PHP Gets HTTP header information

//get all HTTP request header information---function is only available for Apache or alias Apache_request_headers ()$is _headers=function_exists(' Getallheaders ');$headers=Array();if(!isset($is _headers) ) #如果是nginx {foreach($_server  as $key=$value)    {        if(' http_ ' = =substr($key, 0, 5)) {            $headers[Str_replace(‘_‘, ‘-‘,substr($key, 5))] =$value; }        if(isset($_server[' Php_auth_digest ']))        {            $header[' AUTHORIZATION '] =$_server[' Php_auth_digest ']; } ElseIf(isset($_server[' Php_auth_user ']) &&isset($_server[' PHP_AUTH_PW ']))        {            $header[' AUTHORIZATION '] =Base64_encode($_server[' Php_auth_user ']. ‘:‘ .$_server[' PHP_AUTH_PW ']); }        if(isset($_server[' Content_length '])) {            $header[' content-length '] =$_server[' Content_length ']; }        if(isset($_server[' Content_Type '])) {            $header[' content-type '] =$_server[' Content_Type ']; }    }}Else{    $headers=getallheaders();}Var_dump($headers);

Get HTTP response information:get_headers ($url, 1) # Get the server to respond to all headers sent by an HTTP request

PHP Gets HTTP header information