php获取json字符串键和值[重复]答案

【问题标题】：php get json string key and value [duplicate]php获取json字符串键和值[重复]
【发布时间】：2015-06-30 06:21:58
【问题描述】：

在 php 中如何获取 activity_id_0 和 student_phone_0 的值等等。我的 json 字符串就像

array(
    'json_text' => '{
    "student_activity":{"activity_id_0":"1","student_id_0":"1","charges_0":"123"},
    "student_contact_info":{"student_phone_0":"7867857986","student_id_0":"1","student_email_0":""}
    }'
)

【问题讨论】：

你有没有试过？？？
我试过 json_decode 但它给了我错误

标签： php json

【解决方案1】：

您可以将此json解码为数组并通过键获取：

$a = array(
    'json_text' => '{
    "student_activity":{"activity_id_0":"1","student_id_0":"1","charges_0":"123"},
    "student_contact_info":{"student_phone_0":"7867857986","student_id_0":"1","student_email_0":""}
    }'
);
$json = json_decode($a['json_text'],true);
$activity_id_0 = $json["student_activity"]["activity_id_0"];
$student_phone_0 = $json["student_contact_info"]["student_phone_0"];
echo $activity_id_0,' ',$student_phone_0; //1 7867857986

【讨论】：

【解决方案2】：

使用json_decode():

$arr = array(
    'json_text' => '{
        "student_activity":{"activity_id_0":"1","student_id_0":"1","charges_0":"123"},
        "student_contact_info":{"student_phone_0":"7867857986","student_id_0":"1","student_email_0":""}
    }'
);

var_dump(json_decode($arr['json_text'])->student_contact_info->student_phone_0);

PHP 手册中的更多信息：http://php.net/manual/en/function.json-decode.php

【讨论】：

【解决方案3】：

这里需要将json对象转成数组，试试下面的代码

$info = array(
        'json_text' => '{
        "student_activity":{"activity_id_0":"1","student_id_0":"1","charges_0":"123"},
        "student_contact_info":{"student_phone_0":"7867857986","student_id_0":"1","student_email_0":""}
        }'
    );

    // here we can convert json object into an array
    $arrayInfo = json_decode($info['json_text'], true);

    echo '<pre>';
    print_r($arrayInfo['student_activity']);
    print_r($arrayInfo['student_contact_info']);

我认为它会对你有所帮助.. :-)

【讨论】：