如何从绝对文件路径获取文件的 url 路径 - 将绝对路径转换为 ​​url 路径 - PHP

Question

I have stored images path as absolute file path on server disk:

/var/www/u1234567/data/www/somesampledomain.xyz/mediaimages/48fa6c736b75e1da485656e97b7d76f9.png

I want to convert this absolute path -> to url path like:

https://somesampledomain.xyz/mediaimages/48fa6c736b75e1da485656e97b7d76f9.png

I can just trim this unnessesary part with /var/www... . But is there some more univirsal way, without the hardcode part with /var/www/u1234567/data/www/ ?

Answer 1

I find it useful to have something like the below in the global config file:

define('BASE_DIR', '/var/www/u1234567/data/www/somesampledomain.xyz/');
define('BASE_URL', 'https://somesampledomain.xyz/');

Which is useful for translating urls and paths, in various places. Though for simplicity it's usually more like:

define('BASE_DIR', realpath('../htdocs/'));

Then you can:

$path = '/var/www/u1234567/data/www/somesampledomain.xyz/mediaimages/48fa6c736b75e1da485656e97b7d76f9.png';
$url  = 'https://somesampledomain.xyz/mediaimages/48fa6c736b75e1da485656e97b7d76f9.png';

function path_to_url($path) {
    return preg_replace('/^'.preg_quote(BASE_DIR, '/').'/', BASE_URL, $path, 1);
}

function url_to_path($url) {
    return preg_replace('/^'.preg_quote(BASE_URL, '/').'/', BASE_DIR, $url, 1);
}

var_dump(
    $url,
    path_to_url($path),
    $path,
    url_to_path($url)
);

Output:

string(77) "https://somesampledomain.xyz/mediaimages/48fa6c736b75e1da485656e97b7d76f9.png"
string(77) "https://somesampledomain.xyz/mediaimages/48fa6c736b75e1da485656e97b7d76f9.png"
string(96) "/var/www/u1234567/data/www/somesampledomain.xyz/mediaimages/48fa6c736b75e1da485656e97b7d76f9.png"
string(96) "/var/www/u1234567/data/www/somesampledomain.xyz/mediaimages/48fa6c736b75e1da485656e97b7d76f9.png"

Ref:

• https://www.php.net/manual/en/function.realpath
• https://www.php.net/manual/en/function.preg-replace
• https://www.php.net/manual/en/function.preg-quote

Answer 2

You can use this simple php script

<?php
$link = (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on' ? "https" : "http") . "://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";
echo("$link");
?>

It will show your full website url with current file like: http://site .com/file.php