如何将数组元素中的json数据打印为字符串

Question

我有一个数组数组（ [0] => ["1","2","7","8","9"] ）我想喜欢那个数组（[0] => 1 [1] => 2 [2] => 7 [3] => 8 [4] => 9）我尝试 foreach 循环foreach($no_a as $key=>$val){     foreach($val as $k=>$v){         $newp_arr[] $v ;    }}

Answer 1

$result = $no_a[0];

$new_result = array();

for ($i=0; $i < 21 ; $i++) { 

    # code...

    $num = $result[$i];

    if(is_numeric($num))

    {

        $new_result[] = $result[$i];

    }

}

print_r($new_result);