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我正在嘗試將我的用戶名發送到服務器。特此是我的Objective-C代碼：從設備到服務器發佈數據
NSURL *postUrl=[NSURL URLWithString:@"http://yatanadam.com/Nappsak/checkTheUser.php"];
NSMutableURLRequest *request=[NSMutableURLRequest requestWithURL:postUrl cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0f];
NSString *[email protected]"userName=yatanadam";
NSData* data = [strData dataUsingEncoding:NSUTF8StringEncoding];
[request setHTTPMethod:@"POST"];
[request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[request setValue:[NSString stringWithFormat:@"%d",[data length]] forHTTPHeaderField:@"Content-Length"];
[request setHTTPBody:data];
NSURLResponse *response=nil;
NSError *error=nil;
NSData *result=[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSString *string = [[NSString alloc] initWithData:result encoding:NSUTF8StringEncoding];
if (error==nil) {
NSLog(@"%@",string);
}
，並在此我的PHP代碼：
<?php
$userName = $_POST["userName"];
echo $userName ;
$con = mysql_connect("localhost","username","password");
if (!$con)
{
$hata= "hata";
echo hata;
die('Baglanti saglanamadi: ' . mysql_error());
}mysql_select_db("yata", $con);
$degisken= "Select * from Users where user_name=$userName";
$showresult = mysql_query($degisken);
$multi_array = array();
while($row = mysql_fetch_assoc($showresult)){
$multi_array[] = $row;}
print json_encode($multi_array);
?>}
我在這個問題上幾個小時now.The的問題是我無法從服務器獲取正確的響應。我的服務器代碼無法捕捉到我的發佈數據（用戶名）。我存在任何可以幫助我的人哪裏是我的錯誤傢伙？