How to sort multidimensional PHP array (recent news time based implementation)

问题

i got some recent news rss in xml format and change in to json format , it is needed for android application to display recent news. i have an following JSON array ...

{
    "rss_news": [
        {
            "title": " ",
            "rss_original_src": "recent_news1(google news)",
            "rss_original_src_img": "",
            "link": "",
            "pubDate": "Tue, 19 Apr 2016 14:05:47 +0530",
            "description": ""
        },
 {
            "title": " ",
            "rss_original_src": "recent_news2(yahoo news)",
            "rss_original_src_img": "",
            "link": "",
            "pubDate": "Tue, 19 Apr 2016 16:05:47 +0530",
            "description": ""
        },
 {
            "title": " ",
            "rss_original_src": "recent_news3",
            "rss_original_src_img": "",
            "link": "",
            "pubDate": "Tue, 19 Apr 2016 11:05:47 +0530",
            "description": ""
        },
....
]
}

---

Now i need ... PHP multi dimensional array sort based on value(pubDate)..

Thanks in advance..

回答1:

First convert your JSON string to PHP array using json_decode.

Use usort to sort the array like.

usort($array, 'sortByDate');

function sortByDate($a, $b) {
    $date1=$a['pubDate'];
    $date2=$b['pubDate'];

   //return value based on above two dates.
}

来源：https://stackoverflow.com/questions/36717455/how-to-sort-multidimensional-php-array-recent-news-time-based-implementation