如何在PHP mysql中按州和每行3个城市分组_Php_Mysql_Html Table

如何在PHP mysql中按州和每行3个城市分组

php mysql

如何在PHP mysql中按州和每行3个城市分组,php,mysql,html-table,Php,Mysql,Html Table,我有一个带有state和city的mysql表我的问题是这样的： $result = mysqli_query($con, "select * from " . $loc_tbl . " order by city ASC"); echo "<html><head></head><body> <table>"; $num_columns = 3; $num_rows = mysqli_num_rows($result);

我有一个带有state和city的mysql表

我的问题是这样的：

$result = mysqli_query($con, "select *  from " . $loc_tbl . "  order by city ASC");

echo "<html><head></head><body> 
<table>"; 

$num_columns = 3;
$num_rows = mysqli_num_rows($result);
$i=0;
while($row = mysqli_fetch_assoc($result)){
    $results[$i] = $row['city'];
    $i++;
}
unset($i);
$k=0;
for ($i=0;$i<=($num_rows/($num_columns+1));$i++){
    echo '<tr>';

for($j=1;$j<=$num_columns;$j++){
    echo '<td>'.$results[$k].'</td>';
    $k++;
}

echo '</tr>';
$k++;
}
echo "</table></body>
</html>";

我能够将城市分布在每行3列中

我对行标题的状态有问题

感谢您的帮助

请尝试以下内容-

步骤：

1将行数据转换为数组，这样状态将是具有城市数组值的键

2显示为$num_列定义的值

请仔细阅读，我们是来帮助解决问题的，而不是为您编写完整的代码。抱歉@Naruto，我可以在3个html表格列中显示城市，但缺少行标题逻辑。你能帮忙吗？我爱你，谢克哈比斯兄弟。我工作过。感谢AlotGlad帮助@bgb76，如果此答案解决了您的问题，请单击答案旁边的复选标记将其标记为已接受。有关更多信息，请参阅

              California
---------------------------------------
San Jose | Santa Clara | Palo Alto
---------------------------------------
Los Angeles | Orange County | Los Gatos
---------------------------------------

              New Jersey
---------------------------------------
Morristown | Union | Summit
---------------------------------------
Newark | Parsipenny | Atlantic City

$result = mysqli_query($con, "select *  from " . $loc_tbl . "  order by city ASC");
$num_columns = 3;

/* Step 1 :
 * $rows will be array having
 * State as key and array of cities as value
 */
$rows = array();
while($row = mysqli_fetch_assoc($result)){
    if(!isset($rows[$row['state']])){
        $rows[$row['state']] = array();
    }
    $rows[$row['state']][] = $row['city'];
}


/* Step 2 :
 * Following table will have columns with respect to value defined for  $num_columns
 */
echo "<table>";
foreach($rows as $state => $cities){
    echo '<tr><th colspan="'. $num_columns .'">'. $state .'</th></tr>';
    $cityChunks = array_chunk ($cities, $num_columns);   // split array into chunk of $num_columns cities per array
    foreach($cityChunks as $row){
        echo "<tr>";
        for($i=0; $i<$num_columns; $i++){
            $city = isset($row[$i]) ? $row[$i] : "";
            echo "<td>$city</td>";
        }
        echo "</tr>";
    }
}
echo "</table>";