如何将输出的数组分组

时间:2018-04-21 01:48:10

标签: php sorting

我输出的数组列表显示了这个; enter image description here

我想让它像:

Imran Omer
Imran Omer
sumair
sumair
sumair
sumair
sumair
wrewr
wrewr
wrewr
wrewr
wrewr

我怎么能这样排序?

这是我正在使用的代码;

if (!in_array($a['sid'],$leave_sids))
                {
                    $struck_off_list_bit .= '
                        <tr>
                            <td>'.$a['sid'].'</td>
                            <td><a href="school_id.php?action=preview_id_card&sid='.$a['sid'].'">'.$a['student_name'].'</a></td>
                            <td>'.$date.'</td>
                            <td>'.$student_class.'</td>
                            <td style="background: #'.$bg_color.'">'.$leave_submitted.'</td>
                        </tr>
                    ';
                }

4 个答案:

答案 0 :(得分:1)

好像你正在寻找usort()

首先定义一个函数,如

function sortByStudent($a, $b) {
    return $a['student_name'] - $b['student_name'];
}

然后,在$a阵列上调用它:

usort($a, 'sortByStudent');

PHP documentation for usort

答案 1 :(得分:1)

你需要使用array_multisort()函数,你的代码应该像这样的代码:

<?php
$students = array(
    array('sid' => '38', 'student_name' => 'wrewr'),
    array('sid' => '2', 'student_name' => 'Imran Omer'),
    array('sid' => '36', 'student_name' => 'sumair'),
    array('sid' => '2', 'student_name' => 'Imran Omer'),
    array('sid' => '36', 'student_name' => 'sumair'),
    array('sid' => '38', 'student_name' => 'wrewr'),
    array('sid' => '36', 'student_name' => 'sumair'),
);
$new_array = array();
foreach ($students as $key => $row) {
    $new_array[$key] = $row['student_name'];
}
array_multisort($new_array, SORT_ASC, $students);

print_r($students);
?>

答案 2 :(得分:1)

另一个选项

function array_sort($arr, $key, $type = 'asc')
{
    $keys = $new_array = array();
    foreach ($arr as $k => $v) {
        $keys[$k] = $v[$key];
    }

    if ($type == 'asc') {
        asort($keys);
    } else {
        arsort($keys);
    }

    reset($keys);

    foreach ($keys as $k => $v) {
        $new_array[$k] = $arr[$k];
    }
    return $new_array;
}

使用array_sort($a,'student_name')

答案 3 :(得分:0)

您可以在查询中使用GROUP BY子句。它会自动对所有结果进行分组