Having problems getting my JSON from iOS to post to my php file & insert into mySQL -

i have looked on numerous threads , unable me code work, have php file have used receive json android device , insert values mysql

 <?php include_once './db_functions.php'; //create object db_functions clas $db = new db_functions();  //get json posted android application $json = $_post["usersjson"]; //remove slashes if (get_magic_quotes_gpc()){ $json = stripslashes($json); } //decode json array $data = json_decode($json); //util arrays create response json $a=array(); $b=array();   //loop through array , insert data read json mysql db for($i=0; $i<count($data) ; $i++) { //store user mysql db $res = $db->storechecklist($data[$i]->customername, $data[$i]->address, $data[$i]->date,$data[$i]->device,$data[$i]->operator,$data[$i]->installer,$data[$i]->complete,$data[$i]->check1,$data[$i]->check2,$data[$i]->check3,$data[$i]->check4,$data[$i]->column_check5,$data[$i]->check6,$data[$i]->check7,$data[$i]->check8,$data[$i]->check9,$data[$i]->check10,$data[$i]->check11,$data[$i]->check12,$data[$i]->check13,$data[$i]->lite_id,$data[$i]->user,$data[$i]->syncid,$data[$i]->photo1,$data[$i]->photo2,$data[$i]->photo3,$data[$i]->photo4,$data[$i]->photo1b,$data[$i]->photo2b,$data[$i]->photo3b,$data[$i]->photo4b,$data[$i]->completed_by);     //based on inserttion, create json response if($res){     //$b["id"] = $data[$i]->column_id;         $b["status"] = 'yes';         array_push($a,$b);     }else{     //  $b["id"] = $data[$i]->column_id;         $b["status"] = 'no';         array_push($a,$b);     } }    //post json response android application echo json_encode($a);   ?> 

the code trying in ios following:

nsdictionary *dict = @{@"customername" : self.txtcustomername.text,                        @"address" : self.txtlocation.text, @"date" : self.txtdate.text, @"device" : self.txtdevice.text, @"operator" : self.txtoperator.text, @"installer" : self.txtinstaller.text, @"complete" : self.txtdatecomplete.text, @"check1" : self.txtcheck1.text, @"check2" : self.txtcheck2.text, @"check3" : self.txtcheck3.text, @"check4" : self.txtcheck4.text, @"check5" : self.txtcheck5.text, @"check6" : self.txtcheck6.text, @"check7" : self.txtcheck7.text, @"check8" : self.txtcheck8.text, @"check9" : self.txtcheck9.text, @"check10" : self.txtcheck10.text, @"check11" : self.txtcheck11.text, @"check12" : self.txtcheck12.text, @"check13" : self.txtcheck13.text, @"lite_id" : self.txtuniqueid.text, @"user" : self.txtuser.text, @"syncid" : self.txtsyncid.text, @"photo1" : self.txtphoto1.text, @"photo2" : self.txtphoto2.text, @"photo3" : self.txtphoto3.text, @"photo4" : self.txtphoto4.text, @"photo1b" : @"blank", @"photo2b" : @"blank", @"photo3b" : @"blank", @"photo4b" : @"blank" ,@"completed_by" : self.txtemployee.text                        // ,@"array" : arrayofobjects                        };  nserror *error = nil; nsdata *json;  // dictionary convertable json ? if ([nsjsonserialization isvalidjsonobject:dict]) {     // serialize dictionary     json = [nsjsonserialization datawithjsonobject:dict options:0 error:null];      // if no errors, let's view json     if (json != nil && error == nil)     {          nsstring *jsonstring = [[nsstring alloc] initwithdata:json encoding:nsutf8stringencoding];          nsstring *querystring = [nsstring stringwithformat:@"http://myurlhere.com/insertchecklist.php=%@", jsonstring];         nsmutableurlrequest *therequest=[nsmutableurlrequest                                          requestwithurl:[nsurl urlwithstring:                                                          querystring]                                          cachepolicy:nsurlrequestuseprotocolcachepolicy                                          timeoutinterval:60.0];         [therequest sethttpmethod:@"post"];         nsstring *post = [nsstring stringwithformat:@"usersjson=%@", jsonstring];         nsdata *postdata = [post datausingencoding:nsasciistringencoding];         [therequest sethttpbody:postdata];         nsurlconnection *con = [[nsurlconnection alloc] initwithrequest:therequest delegate:self];         if (con) {          //   _receiveddata=[nsmutabledata data];             nslog(@"it connected");         } else {             //something bad happened             nslog(@"something bad happend");         }           nslog(@"usersjson: %@", jsonstring);         //   [jsonstring release];     } 

any appreciated. have been able data php , save ios sqlite, having trouble going other way,

json should encoded in utf-8, utf-16 or utf-32.

so use nsutf8stringencoding instead of nsasciistringencoding.

nsdata *postdata = [post datausingencoding:nsutf8stringencoding]; 

it wouldn't hurt set content-type application/json either.

[therequest setvalue:@"application/json" forhttpheaderfield:@"content-type"];