How does the php server respond to post requests?

Simulate post request:

<?php
// 建立连接
$curl = curl_init();
//设置
$url = &#39;localhost&#39;;
curl_setopt($curl, CURLOPT_URL, $url);
# 设置开启post请求
curl_setopt($curl, CURLOPT_POST, $url);
$post_data = array(
    &#39;user_name&#39; => &#39;admin&#39;,
    &#39;user_pwd&#39; => &#39;123456&#39;
    );
curl_setopt($curl, CURLOPT_POSTFIELDS, $post_data);
//发送
var_dump(curl_exec($curl));
//关闭
curl_close($curl);

php responds to post request:

CURLOPT_RETURNTRANSFER: Whether to output the response directly or process it in the form of a return value
Process the response data in the form of a return value:

curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

POST file upload

Post data uses the file address, use the @ sign before the file instead of the string

$post_data = array('image' => '@c:/1.jpg');

Handle session COOKIE

CURLOPT_COOKIEFILE: Whether to send cookies

CURLOPT_COOKIEJAR: Specify the storage location of cookie variables set by the storage server

curl_setopt($curl, CURLOPT_COOKIEFILE, true);
curl_setopt($curl, CURLOPT_HEADER, 'c:/cookie.txt');

Processing response headers

CURLOPT_HEADER: Whether to obtain response header data

Get response header data:

curl_setopt($curl, CURLOPT_HEADER, true);

Operation response

Operation response header:

header() function

json：header("Content-type: application/json");
（ie6：header("Content-type: text/json");) picture ：header('Content-Type:image/jpeg');, header('Content-Type:image/png'); etc.; encoding: header("Content-type:text/html;Charset=utf-8") ;

Operation response body

Any output is the response body. (echo, print, var_dump, all HTML code outside PHP tags)

Control browser cache

header('Expires: ' . gmdate('D, d M Y H:i:s', time()+5) . ' GMT');

Expires: Expiration date (GMT: Greenwich Mean Time)

gmdate() Format the timestamp to Greenwich mean time

self";

Recommended reading: php server

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