PHP通过匹配数组键的最后一个字符来合并数组

Question

我正在使用 SQL 检索表单数据并使用 PHP 显示它。这些字段显示为qualification_0 和qualification_type_0，唯一变化的值是数字，因此我想将这些值分组到一个数组中，然后我可以将其显示到正确的输入中。

用户可以删除输入，因此数字不会总是以 1 递增，而是始终成对发送。

目前

数据显示为：

Array
(
    [qualification_0] => Karate
    [qualification_2] => Test
    [qualification_type_0] => Course
    [qualification_type_2] => Certificate
)

目标

我正在努力实现以下目标：

Array
(
    [0] => Array
        (
            [qualification_0] => Karate
            [qualification_type_0] => Course
        )
    [1] => Array
        (
            [qualification_2] => Test
            [qualification_type_2] => Certificate
        )
)

我的代码

SQL/PHP：

    public function getAllSelfDevelopments()
    {
        global $wpdb;
        $table_name = $wpdb->prefix . "usermeta";
        $result = $wpdb->get_results(
            "
            SELECT meta_key, meta_value
            FROM $table_name
            WHERE user_id = $this->user_id
            AND meta_key LIKE 'qualification%'
            ", ARRAY_A
        );

        return $result;
    }

查询结果：

Array
(
    [0] => Array
        (
            [meta_key] => qualification_0
            [meta_value] => Karate
        )

    [1] => Array
        (
            [meta_key] => qualification_2
            [meta_value] => Test
        )

    [2] => Array
        (
            [meta_key] => qualification_type_0
            [meta_value] => Course
        )

    [3] => Array
        (
            [meta_key] => qualification_type_2
            [meta_value] => Certificate
        )

)

尝试：

    $self_developments = $candidate->getAllSelfDevelopments();

    $self_developments_arr = [];
    foreach($self_developments as $value){
        $self_developments_arr[$value['meta_key']] = $value['meta_value'];
    }

    $self_dev = [];
    foreach($self_developments_arr as $key => $value){

        if(strpos($key, $key[-1]) !== FALSE && !in_array($key, $self_dev)){
            $self_dev[] = [
                $key => $value
            ];
        }

    }

任何帮助将不胜感激。

Answer 1

这应该可以帮助您实现目标。它涉及正则表达式的一些高级使用。

//Load in meta data
$self_developments = $candidate->getAllSelfDevelopments();

//Create container for results
$results = [];
foreach($meta_values as $meta) {

    //Create Named matching groups that go into $matches. See PHP docs for details.
    preg_match('/(?P<key>.+)_(?P<index>\d+)/',$meta['meta_key'], $matches);

    //Use our index value to act as a guide to place our data. If the index does not exist, make it an empty array.
    //Otherwise, merge in our existing data with the new data.
    $results[$matches['index']] = array_merge($results[$matches['index']] ?? [], [$meta['meta_key'] => $meta['meta_value']]);

}
//if you want to re-index the array.
$results = array_values($results);

应该输出：

Array
(
    [0] => Array
        (
            [qualification_0] => Karate
            [qualification_type_0] => Course
        )

    [2] => Array
        (
            [qualification_2] => Test
            [qualification_type_2] => Certificate
        )

)

或者，如果您选择重新索引：

Array
(
    [0] => Array
        (
            [qualification_0] => Karate
            [qualification_type_0] => Course
        )

    [1] => Array
        (
            [qualification_2] => Test
            [qualification_type_2] => Certificate
        )

)

Answer 2

这个解决方案可以解决吗？

$array = [
    'qualification_0' => 'Karate',
    'qualification_2' => 'Test',
    'qualification_type_0' => 'Course',
    'qualification_type_2' => 'Certificate',
];

foreach ($array as $key => $value) {
    preg_match('~(.+)_(\d+)~', $key, $match);
    ${$match[1]}[$match[2]] = $value;
}

$result = array_combine($qualification, $qualification_type);
print_r($result);

它会输出：

Array                                                                                                                                                     
(                                                                                                                                                         
    [Karate] => Course                                                                                                                                    
    [Test] => Certificate                                                                                                                                 
)