使用从数组创建的表动态添加rowspan

Question

我有一个从数组动态创建的表。使用PHP，如何在重复数据时动态添加rowspan？我希望'Youth Classes'只显示一次并且rowspan = 2。

Array
(
    [0] => Array
        (
            [Type] => Youth Classes
            [Class] => Preschool Class
            [Day] => Saturday
        )

    [1] => Array
        (
            [Type] => Youth Classes
            [Class] => Grade School
            [Day] => Friday
        )
)

<?php
/*Load csv file into array*/
$file = 'list.csv';
$rows = array_map('str_getcsv', file($file));
$headers = array_shift($rows);
$csv = array();
foreach($rows as $row) {
    $csv[] = array_combine($headers, $row);
}

/*Build Table*/
echo "\t\t<table class='table'>\n";
echo "\t\t\t<tr>\n";
    foreach ($headers as $header) {
        echo "\t\t\t\t<th>";
        echo $header;
        echo "</th>\n";
    }
    echo "\t\t\t</tr>\n";
foreach ($csv as $row) {
    echo "\t\t\t<tr>\n";
    foreach ($row as $cell) {
        echo "\t\t\t\t<td>";
        echo $cell;
        echo "</td>\n";
    }
    echo "\t\t\t</tr>\n";
}
echo "\t\t</table>\n";
?>

Answer 1

在每一行上，您可以检查“上方单元格”是否相同，如果是，则取消写入。并且，您可以计算“低于单元格”的数量是相同的，以计算您必须编写的rowspan的数量。

如果两行或更多行相同，则以下代码有效。

/*Build Table*/
echo "\t\t<table class='table'>\n";

// Your header code skipped here...

foreach ($csv as $rid => $row) { // Add key $rid here
    echo "\t\t\t<tr>\n";
    foreach ($row as $cid => $cell) { // Add key $cid here

        // If above cell is the same, skip.
        if ($rid > 0 && isset($csv[$rid-1]) && $csv[$rid-1][$cid] == $cell) 
            continue;

        // Check amount of "below cells" that are the same :
        $rspan = 1 ; $idx = 1 ;
        while (isset($csv[$rid + $idx]) && $csv[$rid + $idx][$cid] == $cell) {
            $rspan++;
            $idx++;
        }

        // Write rowspan if needed.
        echo "\t\t\t\t<td".($rspan > 1 ? ' rowspan="' . $rspan . '"' : '') . ">";
        echo $cell;
        echo "</td>\n";
    }
    echo "\t\t\t</tr>\n";
}
echo "\t\t</table>\n";

产出：

    <table class='table'>
        <tr>
            <td rowspan="2">Youth Classes</td>
            <td>Preschool Class</td>
            <td>Saturday</td>
        </tr>
        <tr>
            <td>Grade School</td>
            <td>Friday</td>
        </tr>
    </table>

Answer 2

我会将您的csv数据分组为多维数组，然后计算每个类别中的行数。这将决定喂rowspan的价值，如果rowspan甚至需要写。

代码：（Demo）

$csv=<<<CSV
Youth Classes,Grade School,Monday
Adult Classes,Grade School,Tuesdayday
Youth Classes,Grade School,Friday
Youth Classes,Preschool Class,Saturday
CSV;

foreach (explode("\n", $csv) as $line) {
    $row = str_getcsv($line, ",");
    $grouped[array_shift($row)][] = $row;
}
//var_export($grouped);

echo "<table>\n";
foreach ($grouped as $category => $group) {
    $rows=sizeof($group);
    foreach ($group as $i => $row) {
        echo "\t<tr>\n";
            if(!$i){  // if this is the first row of the subarray (in other words: [0])
                echo "\t\t<th" , ($rows>1 ? " rowspan=\"$rows\"" : "") , ">$category</th>\n";
            }
            echo "\t\t<td>" , implode("</td>\n\t\t<td>", $row) , "</td>\n";
        echo "\t</tr>\n";
    }
}
echo "</table>";

来源输出：

<table>
    <tr>
        <th rowspan="3">Youth Classes</th>
        <td>Grade School</td>
        <td>Monday</td>
    </tr>
    <tr>
        <td>Grade School</td>
        <td>Friday</td>
    </tr>
    <tr>
        <td>Preschool Class</td>
        <td>Saturday</td>
    </tr>
    <tr>
        <th>Adult Classes</th>
        <td>Grade School</td>
        <td>Tuesdayday</td>
    </tr>
</table>

渲染输出:(由phptester.com提供）