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    <p>There is an issue with your Objective-C code, in which you define your <code>Content-Type</code> header as <code>application/x-www-form-urlencoded</code>, but then the body of the request is not consistent with that <code>Content-Type</code>. You can, theoretically, write PHP code that handles the request as constructed (read the raw data of the body), but it's probably better to change the request to conform to established standards.</p> <p>If you write the code to construct such a request yourself, it's a little ugly (see the end of this answer), so I'd suggest using <a href="https://github.com/AFNetworking/AFNetworking" rel="nofollow">AFNetworking</a>, which greatly simplifies the creation of such requests:</p> <pre><code>NSData *zipData = [NSData dataWithContentsOfFile:zipFile]; AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager]; [manager POST:urlString parameters:nil constructingBodyWithBlock:^(id&lt;AFMultipartFormData&gt; formData) { [formData appendPartWithFileData:zipData name:@"file" fileName:[zipFile lastPathComponent] mimeType:@"application/zip"]; } success:^(AFHTTPRequestOperation *operation, id responseObject) { BOOL success = [responseObject[@"success"] boolValue]; NSString *errorMessage = responseObject[@"error"]; NSLog(@"Success: %d; Error message: %@", success, errorMessage); } failure:^(AFHTTPRequestOperation *operation, NSError *error) { NSLog(@"Error: %@", error); }]; </code></pre> <p>Note, this expects a JSON response, so the corresponding PHP code to receive it, save it into an "upload" subdirectory, and return JSON response might look like:</p> <pre><code>&lt;?php header("Content-Type: application/json"); $allowedExts = array("zip", "gz"); $extension = end(explode(".", $_FILES["file"]["name"])); if (in_array($extension, $allowedExts)) { if ($_FILES["file"]["error"] &gt; 0) { echo json_encode(array("success" =&gt; false, "error" =&gt; $_FILES["file"]["error"])); } else { if (file_exists("upload/" . $_FILES["file"]["name"])) { echo json_encode(array("success" =&gt; false, "error" =&gt; $_FILES["file"]["name"] . " already exists")); } else { move_uploaded_file($_FILES["file"]["tmp_name"], "upload/" . $_FILES["file"]["name"]); echo json_encode(array("success" =&gt; true)); } } } else { echo json_encode(array("success" =&gt; false, "error" =&gt; "Invalid file type")); } ?&gt; </code></pre> <hr> <p>While I'd really encourage you to use AFNetworking, if you want to construct your own request, you could do something like:</p> <pre><code>[self uploadFileAtPath:zipFile forField:@"file" URL:[NSURL URLWithString:urlString] parameters:nil completion:^(BOOL success, NSString *errorMessage) { NSLog(@"success = %d; errorMessage = %@", success, errorMessage); }]; </code></pre> <p>Where, <code>uploadFileAtPath</code> and some supporting methods are defined like so:</p> <pre><code>- (void)uploadFileAtPath:(NSString *)path forField:(NSString *)fieldName URL:(NSURL*)url parameters:(NSDictionary *)parameters completion:(void (^)(BOOL success, NSString *errorMessage))completion { NSString *filename = [path lastPathComponent]; NSData *data = [NSData dataWithContentsOfFile:path]; NSMutableData *httpBody = [NSMutableData data]; NSString *boundary = [self generateBoundaryString]; NSString *mimetype = [self mimeTypeForPath:path]; // configure the request NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:url]; [request setCachePolicy:NSURLRequestReloadIgnoringLocalCacheData]; [request setHTTPShouldHandleCookies:NO]; [request setTimeoutInterval:30]; [request setHTTPMethod:@"POST"]; // set content type NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary]; [request setValue:contentType forHTTPHeaderField: @"Content-Type"]; // add params (all params are strings) [parameters enumerateKeysAndObjectsUsingBlock:^(NSString *parameterKey, NSString *parameterValue, BOOL *stop) { [httpBody appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]]; [httpBody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", parameterKey] dataUsingEncoding:NSUTF8StringEncoding]]; [httpBody appendData:[[NSString stringWithFormat:@"%@\r\n", parameterValue] dataUsingEncoding:NSUTF8StringEncoding]]; }]; // add image data if (data) { [httpBody appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]]; [httpBody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"%@\"\r\n", fieldName, filename] dataUsingEncoding:NSUTF8StringEncoding]]; [httpBody appendData:[[NSString stringWithFormat:@"Content-Type: %@\r\n\r\n", mimetype] dataUsingEncoding:NSUTF8StringEncoding]]; [httpBody appendData:data]; [httpBody appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]]; } [httpBody appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]]; // setting the body of the post to the reqeust [request setHTTPBody:httpBody]; [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) { if (connectionError) { if (completion) completion(FALSE, [NSString stringWithFormat:@"%s: sendAsynchronousRequest error: %@", __FUNCTION__, connectionError]); return; } NSError *error = nil; NSDictionary *responseObject = [NSJSONSerialization JSONObjectWithData:data options:0 error:&amp;error]; if (!responseObject) { if (completion) completion(FALSE, [NSString stringWithFormat:@"%s: JSONObjectWithData error=%@", __FUNCTION__, error]); return; } BOOL success = [responseObject[@"success"] boolValue]; NSString *errorMessage = responseObject[@"error"]; if (completion) completion(success, errorMessage); }]; } - (NSString *)generateBoundaryString { // generate boundary string // // adapted from http://developer.apple.com/library/ios/#samplecode/SimpleURLConnections // // Note in iOS 6 and later, you can just: // // return [NSString stringWithFormat:@"Boundary-%@", [[NSUUID UUID] UUIDString]]; CFUUIDRef uuid; NSString *uuidStr; uuid = CFUUIDCreate(NULL); assert(uuid != NULL); uuidStr = CFBridgingRelease(CFUUIDCreateString(NULL, uuid)); assert(uuidStr != NULL); CFRelease(uuid); return [NSString stringWithFormat:@"Boundary-%@", uuidStr]; } - (NSString *)mimeTypeForPath:(NSString *)path { // get a mime type for an extension using MobileCoreServices.framework CFStringRef extension = (__bridge CFStringRef)[path pathExtension]; CFStringRef UTI = UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, extension, NULL); assert(UTI != NULL); NSString *mimetype = CFBridgingRelease(UTTypeCopyPreferredTagWithClass(UTI, kUTTagClassMIMEType)); assert(mimetype != NULL); CFRelease(UTI); return mimetype; } </code></pre>
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    1. POsend zip file from ios app to php server
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    1. COI dont want to use this way ,what is the wrong with my posted code?
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    2. CO@user2960510 Both the `$_POST` and the `$_FILES` server variables require that the request be well-formed HTTP `POST` request for the server to parse it. You cannot just put the `NSData` of your zip file in the body and then hope to use `$_POST` or `$_FILES`. That won't work. For example, how is your server going to know the name of the file being uploaded or the field name to use in the `$_POST` array? You could theoretically use PHP `fopen` (e.g. a variant of [this](http://stackoverflow.com/a/17023318/1271826)) to get the raw data, but I wouldn't recommend that for uploading zip files.
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    3. CO@user2960510 I'd be inclined to use the I'd suggest either the above, or create a JSON request where you base 64 encode the binary data (and then handle the JSON request as outlined [in that other post](http://stackoverflow.com/a/17023318/1271826)) and then have your PHP perform the `base64_decode` to get the binary data back out.
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