PHP后台2:客户端(IOS/Android)Post请求以及JSON数据编解码

（1）IOS客户端Post请求＋PHP服务器Post响应

PHP服务器代码：

<?php

if($_POST) {

foreach($_POST as $index => $value)
echo "$_POST[$index] = $value",
"<BR>";

foreach($_GET as $index => $value)
echo "$index = $value",
"<BR>";
}

?>
IOS客户端代码：

NSString *urlAsString =
@"http://localhost/testPost.php?id=1&password=abc";



NSURL *url = [NSURL
URLWithString:urlAsString];



NSMutableURLRequest *urlRequest = [NSMutableURLRequest
requestWithURL:url];
[urlRequest
setTimeoutInterval:30.0f];
[urlRequest
setHTTPMethod:@"POST"];



NSString *body =
@"bodyParam1=BodyValue1&bodyParam2=BodyValue2";

[urlRequest setHTTPBody:[body
dataUsingEncoding:NSUTF8StringEncoding]];



NSOperationQueue *queue = [[NSOperationQueue
alloc]
init];



[NSURLConnection

sendAsynchronousRequest:urlRequest

queue:queue

completionHandler:^(NSURLResponse *response,

NSData *data,

NSError *error) {



if ([data length] >0 && error ==
nil){

NSString *html =
[[NSString
alloc] initWithData:data

encoding:NSUTF8StringEncoding];

NSLog(@"HTML = %@", html);
}
}

输出结果：

HTML = BodyValue1 = BodyValue1<BR>
BodyValue2 = BodyValue2<BR>
id = 1<BR>
password = abc<BR>
注意这里在发送Post请求的时候。并不是所有的数据都放在Post中，还有一部分是以Get的形式发送的，所以这里既打印出了Post的内容，也打印出了Get的内容。
（2）IOS客户端Post请求（Json）＋PHP服务器Post响应（Json编解码）

PHP服务器代码：

<?php

if($_POST) {
$dataJson = file_get_contents("php://input");
$dataContent = json_decode($dataJson, TRUE);

if($dataContent["id"] ==
"abc" && $dataContent["password"] ==
"123"){
$marray =
array();
$marray["name"] =
"apple";
$marray["price"] =
"15.8";
$mJsonContent = json_encode($marray);

echo
"$mJsonContent";
}
}

?>
IOS客户端代码：

NSString *urlAsString =
@"http://localhost/testPostJSONReturn.php";



NSURL *url = [NSURL
URLWithString:urlAsString];



NSMutableURLRequest *urlRequest = [NSMutableURLRequest
requestWithURL:url];
[urlRequest
setTimeoutInterval:30.0f];
[urlRequest
setHTTPMethod:@"POST"];

[urlRequest addValue:@"application/x-www-form-urlencoded"
forHTTPHeaderField:@"Content-Type"];

NSMutableDictionary * tempDic = [NSMutableDictionary
dictionary];
[tempDic
setValue:@"abc"
forKey:@"id"];
[tempDic
setValue:@"123"
forKey:@"password"];

NSData *postBody = [NSJSONSerialization
dataWithJSONObject:tempDic options:NSJSONWritingPrettyPrinted
error:nil];


[urlRequest
setHTTPBody:postBody];



NSOperationQueue *queue = [[NSOperationQueue
alloc]
init];



[NSURLConnection

sendAsynchronousRequest:urlRequest

queue:queue

completionHandler:^(NSURLResponse *response,

NSData *data,

NSError *error) {



if ([data length] >0 && error ==
nil){

id dic=[NSJSONSerialization
JSONObjectWithData:data options:NSJSONReadingMutableContainers
error:nil];

if([dic isKindOfClass:[NSArray
class]]){

NSLog(@"array");
}else
if([dic isKindOfClass:[NSDictionary
class]]){

NSLog(@"dic");

NSDictionary *mdic = (NSDictionary*)dic;

NSString *item = @"";

for (item in mdic.allKeys) {

NSLog(@"%@=%@",item,[mdic
valueForKey:item]);
}
}
}
}];
输出结果：

dic
name=apple
price=15.8
这里使用"php://input" 那么客户端的Content-Type 需要指定：application/x-www-form-urlencoded