我的 PDO 语句返回 3 个数据字段,并在 3 列表中显示 3 个字段:
我想调整代码,使显示的表格只有 2 列。
第一列应显示该国家/地区的国旗而不是名称。该标志将位于以下文件夹 site_url(); ?>/wp-content/gallery/Flags/'Country'.png
.
第二列应显示两者名字和姓氏。
<?php
//Table
echo "<table style='border: solid 1px orange;'>";
echo "<tr><th>Country</th><th>First Name</th><th>Last Name</th></tr>";
class TableRows extends RecursiveIteratorIterator
{
function __construct($it)
{
parent::__construct($it, self::LEAVES_ONLY);
}
function current()
{
return "<td style='width:150px;border:1px solid orange;'>".parent::current()."</td>";
}
function beginChildren()
{
echo "<tr>";
}
function endChildren()
{
echo "</tr>" . "\n";
}
}
//Connection Info
//Connection Started, Data pulled
try {
$conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$firstname = $_GET['fname'];
$stmt = $conn->prepare('SELECT Country, First_Name, Last_Name FROM tblPlayers WHERE First_Name = :fname');
$stmt->bindValue(':fname', $firstname, PDO::PARAM_INT);
$stmt->execute();
// set the resulting array to associative
$result = $stmt->setFetchMode(PDO::FETCH_ASSOC);
foreach(new TableRows(new RecursiveArrayIterator($stmt->fetchAll())) as $k=>$v) {
echo $v;
}
}
//Error Check
catch(PDOException $e) {
echo "Error: " . $e->getMessage();
}
// Take Text entry and fetch the SQL Row
//Kill Connection
$conn = null;
echo "</table>";
?>
感谢您帮助解决我的问题。
最佳答案
正如我在帖子中提到的,为了方便和可读性,我个人更倾向于以不同的方式做一些事情:
I would separate out the connection and querying from the view.
/functions/myfunctions.php
function connect($host = 'myhost',$database = 'mydatabase',$password = 'mypassword',$username = 'myusername')
{
$conn = new PDO("mysql:host={$host};dbname={$database}", $username, $password);
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
return $conn;
}
function fetch($conn, $sql, $bind = false)
{
if(!empty($bind)) {
$query = $conn->prepare($sql);
$query->execute($bind);
}
else {
$query = $conn->query($sql);
}
while($result = $query->fetch(PDO::FETCH_ASSOC)) {
$row[] = $result;
}
return (!empty($row))? $row : 0;
}
2) I would include the above then instead of extending iterators, just use a basic loop
/whatever.php
<?php
// Include functions
include_once(__DIR__.'/functions/myfunctions.php');
// Set defaults if the $_GET is no good (user manipulated)
$query = 0;
$firstname = (is_numeric($_GET['fname']))? $_GET['fname'] : false;
$con = connect();
if($firstname) {
$query = fetch($con,"SELECT `Country`, `First_Name`, `Last_Name` FROM `tblPlayers` WHERE `First_Name` = :fname",array(":fname"=>$firstname));
}
?>
<!-- CREATE A STYLE SHEET INSTEAD OF INLINE -->
<style>
table.mytable,
table.mytable td {
border: 1px solid orange;
}
table.mytable td {
width: 150px;
}
</style>
<table class="mytable">
<tr>
<th>Country</th>
<th>Name</th>
</tr>
<?php if($query != 0) {
foreach($query as $person) {
?> <tr>
<td><img src="/images/flags/<?php echo $person['Country']; ?>.jpg" /></td>
<td><?php echo $person['First_Name']; ?> <?php echo $person['Last_Name']; ?></td>
</tr>
<?php }
}
else {
?> <tr>
<td colspan="2">No name selected.</td>
</tr>
<?php
}
?></table>
<小时/>
编辑:发布此内容后,我发现@YourCommonSense建议使用concat()
,这是一个更好的主意SQL
语句。
关于php - 在 PDO 选择查询中组合两列/字段,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/35097680/