1

我有一个带有表“Telefoonnummers”的数据库“Telefoon”。该表具有“naam”、“number”和“mobiel”列

我正在尝试制作一个可以更新记录的 .php 页面。我很确定这是正确的，但不知何故没有任何改变。

在这里您填写更新的记录，当您单击按钮时，它会转到更新它的下一页。

<!DOCTYPE HMTL>
<html>

<head>
    <title>Wijzigen telefoonnummer</title>
</head>

<body>

    <?php

        $record_name = $_GET["naam"];

        $user = "root";
        $pass = "root";

        $dbh = new PDO(
            'mysql:host=localhost; port=8473; dbname=telefoon',
            $user,
            $pass
        );

        $sth = $dbh -> prepare("

            SELECT *
            FROM Telefoonnummers
            WHERE naam = :record_name

        ");

        $sth -> bindValue( ":record_name", $record_name, PDO::PARAM_STR );

        $sth -> execute();

        $printRecord = $sth -> fetchAll(PDO::FETCH_ASSOC);

        /*
        //dit record als array weergeven
        print("<pre>");
        print_r($printRecord);
        print("</pre>");
        */

        //gegevens in variabelen zetten
        $printRecordRecord = $printRecord[0];
        $huidigeNaam = $printRecordRecord["naam"];
        $huidigeNummer = $printRecordRecord["telefoonnummer"];
        $huidigeMobiel = $printRecordRecord["mobiel"];

        //niet meer nodig door bovenstaande
        /*
        foreach( $printRecord AS $printRecordIndex => $printRecordRecord ) {

            $huidigeNaam = $printRecordRecord["naam"];
            $huidigeNummer = $printRecordRecord["telefoonnummer"];
            $huidigeMobiel = $printRecordRecord["mobiel"];

        }
        */

        print("

            <form action='wijzig.php' method='POST'>
                <table>

                    <tr>
                        <td bgcolor='green'><b>Naam</b></td>
                        <td bgcolor='green'><b>Telefoonnummer</b></td>
                        <td bgcolor='green'><b>Mobiel</b></td>
                        <td bgcolor='green'></td>
                    </tr>

                    <tr>
                        <td><input type='text' name='naam' value='$huidigeNaam' disabled='TRUE' /></td>
                        <td><input type='text' name='nummer' value='$huidigeNummer' /></td>
                        <td><input type='text' name='mobiel' value='$huidigeMobiel' /></td>
                        <td><input type='submit' value='Wijzig' /></td>
                    </tr>

                </table>
            </form>

        ");

    ?>

</body>

这是实际更改（至少这是我想要的）记录的下一页：

<!DOCTYPE HTML>
<html>

<head>
    <title>Gewijzigd</title>
</head>

<body>

    <?php

        //geupdate gegevens ophalen
        $newNaam = $_POST["naam"];
        $newNumber = $_POST["nummer"];
        $newMobile = $_POST["mobiel"];

        //gegevens updaten als ALLES is ingevuld
        if ( ($newNaam != "") && ($newNumber != "") && ($newMobile != "") ) {

            $user = "root";
            $pass = "root";

            $dhb = new PDO(
                'mysql:host=localhost; port=8473; dbname=telefoon',
                $user,
                $pass
            );

            $sth = $dbh -> prepare("

                UPDATE Telefoonnummers
                SET naam = :naam,
                telefoonnummer = :nummer,
                mobiel = :mobiel
                WHERE naam = :naam

            ");

            $sth -> bindValue( ":naam", $newNaam, PDO::PARAM_STR );
            $sth -> bindValue( ":telefoonnummer", $newNumber, PDO::PARAM_STR );
            $sth -> bindValue( ":mobiel", $newMobile, PDO::PARAM_STR );

            $sth -> execute();

            $sthCheck = $dbh -> prepare("

                SELECT *
                FROM Telefoonnummers
                WHERE naam = :naam

            ");

            $sthCheck -> bindValue( ":naam", $newNaam, PDO::PARAM_STR );

            $sthCheck -> execute();

        }

    ?>

</body>

这有什么问题？

4

1 回答 1

1

我使用您的代码设置了快速测试页面。我发现有两件事不能正常工作。

  1. 初始表单- “naam”字段在表单中被禁用。这意味着该参数不会进入 Wijzig.php 页面。由于“naam”始终为空 - 因此等于“” - 它不会超过您的 if 语句。为了让它工作，我重新启用了第一个表单中的“naam”字段。
  2. UPDATE 语句中的参数- 在您的 UPDATE 语句中，它试图访问一个名为 ":telefoonnummer" 的参数，但在参数中使用了 ":nummer"。这将导致 PDO 在执行时抛出异常。

快速说明- 我在 wijzig.php 中添加了一个 echo 语句，以便成功运行会产生某种可见的结果。

这样，我将这两个文件更新为：

索引.php

<head>
<title>Wijzigen telefoonnummer</title>
</head>

<body>

<?php

    $record_name = $_GET["naam"];

    $user = "root";
    $pass = "root";

    $dbh = new PDO(
        'mysql:host=localhost; port=8473; dbname=telefoon',
        $user,
        $pass
    );

    echo $record_name;

    $sth = $dbh -> prepare("

        SELECT *
        FROM Telefoonnummers
        WHERE naam = :record_name

    ");

    $sth -> bindValue( ":record_name", $record_name, PDO::PARAM_STR );

    $sth -> execute();

    $printRecord = $sth -> fetchAll(PDO::FETCH_ASSOC);

    /*
    //dit record als array weergeven
    print("<pre>");
    print_r($printRecord);
    print("</pre>");
    */

    //gegevens in variabelen zetten
    $printRecordRecord = $printRecord[0];
    $huidigeNaam = $printRecordRecord["naam"];
    $huidigeNummer = $printRecordRecord["telefoonnummer"];
    $huidigeMobiel = $printRecordRecord["mobiel"];

    //niet meer nodig door bovenstaande
    /*
    foreach( $printRecord AS $printRecordIndex => $printRecordRecord ) {

        $huidigeNaam = $printRecordRecord["naam"];
        $huidigeNummer = $printRecordRecord["telefoonnummer"];
        $huidigeMobiel = $printRecordRecord["mobiel"];

    }
    */

    print("

        <form action='wijzig.php' method='POST'>
            <table>

                <tr>
                    <td bgcolor='green'><b>Naam</b></td>
                    <td bgcolor='green'><b>Telefoonnummer</b></td>
                    <td bgcolor='green'><b>Mobiel</b></td>
                    <td bgcolor='green'></td>
                </tr>

                <tr>
                    <td><input type='text' name='naam' value='$huidigeNaam'/></td>
                    <td><input type='text' name='nummer' value='$huidigeNummer' /></td>
                    <td><input type='text' name='mobiel' value='$huidigeMobiel' /></td>
                    <td><input type='submit' value='Wijzig' /></td>
                </tr>

            </table>
        </form>

    ");

?>

</body>

wijzig.php

<head>
<title>Gewijzigd</title>
</head>

<body>

<?php

    //geupdate gegevens ophalen
    $newNaam = $_POST["naam"];
    $newNumber = $_POST["nummer"];
    $newMobile = $_POST["mobiel"];

    //gegevens updaten als ALLES is ingevuld
    if ( ($newNaam != "") && ($newNumber != "") && ($newMobile != "") ) {

        $user = "root";
        $pass = "root";

        $dbh = new PDO(
        'mysql:host=localhost; port=8473; dbname=telefoon',
        $user,
        $pass
    );

        $sth = $dbh -> prepare("

            UPDATE Telefoonnummers
            SET naam = :naam,
            telefoonnummer = :nummer,
            mobiel = :mobiel
            WHERE naam = :naam

        ");

        $sth -> bindValue( ":naam", $newNaam, PDO::PARAM_STR );
        $sth -> bindValue( ":nummer", $newNumber, PDO::PARAM_STR );
        $sth -> bindValue( ":mobiel", $newMobile, PDO::PARAM_STR );

        $sth -> execute();

        $sthCheck = $dbh -> prepare("

            SELECT *
            FROM Telefoonnummers
            WHERE naam = :naam

        ");

        $sthCheck -> bindValue( ":naam", $newNaam, PDO::PARAM_STR );

        echo "Number of records changed: ".$sthCheck -> execute();

    }

?>

</body>

当针对现有记录运行时，它会产生以下输出：

更改的记录数：1

于 2013-10-15T22:22:47.097 回答