PHP致命错误:未捕获错误:在bool上调用成员函数fetch_assoc()

时间:2019-07-10 18:37:16

标签: php mysql database mysqli

<html>
<head>
    <link href='http://fonts.googleapis.com/css?family=Source+Sans+Pro:300,400,700' rel='stylesheet' type='text/css'>
    <link rel="stylesheet" href="css/memberpage.css">
    <link rel="stylesheet" href="css/formular.css">
    <meta charset="utf-8">
    <title>Snapfinder - Startseite</title>
</head>
<?php
require('includes/config.php');
//if not logged in redirect to login page
if(!$user->is_logged_in()){ header('Location: login.php'); exit(); }
//define page title
$title = 'Snapfinder - Startseite';
//include header template
require('layout/headermember.php');
?>
<br>
<br>
<?php
echo "<body style=\"background-color: #2F4F4F; \">";
?>
        <!-- Wilkommens Nachricht -->
<br
<div class="container2">
    <div class="row">
        <div class="col-xs-12 col-sm-8 col-md-6 col-sm-offset-2 col-md-offset-3">
                <h2> Hey <?php echo htmlspecialchars($_SESSION['username'], ENT_QUOTES); ?>!</h2>
                <h2> Nach welchen Nutzer suchst du? </h2>
                <!-- Trenn Strich -->
                <hr>
<style>
h2 {
    color: #F9F6F6;
}
body {
 font-family: Verdana, Sans-Serif;
 font-size: 1rem;
}
form {
    color: #000000;
 width: 410px;
 padding: 10px;
 margin: Auto;
}
.ftext {
    color: #000000;
}
.wtext {
    color: black;
}
</style>
<body>
<h1>Nach Users suchen</h1>
<form action="memberpage.php" method="post">
    <table border="1" cellpadding="20">
        <tr>
            <td>
                  <h2>Alter</h2>
                  <p>von <input name="alterMin"> bis <input name="alterMax"> €</p>
            </td>
        </tr>
        <tr>
            <td>
                  <h2>Bundesland:</h2>
                  <p>
                    <select name="bundesland">
                        <option value="alle">Alle</option>
                        <option value="1">Baden-Württemberg</option>
                        <option value="2">Bayern</option>
                        <option value="3">Berlin</option>
                                                <option value="4">Brandenburg</option>
                                                <option value="5">Bremen</option>
                                                <option value="6">Hamburg</option>
                                                <option value="7">Hessen</option>
                                                <option value="8">Mecklenburg-Vorpommern</option>
                                                <option value="9">Niedersachsen</option>
                                                <option value="10">Nordrhein-Westfalen</option>
                                                <option value="11">Rheinland-Pfalz</option>
                                                <option value="12">Saarland</option>
                                                <option value="13">Sachsen</option>
                                                <option value="14">Sachsen-Anhalt</option>
                                                <option value="15">Schleswig-Holstein</option>
                                                <option value="16">Thüringen</option>
                    </select>
                  </p>
            </td>
            <td>
                  <h2>Geschlecht:</h2>
                  <p>
                      <input type="radio" name="geschlecht" value="M" checked="checked"> Männlich<br>
                      <input type="radio" name="geschlecht" value="W" > Weiblich<br>
                  </p>
            </td>
        </tr>
                <td>
                            <h2>Mit Profilbild?:</h2>
                            <p>
                                    <input type="radio" name="avatarID" value="1" checked="checked"> Ja<br>
                                    <input type="radio" name="avatarID" value="2" > Nein<br>
                            </p>
                </td>
        </tr>
    </table>
    <input style="margin-top: 25px" type="submit" value="Suche starten">
</form>
</body>
</html>
<?php
//Mit MySQL-Datenbank verbinden
$host_name = 'localhost';
$user_name = 'root';
$password = '';
$database = 'db';
$connect = mysqli_connect($host_name, $user_name, $password, $database);
$abfrage ="SELECT * FROM `members` WHERE nr > 0";
// Suche nach Alter
$alterMin = 16;
$alterMax = 100;
if ( isset($_POST["alterMin"]) ) {
echo $_POST["alterMin"];
   $alterMin = $_POST["alterMin"];
   $abfrage .= " AND alter > $alterMin";
}
if ( isset($_POST["alterMin"]) ) {
echo $_POST["alterMax"];
   $alterMax = $_POST["alterMax"];
   $abfrage .= " AND alter < $alterMax";
}
//Suche nach bundesland
$Min = 0;
$Max = 16;
switch (isset ($_POST["bundesland"])){;
   case "alle": //tu nichts
   break; //verlassen

   case "Baden-Württemberg":
   $Min = 1;
   $Max = 1;
   break;

    case "Bayern":
    $Min = 2;
    $Max = 2;
    break;

    case "Berlin":
    $Min = 3;
    $Max = 3;
    break;

        case "Brandenburg":
        $Min = 4;
        $Max = 4;
        break;

        case "Bremen":
        $Min = 5;
        $Max = 5;
        break;

        case "Hamburg":
        $Min = 6;
        $Max = 6;
        break;

        case "Hessen":
        $Min = 7;
        $Max = 7;
        break;

        case "Mecklenburg-Vorpommern":
        $Min = 8;
        $Max = 8;
        break;

        case "Niedersachsen":
        $Min = 9;
        $Max = 9;
        break;

        case "Nordrhein-Westfalen":
        $Min = 10;
        $Max = 10;
        break;

        case "Rheinland-Pfalz":
        $Min = 11;
        $Max = 11;
        break;

        case "Saarland":
        $Min = 12;
        $Max = 12;
        break;

        case "Sachsen":
        $Min = 13;
        $Max = 13;
        break;

        case "Sachsen-Anhalt":
        $Min = 14;
        $Max = 14;
        break;

        case "Schleswig-Holstein":
        $Min = 15;
        $Max = 15;
        break;

        case "Thüringen":
        $Min = 16;
        $Nax = 16;
        break;
}
$abfrage .= " AND bundesland > $Min AND bundesland < $Max";
//Suche nach Geschlecht
if ( isset($_POST["geschlecht"]) ) {
echo $_POST["geschlecht"] == "M";
   $abfrage .= " AND geschlecht = M";
}
if ( isset($_POST["geschlecht"]) ) {
echo $_POST["geschlecht"] == "W";
   $abfrage .= " AND geschlecht = W";
}
if ( isset($_POST["avatarID"]) ) {
echo $_POST["avatarID"] == "1";
   $abfrage .= " AND avatarID = 1";
}
if ( isset($_POST["avatarID"]) ) {
echo $_POST["avatarID"] == "2";
   $abfrage .= " AND avatarID = 2";
}
//Abfrage zu Testzwecken am Bildschirm ausgeben
//echo $abfrage;
//SQL-Abfrage ausführen
$result = mysqli_query($connect, $abfrage);
//Ergebnis am Bildschirm ausgeben
echo  "<h1>Users:</h1>
<table border='1'><th>Alter</th><th>Bundesland</th><th>Geschlecht</th><th>Profilbild</th>";
while ($dsatz = $result->fetch_assoc()){
echo "<tr>
<td>" . $dsatz["alter"] . "</td>
<td>" . $dsatz["bundesland"] . "</td>
<td>" . $dsatz["geschlecht"] . "</td>
<td>" . $dsatz["profilbild"] . "</td>
</tr>";
}
echo "</table>";
// Verbindung trennen:
 mysqli_close($connect);
?>
<?php
//include header template
require('layout/footer.php');
?>

您好社区,我的网站有问题 我想编写一个可以用不同条件设置的搜索。

但不幸的是,我得到了此错误代码,谷歌我没有找到任何可以进一步帮助我的东西

我是PHP的初学者,为我的英语不好而道歉

也许可以帮助我,谢谢 错误代码 致命错误:未捕获错误:在C:\ xampp \ htdocs \ memberpage.php:242中的bool上调用成员函数fetch_assoc()堆栈跟踪:#0 {main}在C:\ xampp \ htdocs \ memberpage.php中抛出242行

搜索也没有我不理解的功能 只是行不通,我不知道还有什么我希望你能帮助我..谢谢!

0 个答案:

没有答案
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