解码php：// input json

Question

我有来自file_get_contents('php://input')这段文字：

[{"email":"text@examlple.com","event":"processed","sg_event_id":"JJTr9qA","sg_message_id":"AjvX5L7IQeGOfxmJV-OCnw","smtp-id":"<AfxmJV-OCnw@ismon1.sendgrid.net>","timestamp":16813363}]

我需要获取单个元素，如电子邮件或事件，但无法获取json_decode和其他json_decode才能正常工作。

$obj = json_decode(file_get_contents('php://input'));

如何引用json数据中的单个元素？

Answer 1

您有一个数组，因此，需要获取第一个元素：

$json = '[{"email":"text@examlple.com","event":"processed","sg_event_id":"JJTr9qA","sg_message_id":"AjvX5L7IQeGOfxmJV-OCnw","smtp-id":"<AfxmJV-OCnw@ismon1.sendgrid.net>","timestamp":16813363}]';

$obj = json_decode($json);
echo $obj[0]->email; //output text@examlple.com

Answer 2

到这里，这是一个完全有效的答案：

<?php

$str = '[{"email":"text@examlple.com","event":"processed","sg_event_id":"JJTr9qA","sg_message_id":"AjvX5L7IQeGOfxmJV-OCnw","smtp-id":"<AfxmJV-OCnw@ismon1.sendgrid.net>","timestamp":16813363}]';

$obj = json_decode($str);

echo $obj[0]->email;