Question

我想从一个表中的一列中检索每一行，并将它们全部放在一个元素中。我现在几乎在黑暗中挣扎，我做错了什么/失踪了？

$db_connect = mysql_connect("$host", "$db_username", "$db_password");
$db_select = mysql_select_db("$db_name");
mysql_set_charset('utf8', $db_connect);

$db_query_project="SELECT * FROM $tbl_name";

print('<form name="report" method="post" action="">');
print('<label for="project">Projekt </label>');
print('<select name="project_select">');

print('<option>Test</option>');

foreach ($db_query_project as $key => $value){
        print('<option>'.$key['project_name'].'</option>');
}
print('</select>');
print('</form>');

还有更好的方法吗？

Answer 1

您需要连接到数据库并执行查询才能检索数据并获取数据。为此，您可以使用mysqli或PDO。以下是如何使用mysqli从列$tbl_name中获取数据project_name的示例。

$mysqli = new mysqli("localhost", "user", "password", "database");
if ($mysqli->connect_errno) {
echo "Failed to connect to MySQL: (" . $mysqli->connect_errno . ")";
exit();
}

$query = "SELECT * FROM `$tbl_name`";

if ($result = $mysqli->query($query)) {

    /* fetch associative array */
    while ($row = $result->fetch_assoc()) {
        printf ("%s \n", $row["project_name"]);
    }

    /* free result set */
    $result->free();
}

/* close connection */
$mysqli->close();

Answer 2

我更喜欢这个：

function getFieldSelect($name, $selected, $values, $attributes) {
    $r = "<select name=\"$name\" $attributes>";
    foreach ($values as $k => $v) {
        if ($k == $selected) {
            $sel = "selected";
        } else {
            $sel = "";
        }
        $r .= "<option  value=\"$k\" $sel>$v</option>\n";
    }
    $r .= "</select>";
    return $r;
}

我从DB获取了值并以数组格式将其提供给我的函数。我认为这是打印选择字段最灵活的方式。您可以使用数据库来获取值或任何数组。

Answer 3

<?php
$db_query_project= mysql_query("SELECT * FROM $tbl_name");

echo '<form name="report" method="post" action="">';
echo '<label for="project">Projekt </label>';
echo '<select name="project_select">';

echo '<option>Test</option>';

while( $row = mysql_fetch_assoc( $db_query_project ) )
{
        echo '<option>'.$row['project_name'].'</option>';
}
echo '</select>';
echo '</form>';

循环遍历mysql数组并将每一行打印到<select> </select>

3 个答案: