从json格式中提取特定数据

Question

I have the following json format data :

{"query":{
  "count":5,"created":"2014-12-19T15:42:41Z","lang":"en-US","results":{
    "channel":[{
      "item":{
        "forecast":{"date":"19 Dec 2014","high":"61","low":"47"}
       }},{
      "item":{
        "forecast":{"date":"20 Dec 2014","high":"60","low":"48"}
       }},{
      "item":{
        "forecast":{"date":"21 Dec 2014","high":"61","low":"44"}
       }},{
      "item":{
        "forecast":{"date":"22 Dec 2014","high":"58","low":"46"}
       }},{
      "item":{
        "forecast":{"date":"23 Dec 2014","high":"58","low":"45"}
       }}]
     }
   }
}

How can I access specific data from this format (for example only high and low), in order to insert these data in a mySQL database for instance?

Answer 1

Put your json in a variable $str for example, than you can access the items :

$json = json_decode($str);
$res = $json->{'query'}->{'results'}->{'channel'};
foreach($res as $ch) {
    echo "High:" . $ch->{'item'}->{'forecast'}->{'high'} . "<br>";
    echo "Low:" . $ch->{'item'}->{'forecast'}->{'low'} . "<br>";
}