(PHP 8 >= 8.4.0)
http_get_last_response_headers — Recupera os últimos cabeçalhos de reposta HTTP
Retorna um array contendo os últimos cabeçalhos de resposta HTTP
recebidos através do
empacotador HTTP.
Se não houver nenhum, retorna null.
Esta função não possui parâmetros.
Retorna um array indexado de cabeçalhos HTTP
que foram recebidos ao usar o
empacotador HTTP.
Se não houver nenhum, retorna null.
Exemplo #1 Exemplo de http_get_last_response_headers()
Obtendo os cabeçalhos de exemplo.com.br
<?php
file_get_contents("http://examplo.com.br");
var_dump(http_get_last_response_headers());
?>O exemplo acima produzirá algo semelhante a:
array(14) {
[0]=>
string(15) "HTTP/1.1 200 OK"
[1]=>
string(20) "Accept-Ranges: bytes"
[2]=>
string(11) "Age: 326940"
[3]=>
string(29) "Cache-Control: max-age=604800"
[4]=>
string(38) "Content-Type: text/html; charset=UTF-8"
[5]=>
string(35) "Date: Mon, 11 Nov 2024 13:34:09 GMT"
[6]=>
string(23) "Etag: "3147526947+gzip""
[7]=>
string(38) "Expires: Mon, 18 Nov 2024 13:34:09 GMT"
[8]=>
string(44) "Last-Modified: Thu, 17 Oct 2019 07:18:26 GMT"
[9]=>
string(24) "Server: ECAcc (nyd/D16C)"
[10]=>
string(21) "Vary: Accept-Encoding"
[11]=>
string(12) "X-Cache: HIT"
[12]=>
string(20) "Content-Length: 1256"
[13]=>
string(17) "Connection: close"
}
If you need code that works for both PHP 8 and earlier, and don't want lint warnings in PHP >= 8 because the presence of $http_response_header triggers them:
$headers = (function_exists('http_get_last_response_headers'))
? http_get_last_response_headers()
: (${'http_response_header'} ?? null);You cannot polyfill http_get_last_response_headers because the $http_response_header has to be in scope for it to be read. As soon as you put it in a function, it's out of scope.See this for a http_get_last_response_headers() pollyfill alike solution:
https://www.php.net/manual/en/reserved.variables.httpresponseheader.php#130563For PHP versions < 8.4, you can write a polyfill to be prepared for the future:
if ( ! function_exists("http_get_last_response_headers") ) {
function http_get_last_response_headers() {
if ( ! isset($http_response_header) ) {
return null;
}
return $http_response_header;
}
}