试图将json数据读入php变量以插入mysql

Question

我有以下形式的大量数据，我一直试图读入php变量，然后我将在我的PHP代码中使用它上传到我的mysql数据库。我正在尝试以下代码来测试数据的一部分，但是当我运行php页面时，我只得到一个空白页而不是打印出数据。

json数据保存为books.json并保存在我的网站的根目录中

{
	"date_reviewed":"08/Jan/16",
	"fname":"John",
	"mname":"",
	"lname":"Locke",
	"email":"",
	"title":"Boxed In!",
	"imagelocation":"img\book_covers\BoxedIn.jpg",
	"series_name":"Dr. Gideon Box",
	"sellerssite":"https://www.amazon.com/Boxed-Gideon-Donovan-Creed-Novel-ebook/dp/B019HANKW8",
	"genre":"Thriller,Suspence",
	"authorsite":"https://johnlockeauthor.wordpress.com/",
	"facebook":"https://www.facebook.com/john.locke.395669?fref=ts",
	"fbid":"John Locke",
	"twitter":"https://twitter.com/DonovanCreed",
	"twitterid":"@DonovanCreed",
	"review":"A series you have to be sick to love. I guess that's telling as I do love the series.
                                The latest in a series from an author that also has a number of other series that I have been devouring for the last couple of years. What makes these series unique is that they are all tied together by the characters that star in each series. So, if you're a fan of one and have not branched out into the others then it is time to go to his author page and start the reading adventure that will take you into the minds of a lethal assassin, a gunfighter and reluctant sheriff, and a private detective made famous by escaping from a deranged kidnapper.
                                Dr. Box may be brilliant when it comes to saving the life of children written off as lost causes but his activities outside the operating room have left any that know him with a strong desire to see him thrown into the bowels of hell as he surely is the very epitome of demon walking the earth. Good thing that he's the only one in the world that can save a life that others deem impossible. Just pray that if you've ever slighted him that you never show up in his hospital under his care. It will be an encounter you never live to regret.
                                In this tale Dr. Box is visited by the only man that causes true fear in a doctor who's moral compass was broken at birth. Donovan Creed. An assassin that you do not want to owe a favor to.
                                Donovan comes to collect. He has the plan to kill a terrorist and in the process save thousands of lives. The only problem, what he wants is the one thing Dr. Box cannot do.
                                Painted into a box (pun intended) he has no choice but to call on the one person that even Donovan is afraid of. Rose.
                                Together they come up with a full proof plan. Too bad that Donovan is already two steps ahead and the consequences for Dr. Box are steep and his life may never be the same.
                                As a fan, I say you have to add this to your library.",
	"rating":"5"
}

PHP文件

<?php

   $arr_data = array(); // create empty array
   
   //Get data from existing json file
	   $jsondata = file_get_contents("books.json");

	   // converts json data into array
	   $arr_data = json_decode($jsondata, true);
           
           print_r($arr_data)
?>

感谢您的帮助。