PHP发送GET和POST请求

发送GET请求

$url = "http://xxx.xxx.xxx.xxx";
$get_data = array ("output" => "json",
                "a" => "xxx",
                "b" => "xxx",
                "ak" => $ak,
                "origins" => $origins, 
                "destinations" => $destinations
                );

foreach ($get_data as $k => $v) {
     $data[] = $k.'='.$v;
}
$p_str = implode('&', $data);
$url .= '?'.$p_str;

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

$output = curl_exec($ch);
curl_close($ch);

$output_array = json_decode($output,true);

步骤：

1、先拼出url

2、使用curl一系列函数

3、得到结果之后使用json_decode函数进行json的解析，可以直接通过k-v的形式拿到值

发送POST请求

$url = "xxx.xxx.xxx.xxx";

$pieces1 = explode(",", $origins);
$pieces2 = explode(",", $destinations);

$params = json_encode(array
    (
    'xxx_list' => array
        (
            array(
                'xx1' => array(
                    'a' =>  intval($pieces1[0]),
                    'b' =>  intval($pieces1[1]) 
                ),
                'xx2' => array(
                    'c' =>  intval($pieces2[0]),
                    'd' =>  intval($pieces2[1])
                ),
                'xx3' => array(
                    'xx11' => $data['xx11'],
                    'xx22' => $data['xx22']
                )
            )
        ),
        'xxx_type' => 0
    )
);


$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    'Content-Type: application/json',
    'Content-Length: ' . strlen($params)
));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_POSTFIELDS, $params);

$res = curl_exec($ch);
curl_close($ch);

步骤：

1、构造params

2、使用curl一系列函数

curl中CURLOPT_POSTFIELDS参数就是设置body的内容，这里设置为post提交是用CURLOPT_CUSTOMREQUEST而不是CURLOPT_POST，根据官网的说明：
CURLOPT_POST：启用时会发送一个常规的POST请求，类型为：application/x-www-form-urlencoded，就像表单提交的一样。
因为是要发送json格式，所以不能用这个。

本文参考自：

http://www.01happy.com/php-send-post-request-body-is-json/

http://www.01happy.com/php-post-request-get-json-param/