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I am doing accepted answer here but it doesn't work for me. I get NULL.

I produce JSON from an array with:

 NSError* error; NSData *result =[NSJSONSerialization dataWithJSONObject:self.fileNamesListForUpload options:0 error:&error]; NSString *displayJson = [[NSString alloc] initWithData:result encoding:NSUTF8StringEncoding]; NSLog(@"json result %@",displayJson);

this prints ["sample.pdf","sample-1.pdf"] then I use following command to post the string

curl -F "nameList=["sample.pdf","sample-1.pdf"]" url

In my php code;

//get json string $jsonString = $_POST["nameList"]; var_dump($_POST["nameList"]); $arrayOfNames=json_decode($jsonString,true); var_dump($arrayOfNames); echo "ArrayOfNames: ",$arrayOfNames,"\n";

Result is;

string(25) "[sample.pdf,sample-1.pdf]" NULL ArrayOfNames:

or if I add quotes '' I get;

string(27) "'[sample.pdf,sample-1.pdf]'" NULL

Why "" are dismissed when I use _POST? [sample.pdf,sample-1.pdf] I am posting ["sample.pdf","sample-1.pdf"] ?

How can I parse json string and put it into an array?

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3 Answers 3

Reset to default
2

If you send request as curl -F "nameList=["sample.pdf","sample-1.pdf"]" url

var_dump($_POST["nameList"]) will return string(25) "[sample.pdf,sample-1.pdf]".

If you send as curl -F 'nameList=["sample.pdf","sample-1.pdf"]' url

var_dump($_POST["nameList"]) will return string(33) "[\"sample.pdf\",\"sample-1.pdf\"]".

You can use second option and remove backslashs from string.

<?php $jsonString = $_POST["nameList"]; var_dump($jsonString); $jsonString = str_replace("\\", "", $jsonString); var_dump($jsonString); $arrayOfNames=json_decode($jsonString,true); var_dump($arrayOfNames); ?>

Objective-C side:

NSData *jsonArray =[NSJSONSerialization dataWithJSONObject:@[@"sample.pdf", @"sample-1.pdf"] options:0 error:nil]; NSString *stringFromJsonArray = [[NSString alloc] initWithData:jsonArray encoding:NSUTF8StringEncoding]; NSLog(@"%@", stringFromJsonArray); //["sample.pdf","sample-1.pdf"] NSString *requestString = [NSString stringWithFormat:@"nameList=%@", stringFromJsonArray]; NSLog(@"%@", requestString); //nameList=["sample.pdf","sample-1.pdf"] NSURL *url = [NSURL URLWithString:@"http://127.0.0.1/t.php"]; NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0]; [request setHTTPMethod:@"POST"]; [request setHTTPBody:[requestString dataUsingEncoding:NSUTF8StringEncoding]]; NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil]; NSString *responseString = [[NSString alloc] initWithBytes:responseData.bytes length:responseData.length encoding:NSUTF8StringEncoding]; NSLog(@"%@", responseString); /* string(33) "[\"sample.pdf\",\"sample-1.pdf\"]" string(29) "["sample.pdf","sample-1.pdf"]" array(2) { [0]=> string(10) "sample.pdf" [1]=> string(12) "sample-1.pdf" } */
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1 Comment

+1 for puting this together, curl -F 'nameList=["sample.pdf","sample-1.pdf"]' url really prints the correct result let me test this from objective code.
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You've forgotten to urlencode the JSON string causing the $_POST to unpack part of it, you don't want that.

I don't know how to do url encoding in Obj-C but in PHP it is:

"nameList=" . urlencode($json_string);

Then $_POST["nameList"] should contain the string ["sample.pdf", "sample.pdf"], and you can json_decode that.

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2 Comments

actually I am using encoding encoding:NSUTF8StringEncoding I updated the code, but point is this string ["sample.pdf","sample-1.pdf"] received via _POST turns to this [sample.pdf,sample-1.pdf] I dont get that part.
Because you didn't do URL encoding. NSUTF8StringEncoding doesn't sound like something that does URL encoding. The URL encoded paramer should look something like: %5B%22sample.pdf%22%2C%20%22sample.pdf%22%5D
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I ended up givin up _POST request and use this;

$handle = fopen('php://input','r'); $jsonInput = fgets($handle); $decoded = json_decode($jsonInput,true); sendResponse(200, json_encode($decoded));

in Objective-c part

NSError* error; NSData *result =[NSJSONSerialization dataWithJSONObject:self.fileNamesListForUpload options:0 error:&error]; NSString *displayJson = [[NSString alloc] initWithData:result encoding:NSUTF8StringEncoding]; NSLog(@"json result %@",displayJson); if ([self.fileNamesListForUpload count]>=1) { //send file upload request here NSURL* url = [NSURL URLWithString:deleteExtraFilesIn]; __weak ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url]; [request addRequestHeader:@"User-Agent" value:@"ASIHTTPRequest"]; [request addRequestHeader:@"Content-Type" value:@"application/json"]; [request appendPostData:[displayJson dataUsingEncoding:NSUTF8StringEncoding]]; [request setCompletionBlock:^ { if (request.responseStatusCode == 200) { //succesfully inserted row NSError* error; NSString *responseString = [request responseString]; NSDictionary* json = [NSJSONSerialization JSONObjectWithData: [responseString dataUsingEncoding:NSUTF8StringEncoding] options: NSJSONReadingMutableContainers error: &error]; NSLog(@"recieved dict %@",json); } }]; [request setFailedBlock:^ { //NEED RETURN FALSE //hide progress hud }]; //start sync [request setDelegate:self]; [request startAsynchronous]; }
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