如何将选项添加到按名称排序的 foreach 循环选择框？

Question

我的选择框中有一个选项循环。它们按名称排序：

 <select>
    <?php
      $pdo = $db->query('SELECT * FROM data ORDER BY name ASC;');
      while ($row = $pdo->fetch(PDO::FETCH_ASSOC)) {
            echo '<option>".$row['name']."<option>
       }
   ?>
 </select>

结果如下所示：

<select>
<option>Alfred</option>
<option>Berta</option>
<option>Jane</option>
<option>Victor</option>
</select>

我现在想在选择框中手动添加另一个选项：

<option>Tamara</option>

但它也应该排序，所以我的结果将是：

<select>
<option>Alfred</option>
<option>Berta</option>
<option>Jane</option>
<option>Tamara</option>
<option>Victor</option>
</select>

这怎么可能？

Answer 1

你必须使用 PHP sort() ：

<?php
    $data = [] ; // use an array to store your data.
    $pdo = $db->query('SELECT * FROM data ORDER BY name ASC;');
    while ($row = $pdo->fetch(PDO::FETCH_ASSOC)) {
        $data[] = $row['name'] ; // add into data
    }
    // add your value :
    $data[] = "Tamara" ;
    // then sort 
    sort($data);
?>
<select>
<?php
    foreach ($data as $item) {
        echo '<option>'.$item.'</option>' ;
    }
?>
</select>

请注意，在这种情况下，您的 ORDER BY 不再需要。

Answer 2

您需要构建自己的数组并使用natcasesort()，因为它的排序比标准的sort() 更好。 Sorting arrays comparison chart.

<select>
<?php
// A listing of names you wish to manually add
$names = [ 'Tamara', 'Jack' ];

// Add names from the database
$pdo = $db->query('SELECT * FROM data ORDER BY name ASC;');
while ($row = $pdo->fetch(PDO::FETCH_ASSOC))
{
    $names[] = $row['name'];
}

// Perform a proper sort
natcasesort( $names );

// Loop and output
foreach( $names as $name )
{
    echo '<option>'.$name.'</option>';
} 
?>
</select>

---

按 cmets 更新

你需要usort()的力量

<select>
<?php
// A listing of rows you wish to manually add
// Since these are not from the database, we need to manually assign the "columns" to be used later
$rows = [
    [ 'name' => 'Tamara', 'id' => 'fake id', 'project' => 'whatever', 'group' => 'some group' ],
    [ 'name' => 'Jack', 'id' => 'fake id 2', 'project' => 'whatever 2', 'group' => 'some group 2' ]
];

// Add rows from the database
$pdo = $db->query('SELECT * FROM data ORDER BY name ASC;');
while ($row = $pdo->fetch(PDO::FETCH_ASSOC))
{
    $rows[] = $row;
}

// Perform a sort which targets the name
usort( $rows, function( $a, $b ){
    return strcmp( $a['name'], $b['name'] );
} );

// Loop and output
foreach( $rows as $data )
{
    echo '<option value='.$data['id'].' data-project='.$data['project'].' data-group='.$data['group'].'>'.$data['name'].'</option>';
} 
?>
</select>