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"] )

我也想要这样

数组（[0] => 1 [1] => 2 [2] => 7 [3] => 8 [4] => 9）

我试试 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);