PHP 获取 header 头信息

发现个不错的内置函数 获取网址的header头信息

get_headers($url,1);

---

array(16) {
  [0]=>
  string(18) "HTTP/1.1 302 Found"
  ["Date"]=>
  array(2) {
    [0]=>
    string(29) "Sun, 28 Jun 2020 08:46:05 GMT"
    [1]=>
    string(29) "Sun, 28 Jun 2020 08:46:06 GMT"
  }
  ["Content-Length"]=>
  string(1) "0"
  ["Connection"]=>
  array(2) {
    [0]=>
    string(5) "close"
    [1]=>
    string(5) "close"
  }
  ["P3P"]=>
  string(85) "CP="CURa ADMa DEVa PSAo PSDo OUR BUS UNI PUR INT DEM STA PRE COM NAV OTC NOI DSP COR""
  ["location"]=>
  string(177) "https://re.jd.com/cps/item/100004538398.html?wareId=100004538398&cu=true&utm_source=kong&utm_medium=tuiguang&utm_campaign=t_1000171945_&utm_term=ccd9809324d64f22bfe6995f54e0329a"
  ["set-cookie"]=>
  array(3) {
    [0]=>
    string(443) "CCC_SE=ADC_LrMnKke%2b3ixmw%2f6QevoGHtKt3TVzDk8bJDdbE2ezois6wMhuNqAhR%2fX0qT0ClA5ZJqGKFPggQzGV8V8C%2fyDCuzctb2131FaYKWeQvNktDZXuCnSjVl8cODV8%2fthJbhYu0XeJYUomOwXiey3WkcakuDEpc%2fFhSw819IecqU4kmgkJeREcBaWbZgwNvPHTj%2fadRDRjerDCBeBkiDmtAPZ8uhwlWDm95d%2f2KSqNK1qC0zQG%2b0FiVrlVpauFFNARtRFBzUI%2bzeAaBvQf2AdIpE7AVw7irGB4wz%2f0Mld3GyF5gsBAm2y5dQvL6DlJqFED4ICURj5G346Un8V%2f4AkCm9wRiFFCuznZkMOmX5umcnA48YEwSasQNJ2uhK5L5ExvR7dT; Path=/; Domain=.jd.com"
    [1]=>
    string(274) "unpl=V2_bzNtbRAFFh18CU5WeBwJAmJUEV4RABcSfQBCA38cCARlABoNclRCFnQUR1NnGlUUZwQZWEVcQhFFCEFkexhdBGcFElVHU3MlRQtGZHopbDVgAxttQlZCFHQNQlZyG1QMVwATXUdQRxB1D1pSfx5aBm8zE21DZ0IlI2ZGVXoYXQRkCxtVD2dCJXY%3d; Max-Age=2592000; Expires=Tue, 28 Jul 2020 08:46:05 GMT; Path=/; Domain=.jd.com"
    [2]=>
    string(179) "unionuuid=V2_ZABFCEdQShF8D0YDfh8JADRREVhGB0UTcQ8VBixNVAUIABNeQ1ZEFnwIQVF8GFhqZwUSQkJTXBJ3F0VWcwxJ; Max-Age=31536000; Expires=Mon, 28 Jun 2021 08:46:05 GMT; Path=/; Domain=u.jd.com"
  }
  ["Server"]=>
  array(2) {
    [0]=>
    string(3) "jfe"
    [1]=>
    string(3) "jfe"
  }
  ["Strict-Transport-Security"]=>
  array(2) {
    [0]=>
    string(15) "max-age=7776000"
    [1]=>
    string(15) "max-age=7776000"
  }
  [1]=>
  string(15) "HTTP/1.1 200 OK"
  ["Content-Type"]=>
  string(23) "text/html;charset=UTF-8"
  ["Vary"]=>
  string(15) "Accept-Encoding"
  ["Set-Cookie"]=>
  array(2) {
    [0]=>
    string(106) "_reuuid=fda592dfee6a435ba382cb46f80f3d08; Domain=.re.jd.com; Expires=Mon, 28-Jun-2021 08:46:05 GMT; Path=/"
    [1]=>
    string(144) "re_mbp=CAwQ0qbruQcaIGNjZDk4MDkzMjRkNjRmMjJiZmU2OTk1ZjU0ZTAzMjlhIABCAnJtWiBjY2Q5ODA5MzI0ZDY0ZjIyYmZlNjk5NWY1NGUwMzI5YQ; Domain=.re.jd.com; Path=/"
  }
  ["Content-Language"]=>
  string(5) "zh-CN"
  ["Expires"]=>
  string(29) "Sun, 28 Jun 2020 08:46:06 GMT"
  ["Cache-Control"]=>
  string(9) "max-age=0"
}