设置多维数组

Question

I need to format a flat array into a multidimensional array following client's template. Here is my flat array :

$client = array(
    'LastName'        => 'DUPOND',
    'FirstName'       => 'JEAN',
    'Email'           => '[e-mail]',
    'Address1'        => '126 QUAI BACALAN',
    'ZipCode'         => '33160',
    'City'            => 'BORDEAUX',
    'Country'         => 'FR'
);

And here is my client's template :

    $Template = array(
    'Header'       => array(
        'Context'      => array(
                'LastName'     => '',
                'FirstName'    => ''
        ),
        'Localization' => array(
            'ZipCode'      => '',
            'City'         => '',
            'Country'      => '',
        ),
        'Address1'     => '',
    ),
    'Options'      => array(
        'Email'        => '',
    ),
);

So in the end i need to have a array that looks like :

$Template = array(
'Header'       => array(
    'Context'      => array(
            'LastName'     => 'DUPOND',
            'FirstName'    => 'JEAN'
    ),
    'Localization' => array(
        'ZipCode'      => '33160',
        'City'         => 'BORDEAUX',
        'Country'      => 'FR',
    ),
    'Address1'     => '126 QUAI BACALAN',
),
'Options'      => array(
    'Email'        => '[e-mail]',
));

But it must work with any kind of template. It should work even if tomorrow clients decide to change template structure.

So from a day to another, the template can suddently become :

$Template = array(
'Header' => array(
    'LastName' => '',
    'FirstName' => '',
    'Localization' => array(
        'ZipCode' => '',
        'Deeper' => array(
            'EvenDeeper' => array(
                'Deepest' => array(
                    'City' => '',
                    'Country' => ''
                )
            )
        )
    )
),
'Options' => array(
    'Email' => '',
    'Address1' => ''
));

and the function will still work !

Answer 1

function fillTemplate(&$template, $client) {
    foreach ($template as $key => &$value) {
        if (is_array($value)) {
            fillTemplate($value, $client);
        } elseif (isset($client[$key])) {
            $value = $client[$key];
        }
    }
}

$result = $Template; // Make copy of template
fillTemplate($result, $client);

This walks the template recursively. When it reaches a leaf node, it replaces the value with the corresponding value from $client. It uses reference variables as the argument and in foreach so that the changes are made directly to the template. To preserve the original template, I make a copy of it before calling fillTemplate.