Get the full URL in PHP

 

I use this code to get the full URL: 

$actual_link = 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'];

The problem is that I use some masks in my .htaccess , so what we see in the URL is not always the real path of the file.

What I need is to get the URL, what is written in the URL, nothing more and nothing less—the full URL.

I need to get how it appears in the Navigation Bar in the web browser, and not the real path of the file on the server.

Have a look at $_SERVER['REQUEST_URI'] , ie 

$actual_link = "http://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";

(Note that the double quoted string syntax is perfectly correct)

If you want to support both HTTP and HTTPS, you can use 

$actual_link = (isset($_SERVER['HTTPS']) ? "https" : "http") . "://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";

Editor's note: using this code has security implications . The client can set HTTP_HOST and REQUEST_URI to any arbitrary value it wants.

Short version to output link on a webpage 

$url =  "//{$_SERVER['HTTP_HOST']}{$_SERVER['REQUEST_URI']}";

$escaped_url = htmlspecialchars( $url, ENT_QUOTES, 'UTF-8' );
echo '<a href="' . $escaped_url . '">' . $escaped_url . '</a>';

Here are some more details about the issues and edge cases of the //example.com/path/ format

Full version 

function url_origin( $s, $use_forwarded_host = false )
{
    $ssl      = ( ! empty( $s['HTTPS'] ) && $s['HTTPS'] == 'on' );
    $sp       = strtolower( $s['SERVER_PROTOCOL'] );
    $protocol = substr( $sp, 0, strpos( $sp, '/' ) ) . ( ( $ssl ) ? 's' : '' );
    $port     = $s['SERVER_PORT'];
    $port     = ( ( ! $ssl && $port=='80' ) || ( $ssl && $port=='443' ) ) ? '' : ':'.$port;
    $host     = ( $use_forwarded_host && isset( $s['HTTP_X_FORWARDED_HOST'] ) ) ? $s['HTTP_X_FORWARDED_HOST'] : ( isset( $s['HTTP_HOST'] ) ? $s['HTTP_HOST'] : null );
    $host     = isset( $host ) ? $host : $s['SERVER_NAME'] . $port;
    return $protocol . '://' . $host;
}

function full_url( $s, $use_forwarded_host = false )
{
    return url_origin( $s, $use_forwarded_host ) . $s['REQUEST_URI'];
}

$absolute_url = full_url( $_SERVER );
echo $absolute_url;

This is a heavily modified version of http://snipplr.com/view.php?codeview&id=2734 .

URL structure:

scheme:// username:password @domain:port/path?query_string# fragment_id

The parts in bold will not be included by the function

Notes:

  • This function does not include username:password from a full URL or the fragment (hash).
  • It will not show the default port 80 for HTTP and port 443 for HTTPS.
  • Only tested with http and https schemes.
  • The #fragment_id is not sent to the server by the client (browser) and will not be added to the full URL.
  • $_GET will only contain foo=bar2 for an URL like /example?foo=bar1&foo=bar2 .
  • Some CMS's and environments will rewrite $_SERVER['REQUEST_URI'] and return /example?foo=bar2 for an URL like /example?foo=bar1&foo=bar2 , use $_SERVER['QUERY_STRING'] in this case.
  • Keep in mind that an URI = URL + URN , but due to popular use, URL now means both URI and URL.
  • You should remove HTTP_X_FORWARDED_HOST if you do not plan to use proxies or balancers.
  • The spec says that the Host header must contain the port number unless it is the default number.

    • Client (Browser) controlled variables:

  • $_SERVER['REQUEST_URI'] . Any unsupported characters are encoded by the browser before they are sent.
  • $_SERVER['HTTP_HOST'] and is not always available according to comments in the PHP manual: http://php.net/manual/en/reserved.variables.php
  • $_SERVER['HTTP_X_FORWARDED_HOST'] gets set by balancers and is not mentioned in the list of $_SERVER variables in the PHP manual.

    • Server controlled variables:

  • $_SERVER['HTTPS'] . The client chooses to use this, but the server returns the actual value of either empty or "on".
  • $_SERVER['SERVER_PORT'] . The server only accepts allowed numbers as ports.
  • $_SERVER['SERVER_PROTOCOL'] . The server only accepts certain protocols.
  • $_SERVER['SERVER_NAME'] . It is set manually in the server configuration and is not available for IPv6 according to kralyk.

    • Related:

    HTTP_HOST vs. SERVER_NAME
    Is Port Number Required in HTTP "Host" Header Parameter?
    https://stackoverflow.com/a/28049503/175071

    对于这个问题，用print_r($_SERVER)查看整个数组，你会看到你需要的一切:)

    链接地址: http://www.djcxy.com/p/1122.html

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