按第一个字符列出的 php/mysql 组列表答案

【问题标题】：php/mysql group list by first character按第一个字符列出的 php/mysql 组列表
【发布时间】：2018-05-28 10:01:38
【问题描述】：

我有以下 mysql 查询：

$manufacturers_query = "select m.manufacturers_id, m.manufacturers_name, m.manufacturers_image, mi.manufacturers_url
                              from manufacturers m
                              left join manufacturers_info mi on m.manufacturers_id = mi.manufacturers_id
                              order by manufacturers_name";
$manufacturers = $db->Execute($manufacturers_query);

while (!$manufacturers->EOF) {
   $man_content .= $manufacturers->fields['manufacturers_name'];
   $manufacturers->MoveNext();
}

如何使生成的列表按首字母分组并在组前添加首字母？例如：

一个

阿尔法罗密欧
奥斯汀·马丁

宝马
别克

凯迪拉克
雪佛兰
克尔维特

【问题讨论】：

标签： php mysql

【解决方案1】：

你可以试试这样的 -

<?php

$manufacturers_query = "select m.manufacturers_id, m.manufacturers_name, m.manufacturers_image, mi.manufacturers_url
                            from manufacturers m
                            left join manufacturers_info mi on m.manufacturers_id = mi.manufacturers_id
                            order by manufacturers_name";
$manufacturers = $db->Execute($manufacturers_query);

$last_letter = '';

while (!$manufacturers->EOF) {
    $man_content = $manufacturers->fields['manufacturers_name'];
    if (strtoupper(substr($man_content, 0, 1)) != $last_letter) {
        $last_letter = strtoupper(substr($man_content, 0, 1));
        print "<h2>$last_letter</h2>";
    }
    print "<p>$man_content</p>";
    $manufacturers->MoveNext();
}

或者这可能首先创建一个由第一个字母组成的制造商索引数组 -

<?php

$manufacturers_query = "SELECT m.manufacturers_id, m.manufacturers_name, m.manufacturers_image, mi.manufacturers_url
                            FROM manufacturers m
                            LEFT JOIN manufacturers_info mi ON m.manufacturers_id = mi.manufacturers_id
                            ORDER BY manufacturers_name";
$manufacturers = $db->Execute($manufacturers_query);

$firstLetterIndexedArray = array();

while (!$manufacturers->EOF) {

    $index = strtoupper(substr($manufacturers->fields['manufacturers_name'], 0, 1));
    $firstLetterIndexedArray[$index][] = $manufacturers->fields;

    $manufacturers->MoveNext();
}

print '<ol>';

foreach ($firstLetterIndexedArray as $letter => $man) {
    print "<li>$letter</li><li><ol>";

    foreach ($man as $manufacturer) {
        print "<li>{$manufacturer['manufacturers_name']}</li>";
    }

    print "</ol></li>";
}

print "</ol>";

【讨论】：

谢谢！我使用了第二个解决方案，对 ul-li 做了一些小的修改，它很完美。谢谢

【解决方案2】：

您可以使用 php 轻松完成此操作。

创建一个$currentChar = "";

并在您的循环中获取制造商的第一个字符并将其与$currentChar 进行比较如果$currentChar != manufacturerFirstChar

关闭ol，将$currentChar更新为新字符，打印并打开一个新的ol

像这样：

$currentChar = "";
$firstRun = true;
$manufacturers_query = "select m.manufacturers_id, m.manufacturers_name,
                         m.manufacturers_image, mi.manufacturers_url
                          from manufacturers m
                          left join manufacturers_info mi on
                          m.manufacturers_id = mi.manufacturers_id
                          order by manufacturers_name";
 $manufacturers = $db->Execute($manufacturers_query);

 while (!$manufacturers->EOF) {
    $man_content .= $manufacturers->fields['manufacturers_name'];
    $temp = substr($man_content, 0, 1));
    if($temp != $currentChar)
    {
        $currentChar = $temp;
        if(!$firstRun)
        {
            // if it's not the first time, close previous li and ol
            echo "</li>";
            echo "</ol>";
        }
        else
        {
            $firstRun = false;
        }
        // print the char and open the ol
        echo "<span class=\"manChar\">".$currentChar."</span>";
        echo "<ol>";
    }
    echo "<li>".$man_content."</li>";
    $manufacturers->MoveNext();
 }
echo "</li>";
echo "</ol>";

我没有测试过，但我相信是这样的。

【讨论】：