PHP foreach 改變二維原始數組值

Question

我需要將空值替換為 0 並將原始數組更改為輸出。 我的代碼不起作用...只更改第二個 foreach 循環值。 怎么做？ 我需要的輸出數組是...（我的空值不是固定在鍵中）非常感謝...我的數組：

 Array
    (
        [0] => Array
            (
                [D1] => 2
                [D2] => 2
                [D3] =>   (Expect the null value to change to 0)
                [D4] =>   (Expect the null value to change to 0)
                [D6] =>   (Expect the null value to change to 0)
                [N1] => 1
                [N2] => 1
                [N3] =>   (Expect the null value to change to 0)
                [N4] =>   (Expect the null value to change to 0)
                [N5] =>   (Expect the null value to change to 0)
            )
    
        [1] => Array
            (
                [D1] => 3
                [D2] => 2
                [D3] => 2
                [D4] => 2
                [D5] =>   (Expect the null value to change to 0)
                [D6] =>   (Expect the null value to change to 0)
                [T1] => 1
                [T2] => 1
                [T3] => -1
                [T4] =>   (Expect the null value to change to 0)
                [T5] =>   (Expect the null value to change to 0)
            )
    
    )

下面是我的代碼：

 foreach($myArray as $key=> $value){
        foreach($value as $key2 => $value2){
            if(empty($value[$key2])){
             $value[$key2]="0";
           }
             //print_R($value[$key2]);
}   
    

Answer 1

foreach($myArray as $key=> $value){
        foreach($value as $key2 => $value2){
            if(empty($value[$key2]) || $value[$key] === null){ //added null checking, you can add more:  $value[$key] == ""
             $value[$key2] = 0; //changed to int (using "0" makes string)
           }
             //print_R($value[$key2]);
}

Answer 2

您可以使用&在 foreach 循環中傳遞變量引用。 你可以試試下面的代碼。

foreach ($myArray as $key => &$value) {
    foreach ($value as $key2 => $value2) {
        if($value2 == null) {
         $value[$key2]="0";
        }
    }
}
print_r($myArray);