使用PHP打印JSON，然后保存为JSON文件。

I am currently using the following script to print a json file

我目前正在使用以下脚本打印json文件

<?PHP 

include ('connect.php');



$get_student = mysql_query("SELECT * FROM student ORDER BY name asc");
$anArray = json_decode ($data);

while ($row = mysql_fetch_assoc($get_student)) {

$anArray[] = $row;

}
header("Content-type: application/json"); 
echo json_encode ($anArray, JSON_PRETTY_PRINT)
?>

I am then fetching the json file in xcode using AFNETWORKING and saving it into the document directory

然后，我使用AFNETWORKING在xcode中获取json文件，并将其保存到文档目录中

  url = [NSURL URLWithString:@"url/Json3.php"];

NSURLRequest *request = [[NSURLRequest alloc] initWithURL:url];

AFHTTPRequestOperation *downloadOperation = [[AFHTTPRequestOperation alloc] initWithRequest:request];

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *path = [[paths objectAtIndex:0] stringByAppendingPathComponent:@"database"];

downloadOperation.outputStream = [NSOutputStream outputStreamToFileAtPath:path append:NO];

[downloadOperation start];

I am then trying to read the downloaded document as a JSON file with the following

然后，我尝试以JSON文件的形式读取已下载的文档，如下所示

NSURL *JsonUrl = [NSURL fileURLWithPath:path];
NSURLRequest *JSONrequest = [[NSURLRequest alloc] initWithURL:JsonUrl];

AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:JSONrequest success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {


    anArray = JSON;
    } failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON) {
    NSLog(@"Request Failed with Error: %@, %@", error, error.userInfo);
}];
[operation start];

However AFNetworking gives me the following error line in log

然而，AFNetworking在日志中给我提供以下错误行

Request Failed with Error: Error Domain=AFNetworkingErrorDomain Code=-1016 "Expected content type {( "text/json", "application/json", "text/javascript" )}, got text/plain" UserInfo=0xa49f990 {NSLocalizedRecoverySuggestion=[

错误请求失败:ErrorDomain =AFNetworkingErrorDomain Code=-1016“预期内容类型{(“text/json”、“application/json”、“text/javascript”)}，获取text/plain”UserInfo=0xa49f990 {nslocalizedrecoverysuggest =[

and then shows the text documents contents in the log

然后显示日志中的文本文档内容

QUESTION

问题

How do I make the PHP JSON Print, print a Application/Json document and not a text document?

如何使PHP JSON打印、打印应用程序/ JSON文档而不是文本文档?

Thanks

谢谢

3 个解决方案

#1

Assuming it is a headers already sent problem, in your "connect.php", at the very top, put

假设它是一个已经发送了问题的标题，在您的“连接”中。在最上面写上php

ob_start();

This will start outbut buffering which basically means, php doesnt send anything to the browser until everything is rendered (or until the buffer is sent, stopped etc..)

这将从缓存开始，这基本上意味着，php在呈现所有内容之前不会向浏览器发送任何内容(或者直到发送缓冲区，停止等等)。

If its something else and you just want to save your data into a json file, you can use

如果它是别的东西，而您只想将数据保存到json文件中，您可以使用

file_put_contents('myfile.json', json_encode($anArray, JSON_PRETTY_PRINT));

Also, it could be a problem with the flags you are passing to the json_encode function. Just a thought.

此外，传递给json_encode函数的标志也可能存在问题。只是一个想法。

#2

Check content of connect.php that no spaces are after the php end tag, or just remove ?>

检查连接的内容。php结束标记后没有空格，还是删除?>

#3

Ok i didnt resolve the print issue but a simple line of code made it work

好的，我没有解决打印问题，但是简单的一行代码使它工作

    [AFJSONRequestOperation addAcceptableContentTypes:[NSSet setWithObject:@"text/plain"]];

hope this helps somebody with a similar issue

希望这能对有类似问题的人有所帮助

#1