drhanjuw56233 2018-03-04 21:45
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PHP拆分和组数组

I am having a hard time figuring out how to modify my array. The original array is this...

$array = array(
array(
    "fruit" => "pineapple",
    "id" => "aaa",
),
array(
    "fruit" => "orange",
    "id" => "aaa",
),
array(
    "fruit" => "apple",
    "id" => "bbb",
),
array(
    "fruit" => "pear",
    "id" => "bbb",
),
array(
    "fruit" => "peach",
    "id" => "ccc",
),
array(
    "fruit" => "melon",
    "id" => "ccc",
)
);

I need to convert this array into an array of keys by id. For example I would want the end result to look like this...

$array = array(
"aaa" => array("pineapple", "orange"),
"bbb" => array("apple", "pear"),
"ccc" => array("peach", "melon"),
);

I have attempted to loops through the array and pull out the things I need and rebuild the array but I cant figure it out. Hopefully someone can help me. Thanks!

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1条回答 默认 最新

  • dongxun2089 2018-03-04 21:54
    关注

    You can do it by making a new array this way:

    $array = array(
        array(
            "fruit" => "pineapple",
            "id" => "aaa",
        ),
        array(
            "fruit" => "orange",
            "id" => "aaa",
        ),
        array(
            "fruit" => "apple",
            "id" => "bbb",
        ),
        array(
            "fruit" => "pear",
            "id" => "bbb",
        ),
        array(
            "fruit" => "peach",
            "id" => "ccc",
        ),
        array(
            "fruit" => "melon",
            "id" => "ccc",
        )
    );
    
    // empty array
    $result = [];
    
    // loop trough data
    foreach($array as $value){
    
        // add item to the $result array. Then make the id the key and the fruit the value
        $result[$value['id']][] = $value['fruit'];
    
    }
    
    //print array
    print_r($result);
    

    The result will be

    Array ( [aaa] => Array ( [0] => pineapple [1] => orange ) [bbb] => Array ( [0] => apple [1] => pear ) [ccc] => Array ( [0] => peach [1] => melon ) )
    
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