dongpu2694 2015-11-17 15:00
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在foreach中创建数组,键是循环中的第一个值

I have some filters:

$filters = array('rooms-4-5', 'city-london-berlin-paris');

and I wanna create a array like this:

array(
     'rooms' => array('4', '5'),
     'city'  => array('london', 'berlin', 'paris')
);

I tried:

    foreach($filters as $filter):
        $filter = explode('-', $filter);
        $data[$filter[0]] = array();
        array_shift($filter);
        foreach($filter as $value):
            //here I am stuck ...
        endforeach;
    endforeach;
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  • dongpa6867 2015-11-17 15:05
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    You seem to have been fairly close, except for that fact that you already have the array elements in $filter and you only needed to remove the first variable (by using array_shift()) and insert it.

    The thing is that array_shift() (link to documentation) returns the removed value so you can store that in the array and use it for the key. And the array after shifting is ready to be used.

    Here's the full result:

    <?php
    $filters = array('rooms-4-5', 'city-london-berlin-paris');
    $out = array();
    foreach($filters as $filter) {
        $filter_exploded = explode('-',$filter);
        $val = array_shift($filter_exploded); // remove first element, add it to the variable
        $out[$val] = $filter_exploded;
    }
    var_dump($out);
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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