使用PHP进行JSON解码 [英] JSON DECODE using PHP

问题描述

我正在做一些JSON解码-我按照本教程进行了很好的解释-如何使用PHP解析JSON

I am doing some JSON decodes - I followed this tutorial well explained - How To Parse JSON With PHP

和PHP代码，我使用了

and the PHP code, I used

 <?php
 $string='{"person":[
            {
                "name":{"first":"John","last":"Adams"},
                "age":"40"
            },
            {
                "name":{"first":"Thomas","last":"Jefferson"},
                "age":"35"
            }
         ]}';

$json_a=json_decode($string,true);

$json_o=json_decode($string);


// array method
foreach($json_a[person] as $p)
{
echo '

Name: '.$p[name][first].' '.$p[name][last].'

Age: '.$p[age].'

';

}




// object method
foreach($json_o->person as $p)
{
echo '

<br/> Name: '.$p->name->first.' '.$p->name->last.'

Age: '.$p->age.'

';
}


 ?>

工作正常...但我担心，我只需要Thomas姓氏和年龄的详细信息。我需要处理它以便仅提取某些功能，而不是所有对象。

It is working correctly... But my concern I need only details of Thomas' last name and age. I need to handle this to extract only certain features, not all the objects.

推荐答案

给出此JSON ，您可以按以下方式获取国家/地区的货币：

Given this JSON, you can get the currency of a country as follows:

function getCurrencyFor($arr, $findCountry) {
    foreach($arr as $country) {
        if ($country->name->common == $findCountry) {
            $currency = $country->currency[0];
            break;
        }
    }
    return $currency;
}

$json = file_get_contents("https://raw.githubusercontent.com/mledoze/countries/master/countries.json");
$arr = json_decode($json);
// Call our function to extract the currency for Angola:
$currency = getCurrencyFor($arr, "Angola");

echo "Angola has $currency as currency";

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