width: 300px;
        }

        #port {
            width: 75px;
        }

        #login,
        #password,
        #db {
            width: 150px;
        }

        #Copyright {
            text-align: right;
            font-size: 10px;
            color: #888888;
        }
    </style>
    <script type="text/javascript">
        function getInternetExplorerVersion() {
            var ver = -1;
            if (navigator.appName == "Microsoft Internet Explorer") {
                var regex = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
                if (regex.exec(navigator.userAgent))
                    ver = parseFloat(RegExp.$1);
            }
            return ver;
        }

        function setText(element, text, succ) {
            element.className = (succ) ? "TestSucc" : "TestFail";
            element.innerHTML = text;
        }

        function getByteAt(str, offset) {
            return str.charCodeAt(offset) & 0xff;
        }

        function getIntAt(binStr, offset) {
            return (getByteAt(binStr, offset) << 24) +
                (getByteAt(binStr, offset + 1) << 16) +
                (getByteAt(binStr, offset + 2) << 8) +
                (getByteAt(binStr, offset + 3) >>> 0);
        }

        function getBlockStr(binStr, offset) {
            if (getByteAt(binStr, offset) < 254)
                return binStr.substring(offset + 1, offset + 1 + binStr.charCodeAt(offset));
            else
                return binStr.substring(offset + 5, offset + 5 + getIntAt(binStr, offset + 1));
        }

        function doServerTest() {
            var version = getInternetExplorerVersion();
            if (version == -1 || version >= 9.0) {
                var xmlhttp = (window.XMLHttpRequest) ? new XMLHttpRequest() : xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");

                xmlhttp.onreadystatechange = function() {
                    var outputDiv = document.getElementById("ServerTest");
                    if (xmlhttp.readyState == 4) {
                        if (xmlhttp.status == 200) {
                            var errno = getIntAt(xmlhttp.responseText, 6);
                            if (errno == 0)
                                setText(outputDiv, "Connection Success!", true);
                            else
                                setText(outputDiv, parseInt(errno) + " - " + getBlockStr(xmlhttp.responseText, 16), false);
                        } else
                            setText(outputDiv, "HTTP Error - " + xmlhttp.status, false);
                    }
                }

                var params = "";
                var form = document.getElementById("TestServerForm");
                for (var i = 0; i < form.elements.length; i++) {
                    if (i > 0) params += "&";
                    params += form.elements[i].id + "=" + form.elements[i].value.replace("&", "%26");
                }

                document.getElementById("ServerTest").className = "";
                document.getElementById("ServerTest").innerHTML = "Connecting...";
                xmlhttp.open("POST", "", true);
                xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
                xmlhttp.setRequestHeader("Content-length", params.length);
                xmlhttp.setRequestHeader("Connection", "close");
                xmlhttp.send(params);
            } else {
                document.getElementById("ServerTest").className = "";
                document.getElementById("ServerTest").innerHTML = "Internet Explorer " + version + " is not supported, please use Internet explorer 9.0 or above, firefox, chrome or safari";
            }
        }
    </script>
</head>

<body>
    <div id="page">
        <p>
            <font class="Title1">Navicat&trade;</font><br>
            <font class="Title2">The gateway to your database!</font>
        </p>
        <fieldset>
            <legend>System Environment Test</legend>
            <table>
                <tr style="<?php echo "display:none"; ?>">
                    <td width=70%>PHP installed properly</td>
                    <td class="TestFail">No</td>
                </tr>
                <?php echo doSystemTest(); ?>
            </table>
        </fieldset>
        <br>
        <fieldset>
            <legend>Server Test</legend>
            <form id="TestServerForm" action="#" onSubmit="return false;">
                <input type=hidden id="actn" value="C">
                <table>
                    <tr class="mysql">
                        <td width="35%">Hostname/IP Address:</td>
                        <td><input type=text id="host" placeholder="localhost"></td>
                    </tr>
                    <tr class="mysql">
                        <td>Port:</td>
                        <td><input type=text id="port" placeholder="3306"></td>
                    </tr>
                    <tr class="pgsql">
                        <td>Initial Database:</td>
                        <td><input type=text id="db" placeholder="template1"></td>
                    </tr>
                    <tr class="mysql">
                        <td>Username:</td>
                        <td><input type=text id="login" placeholder="root"></td>
                    </tr>
                    <tr class="mysql">
                        <td>Password:</td>
                        <td><input type=password id="password" placeholder=""></td>
                    </tr>
                    <tr class="sqlite">
                        <td>Database File:</td>
                        <td><input type=text id="dbfile" placeholder="sqlite.db"></td>
                    </tr>
                    <tr>
                        <td></td>
                        <td><br><input id="TestButton" type="submit" value="Test Connection" onClick="doServerTest()"></td>
                    </tr>
                </table>
            </form>
            <div id="ServerTest"><br></div>
        </fieldset>
        <p id="Copyright">Copyright &copy; PremiumSoft &trade; CyberTech Ltd. All Rights Reserved.</p>
    </div>
</body>

</html>