Question

我正在使用一个库系统，该系统输出一个由checkout id组织的PHP数组，例如：

Array (
    [6912] => Array (
        [name] => John Doe
        [email] => johndoe@email.com
        [telephone] => 55555555
        [book] => Gone With the Wind
        [book_id] => 410
    )
    [6913] => Array (
        [name] => John Doe
        [email] => johndoe@email.com
        [telephone] => 55555555
        [book] => War and Peace
        [book_id] => 107
    )
    [6914] => Array (
        [name] => John Doe
        [email] => johndoe@email.com
        [telephone] => 55555555
        [book] => Pride and Prejudice
        [book_id] => 222
    )
)

合并公共值并将此数组重新排列为以下内容的最有效方法是什么：

Array (
    [name] => John Doe
    [email] => johndoe@email.com
    [telephone] => 55555555
    [checked_out] => Array (
        [6912] => Array (
            [book] => Gone With the Wind
            [book_id] => 410
        )
        [6913] => Array (
            [book] => War and Peace
            [book_id] => 107
        )
        [6914] => Array (
            [book] => Pride and Prejudice
            [book_id] => 222
        )
    )
)

澄清

如果我通过user_id查询＆＃34; John Doe＆＃34;，那么这个数组就是我得到的，所以你可以假设在这个例子中名称，电子邮件和电话字段总是相同的。< / p>

到目前为止，我有两种不同的解决方案可以做到这一点，但目前我不确定哪种更有效，或者即使它产生了可衡量的差异。即使我将结帐时间限制为一年，我也不希望该数组包含超过182个项目（假设他们查看了一本书并在第二天将其退回）。我将使用这两种解决方案并选择一种对我来说更直观的解决方案。非常感谢，伙计们！

Answer 1

只需在新的上面创建它，按名称，电子邮件，tel＃一次，然后按结帐项目。示例：Output

$checked_out = array();
foreach ($values as $key => $value) {
    // just a simple initial insertion
    if(empty($checked_out)) {
        $checked_out = array(
            'name' => $value['name'],
            'email' => $value['email'],
            'telephone' => $value['telephone'],
        );
    }
    // push checked out items
    $checked_out['checked_out'][$key] = array('book' => $value['book'], 'book_id' => $value['book_id']);
}

echo '<pre>';
print_r($checked_out);

注意：我不知道使用这个函数的数组函数会更快。

Answer 2

这消除了对foreach循环中每个项目的if检查。这也假设您在所有项目中只有唯一的电子邮件，姓名和电话。

Demo Here

$checked_out = array(
    6912=>array('name'=>'John Doe', 'email'=> 'johndoe@email.com', 'telephone'=>'55555555', 'book'=>'Gone With the Wind', 'book_id' =>410),
    6913=>array('name'=>'John Doe', 'email'=> 'johndoe@email.com', 'telephone'=>'55555555', 'book'=>'War and Peace', 'book_id' =>107),
    6914=>array('name'=>'John Doe', 'email'=> 'johndoe@email.com', 'telephone'=>'55555555', 'book'=>'Pride and Prejudice', 'book_id' =>222)
    );
$output = array();
$first_value = reset($checked_out);
$output['name']=$first_value['name'];
$output['email']=$first_value['email'];
$output['telephone']=$first_value['telephone'];
foreach ($checked_out as $key=>$value){
    $output['checked_out'][$key] = array('book'=>$value['book'],'book_id'=>$value['book_id']);
}

print_r($output);

注意：不知道这是最快的方法。但这是我现在能想到的最快的。

Answer 3

请使用此代码：

$data = array();
$data['name'] = 'John Doe';
$data['email'] = 'johndoe@email.com';
$data['telephone'] = 5555555555;
$data['checkout'] = array(
6912 => array(
    'book' => 'Gone With the Wind',
    'book_id' => 410
),
6913 => array(
    'book' => 'War and Peace',
    'book_id' => 107
),
6914 => array(
    'book' => 'Pride and Prejudice',
    'book_id' => 222
)
);

基于公共值的Rearragne / group PHP数组项

3 个答案: