Bagaimana untuk menapis tatasusunan berbilang dimensi berdasarkan lajur dalam tatasusunan bersarang?

Question

Andaikan saya mempunyai tatasusunan seperti ini:

$array =    [    

    0 => [  
        "label"    =>  "Radiator",  
        "details"  =>   0 => [  
                            "label"     => "Condition",  
                            "value"     => "New",
                        ], 
                        1 => [  
                            "label"     => "Type",  
                            "value"     => "Wall",
                        ],
    ],  
    1 => [  
        "label"    =>  "Airco",  
        "details"  =>   0 => [  
                            "label"     => "Condition",  
                            "value"     => "New",
                        ], 
                        1 => [  
                            "label"     => "Type",  
                            "value"     => "",
                        ], 
    ], 
    2 => [  
        "label"    =>  "Refrigerator",  
        "details"  =>   0 => [  
                            "label"     => "Condition",  
                            "value"     => "Bad",
                        ], 
                        1 => [  
                            "label"     => "Type",  
                            "value"     => "Wall",
                        ], 
    ], 

];

Saya ingin menapis tatasusunan ini supaya ia hanya mengandungi butiran di mana nilainya tidak kosong. type 值为空，因此它不应返回详细的 type oleh Airco. Dalam kes ini, tatasusunan yang dikembalikan sepatutnya kelihatan seperti ini:

$array =    [    

    0 => [  
        "label"    =>  "Radiator",  
        "details"  =>   0 => [  
                            "label"     => "Condition",  
                            "value"     => "New",
                        ], 
                        1 => [  
                            "label"     => "Type",  
                            "value"     => "Wall",
                        ],
    ],  
    1 => [  
        "label"    =>  "Airco",  
        "details"  =>   0 => [  
                            "label"     => "Condition",  
                            "value"     => "New",
                        ],
    ], 
    2 => [  
        "label"    =>  "Refrigerator",  
        "details"  =>   0 => [  
                            "label"     => "Condition",  
                            "value"     => "Bad",
                        ], 
                        1 => [  
                            "label"     => "Type",  
                            "value"     => "Wall",
                        ], 
    ], 

];

Saya tahu saya boleh menapis tatasusunan berdasarkan lajur kosong menggunakan kod berikut (seperti yang terdapat di sini):

$result = array_filter($array, function($o) use($column) {
    return trim( $o[$column] ) !== '' && $o[$column] !== null;
});

Tetapi memandangkan saya mempunyai tatasusunan bersarangdetails, saya tidak pasti cara menyesuaikan kod ini untuk menjadikannya berfungsi untuk kes saya.

Answer 1

Milik andaarray_filter仅在第一级起作用。您还希望在 details 数组上进行循环，您可以使用简单的 foreach 循环来完成此操作。外部循环将遍历所有行，内部循环将遍历每行的详细信息.

<?php

foreach($array as &$row){
    foreach($row['details'] as $key => $record){
        if(strlen($record['value']) == 0){
            unset($row['details'][$key]);
        }
    }
}

Demonstrasi secara langsung