如何在PHP mysql中按州和每行3个城市分组头

Question

我有一个带有状态，城市的mysql表。

我的查询是这样的：

$result = mysqli_query($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>";

想要显示状态为标题

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

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

能够将城市分布在每行3列

我将STATE作为ROW HEADER遇到问题

任何帮助表示赞赏

Answer 1

请尝试这个-

脚步：

1）将行数据转换为数组，以使状态成为具有城市数组值的键

2）显示为$ num_columns定义的值

$result = mysqli_query($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>";

如何在PHP mysql中按州和每行3个城市分组头

问题描述

1 个解决方案

解决方案1
2 已采纳 2018-06-07 12:39:47

如何在PHP mysql中按州和每行3个城市分组头

问题描述

1 个解决方案

解决方案1 2 已采纳 2018-06-07 12:39:47

解决方案1
2 已采纳 2018-06-07 12:39:47