使用PHP（数组）从Json输出数据

This is my json Output. i want to echo 'resolution' only. How is that possible?

Array
(
[uploader] => CoversDamian
[formats] => Array
    (
        [0] => Array
            (
                [preference] => -50
                [resolution] => 720p
            )
        [1] => Array
            (
                [preference] => -100
                [resolution] => 1080p
            )
    )          
)

$myarray = Array
(
[uploader] => CoversDamian
[formats] => Array
    (
        [0] => Array
            (
                [preference] => -50
                [resolution] => 720p
            )
        [1] => Array
            (
                [preference] => -100
                [resolution] => 1080p
            )
    )          
)

echo $myarray["formats"][1]["resolution"];

if you have more array in formats key then you can use foreach loop based on formats key. Becuase you want to print all resolution under the formats key. So

foreach($myarray["formats"] as $key => $value){
    echo $value["resolution"]."<br>";
}

In the case you want to echo all resolutions you need a loop like this:

for ($i = 0; $i < sizeof($array["formats"]); $i++){
 echo $array["formats"][$i]["resolution"];
}

Hope it helps!

Assuming the json is in object notation, stored as $json you can loop through the 'formats' as follows :

foreach($json->formats as $key=>$value) {
   echo $value->resolution . "
";
}

If it is not in object notation, you can loop through the sub-keys in the array (assuming it is store in the variable $json) as follows :

foreach($json['formats'] as $key=>$value) {
   echo $value['resolution'] . "
";
}

Notice the subtle difference in the way you can access sub-keys/elements in an object vs in an array.

$arr = array(
'uploader' => 'CoversDamian',
'formats' => array
    (
        0 => array
            (
                'preference' => '-50',
                'resolution' => '720p'
            ),
        1 => array
            (
                'preference' => -'100',
                'resolution' => '1080p'
            )
    )          
);

foreach ($arr['formats'] as $key=>$val) {
  echo   $val['resolution'];
}