我是PHP和MySQL的新手，但不是一般的编码。我正在尝试将Access数据库迁移到MySQL。
在提交表单信息并尝试向表中添加记录后，我得到以下错误:
用户'@'localhost'访问数据库'FltLogbook'被拒绝
为了构建表单，我访问数据库以为下拉菜单提取某些值。所有这些都很好。点击"添加条目"按钮并使用Post方法后，出现上述错误。
我很困惑，因为以前的查询运行得很好，但是一旦我尝试"添加"记录，我得到错误。上面的错误似乎是一个匿名连接。顺便说一句，我连接的用户名拥有数据库的所有权限。我试过在代码的表单构建部分内添加该用户名的记录，并且成功了。您将在下面的代码中看到，我已经注释掉了实际的插入代码。我正在对数据类型进行故障排除，并试图简化插入命令，以消除导致错误的其他字段。当前的插入命令代码在代码的表单构建部分工作得很好，所以我知道我有正确的代码，现在我只是要解决连接问题。
在这个网站和谷歌上搜索之后，大多数对上述错误的回应通常涉及授予用户权限。我不认为这是这里的问题，因为我可以在代码的表单构建部分添加记录。似乎我从一个经过身份验证的用户到匿名，因为没有用户名没有在错误中传递。我在代码的两个部分都使用了connection_status()，它返回0 (Normal)。
任何帮助都是非常感激的。欢呼,注意
代码:
$conn = mysqli_connect("localhost", $_POST[user], $_POST[password], "FltLogbook");
if ($_POST[op] != "add") {
//Form not shown, show it
$display="<h1>Add Logbook Entry</h1>";
$CnxSt = connection_status();
$display .= "Connection Status: $CnxSt<br><br>";
$display .= "
<form method='"post'" action='"$_SERVER[PHP_SELF]'">
<strong>Details:</strong>
<table border='"1'" width='"520'">
<tr>
<td><input type='"checkbox'" name='"Sim'">Simulator</td>
<td colspan='"2'">SimType: <select name='"SimType'">
<option value='"'"> NA </option>
<option value='"Miltary Visual'"> Military Visual </option>
<option value='"Military Non-Visual'"> Military Non-Visual </option>
<option value='"ATD'"> ATD </option>
<option value='"FTD'"> FTD </option>
<option value='"FFS'"> FFS </option></select></td>
</tr>
<tr>
<td>Date: <input type='"date'" name='"FltDate'"></td>
<td>Aircraft: <select name='"Aircraft'">
<option selected='"selected'" value='"26'">C-172M</option>";
$AcftQuery="SELECT Aircraft.AirKey,Aircraft.Aircraft, Aircraft.ME, Aircraft.Complex, Aircraft.HighPerf
FROM Aircraft";
$AcftResult=mysqli_query($conn, $AcftQuery) or die ("Aircraft Query Failed");
While ($AcftRow=mysqli_fetch_array($AcftResult)) {
$AcftKey=$AcftRow['AirKey'];
$AcftAircraft=$AcftRow['Aircraft'];
$AcftME=$AcftRow['ME'];
$AcftComplex=$AcftRow['Complex'];
$AcftHP=$AcftRow['HighPerf'];
$display .= "<option value='"$AcftKey'"> $AcftAircraft </option>";
}
$display .= "
</select>
</td>
<td>Aircraft ID: <input type='"text'" name='"ID'" size='"8'"></td>
</tr>
<tr>
<td>From: <select name='"From'">
<option selected='"selected'" value='"PVG'">PVG</option>";
$ArfldQuery="SELECT AirfieldID FROM Airfields ORDER BY AirfieldID";
$ArfldResult=mysqli_query($conn, $ArfldQuery) or die ("Airfield Query Failed");
While ($ArfldRow=mysqli_fetch_array($ArfldResult)) {
$Arfld=$ArfldRow['AirfieldID'];
$display .= "<option value='"$Arfld'"> $Arfld </option>";
}
$display .= "
</select>
</td>
<td>To: <select name='"To'">
<option selected='"selected'" value='"PVG'">PVG</option>";
$ArfldQuery="SELECT AirfieldID FROM Airfields ORDER BY AirfieldID";
$ArfldResult=mysqli_query($conn, $ArfldQuery) or die ("Airfield Query Failed");
While ($ArfldRow=mysqli_fetch_array($ArfldResult)) {
$Arfld=$ArfldRow['AirfieldID'];
$display .= "<option value='"$Arfld'"> $Arfld </option>";
}
$display .= "
</select>
</td>
<td>Leg: <select name='"Leg'">
<option value='"1'">1</option>
<option value='"2'">2</option>
<option value='"3'">3</option>
<option value='"4'">4</option>
<option value='"5'">5</option>
<option value='"6'">6</option>
</select>
</td>
</tr>
</table><br>
<strong>Flight Time Info:</strong>
<table border='"1'" width='"520'">
<tr>
<td>TPT: <input type='"text'" name='"TPT'" size='"4'"></td>
<td>PIC: <input type='"text'" name='"PIC'" size='"4'"></td>
<td>SIC: <input type='"text'" name='"SIC'" value='"0.0'" size='"4'"></td>
</tr>
<tr>
<td>Solo: <input type='"text'" name='"Solo'" value='"0.0'" size='"4'"></td>
<td colspan='"2'">Dual Received: <input type='"text'" name='"Dual'" value='"0.0'" size='"4'"></td>
</tr>
<tr>
<td>Cross Country: <input type='"text'" name='"XC'" value='"0.0'" size='"4'"></td>
<td><input type='"checkbox'" name='"FARXCntry'" size='"4'">FAR X-Cntry</td>
<td><input type='"checkbox'" name='"ATPXCntry'" size='"4'">ATP X-Cntry</td>
</tr>
<tr>
<td>Single Engine: <input type='"text'" name='"SE'" size='"4'"></td>
<td>Multiengine: <input type='"text'" name='"ME'" size='"4'"></td>
<td>Night: <input type='"text'" name='"NT'" value='"0.0'" size='"4'"></td>
</tr>
<tr>
<td>Complex: <input type='"text'" name='"Complex'" value='"0.0'" size='"4'"></td>
<td colspan='"2'">High Performance: <input type='"text'" name='"HP'" value='"0.0'" size='"4'"></td>
</tr>
<tr>
<td>Instrument: <input type='"text'" name='"Inst'" value='"0.0'" size='"4'"></td>
<td colspan='"2'">Sim Instrument: <input type='"text'" name='"SimInst'" value='"0.0'" size='"4'"></td>
</tr>
<tr>
<td>Instructor: <input type='"text'" name='"Instructor'" value='"0.0'" size='"4'"></td>
<td>Pre-Post: <input type='"text'" name='"PrePost'" value='"0.0'" size='"4'"></td>
<td>Ground: <input type='"text'" name='"Ground'" value='"0.0'" size='"4'"></td>
</tr>
</table><br>
<strong>Actual Approaches:</strong>
<table border='"1'" width='"520'">
<tr>
<td>Precision: <input type='"text'" name='"PrecAct'" value='"0'" size='"3'"></td>
<td>Non-Precision: <input type='"text'" name='"NonPrecAct'" value='"0'" size='"3'"></td>
</tr>
</table><br>
<strong>Simulated Approaches:</strong>
<table border='"1'" width='"520'">
<tr>
<td>Precision: <input type='"text'" name='"PrecSim'" value='"0'" size='"3'"></td>
<td>Non-Precision: <input type='"text'" name='"NonPrecSim'" value='"0'" size='"3'"></td>
</tr>
</table><br>
<strong>Landings:</strong>
<table border='"1'" width='"520'">
<tr>
<td>Day Landings: <input type='"text'" name='"DayLdg'" size='"3'"></td>
<td>Night Landings: <input type='"text'" name='"NtLdg'" size='"3'"></td>
</tr>
</table><br>
<strong>Remarks:</strong><br>
<textarea name='"Remarks'" rows='"5'" cols='"70'"></textarea>
<input type='"hidden'" name='"op'" value='"add'">
<p><input type='"submit'" name='"submit'" value='"Add Entry'"></p>
</FORM>";
} else if ($_POST[op] == "add") {
if ($_POST[Sim] == "") {
$_POST[Sim] = "0";
} else {
$_POST[Sim] = "1";
}
if ($_POST[FARXCntry] == "") {
$_POST[FARXCntry] = "0";
} else {
$_POST[FARXCntry] = "1";
}
if ($_POST[ATPXCntry] == "") {
$_POST[ATPXCntry] = "0";
} else {
$_POST[ATPXCntry] = "1";
}
// $add_flt = "INSERT INTO FlightData (Date, MakeModel, AircraftID, Simulator, SimType, AfldFrom, AfldTo,
// Leg, TPT, PIC, SIC, Solo, Dual, Night, XCntry, SE, ME, Complex, HighPerf, Inst_Act, Inst_Sim,
// Instructor, PrePost, Ground, Prec_Act, Prec_Sim, NonPrec_Act, NonPrec_Sim, DCL, NCL,
// FAR_XCntry, ATP_XCntry, Remarks)
// VALUES ('$_POST[FltDate]', '$_POST[Aircraft]', '$_POST[ID],$_POST[Sim]', '$_POST[SimType]', '$_POST[From]',
// '$_POST[To]', '$_POST[Leg]', '$_POST[TPT]', '$_POST[PIC]', '$_POST[SIC]', '$_POST[Solo]', '$_POST[Dual]',
// '$_POST[NT]', '$_POST[XC]', '$_POST[SE]', '$_POST[ME]', '$_POST[Complex]', '$_POST[HP]', '$_POST[Inst]',
// '$_POST[SimInst]', '$_POST[Instructor]', '$_POST[PrePost]', '$_POST[Ground]', '$_POST[PrecAct]',
// '$_POST[PrecSim]', '$_POST[NonPrecAct]', '$_POST[NonPreSim]', '$_POST[DayLdg]', '$_POST[NtLdg]',
// '$_POST[FARXCntry]', '$_POST[ATPXCntry]', '$_POST[Remarks]')";
$add_flt = "INSERT INTO FlightData (Date, MakeModel) VALUES ('$_POST[FltDate]', '$_POST[Aircraft]')";
mysqli_query($conn, $add_flt) or die('Error: '. mysqli_connect_error());
$display = "<h1>Entry Added</h1>
<p>Your entry was added.</p><br>
<p>$_POST[FltDate] | $_POST[Aircraft] </p>";
// $CnxSt = connection_status();
// $display .= "Connection Status: $CnxSt<br><br>";
// $display .= "$user / $pwd<br>$add_flt<br>";
// $display .= "$_POST[FltDate] / $_POST[Aircraft] / $_POST[ID] / $_POST[Sim] / $_POST[FARXCntry] / $_POST[ATPXCntry]";
}
?>
<html>
<head>
<title>Add Logbook Entry></title>
</head>
<body>
<?php echo $display; ?>
</body>
</html>
你必须在第一行检查你的mysql用户名和密码
如果username="root" &密码为空，则
$康涅狄格州= mysqli_connect("localhost","根",","FltLogbook");