php 使用PHP将相对路径转换为绝对URL
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Transform relative path into absolute URL using PHP
提问by Paul
How to, using php, transform relative path to absolute URL?
如何使用 php 将相对路径转换为绝对 URL？
回答by jordanstephens
function rel2abs($rel, $base)
{
/* return if already absolute URL */
if (parse_url($rel, PHP_URL_SCHEME) != '') return $rel;
/* queries and anchors */
if ($rel[0]=='#' || $rel[0]=='?') return $base.$rel;
/* parse base URL and convert to local variables:
$scheme, $host, $path */
extract(parse_url($base));
/* remove non-directory element from path */
$path = preg_replace('#/[^/]*$#', '', $path);
/* destroy path if relative url points to root */
if ($rel[0] == '/') $path = '';
/* dirty absolute URL */
$abs = "$host$path/$rel";
/* replace '//' or '/./' or '/foo/../' with '/' */
$re = array('#(/\.?/)#', '#/(?!\.\.)[^/]+/\.\./#');
for($n=1; $n>0; $abs=preg_replace($re, '/', $abs, -1, $n)) {}
/* absolute URL is ready! */
return $scheme.'://'.$abs;
}
回答by Mikey A. Leonetti
I love the code that jordanstephens provided from the link! I voted it up. l0oky inspired me to make sure that the function is port, username, and password URL compatible. I needed it for my project.
我喜欢 jordanstephens 从链接中提供的代码！我投了赞成票。l0oky 启发我确保该函数与端口、用户名和密码 URL 兼容。我的项目需要它。
function rel2abs( $rel, $base )
{
/* return if already absolute URL */
if( parse_url($rel, PHP_URL_SCHEME) != '' )
return( $rel );
/* queries and anchors */
if( $rel[0]=='#' || $rel[0]=='?' )
return( $base.$rel );
/* parse base URL and convert to local variables:
$scheme, $host, $path */
extract( parse_url($base) );
/* remove non-directory element from path */
$path = preg_replace( '#/[^/]*$#', '', $path );
/* destroy path if relative url points to root */
if( $rel[0] == '/' )
$path = '';
/* dirty absolute URL */
$abs = '';
/* do we have a user in our URL? */
if( isset($user) )
{
$abs.= $user;
/* password too? */
if( isset($pass) )
$abs.= ':'.$pass;
$abs.= '@';
}
$abs.= $host;
/* did somebody sneak in a port? */
if( isset($port) )
$abs.= ':'.$port;
$abs.=$path.'/'.$rel;
/* replace '//' or '/./' or '/foo/../' with '/' */
$re = array('#(/\.?/)#', '#/(?!\.\.)[^/]+/\.\./#');
for( $n=1; $n>0; $abs=preg_replace( $re, '/', $abs, -1, $n ) ) {}
/* absolute URL is ready! */
return( $scheme.'://'.$abs );
}
回答by Josh
Added support to keep the current query. Helps a lot for ?page=1 and so on...
添加了保留当前查询的支持。对 ?page=1 等有很大帮助...
function rel2abs($rel, $base)
{
/* return if already absolute URL */
if (parse_url($rel, PHP_URL_SCHEME) != '')
return ($rel);
/* queries and anchors */
if ($rel[0] == '#' || $rel[0] == '?')
return ($base . $rel);
/* parse base URL and convert to local variables: $scheme, $host, $path, $query, $port, $user, $pass */
extract(parse_url($base));
/* remove non-directory element from path */
$path = preg_replace('#/[^/]*$#', '', $path);
/* destroy path if relative url points to root */
if ($rel[0] == '/')
$path = '';
/* dirty absolute URL */
$abs = '';
/* do we have a user in our URL? */
if (isset($user)) {
$abs .= $user;
/* password too? */
if (isset($pass))
$abs .= ':' . $pass;
$abs .= '@';
}
$abs .= $host;
/* did somebody sneak in a port? */
if (isset($port))
$abs .= ':' . $port;
$abs .= $path . '/' . $rel . (isset($query) ? '?' . $query : '');
/* replace '//' or '/./' or '/foo/../' with '/' */
$re = ['#(/\.?/)#', '#/(?!\.\.)[^/]+/\.\./#'];
for ($n = 1; $n > 0; $abs = preg_replace($re, '/', $abs, -1, $n)) {
}
/* absolute URL is ready! */
return ($scheme . '://' . $abs);
}
回答by s3v3n
Wasn't in fact the question about converting path and not url? PHP actually has a function for this: realpath(). The only thing you should be aware of are symlinks.
实际上不是关于转换路径而不是网址的问题吗？PHP 实际上有一个函数：realpath()。您唯一应该注意的是符号链接。
Example from PHP manual:
PHP 手册中的示例：
chdir('/var/www/');
echo realpath('./../../etc/passwd') . PHP_EOL;
// Prints: /etc/passwd
echo realpath('/tmp/') . PHP_EOL;
// Prints: /tmp
回答by John
I updated the function to fix relative URL starting with '//' improving execution speed.
我更新了函数以修复以“//”开头的相对 URL，从而提高了执行速度。
function getAbsoluteUrl($relativeUrl, $baseUrl){
// if already absolute URL
if (parse_url($relativeUrl, PHP_URL_SCHEME) !== null){
return $relativeUrl;
}
// queries and anchors
if ($relativeUrl[0] === '#' || $relativeUrl[0] === '?'){
return $baseUrl.$relativeUrl;
}
// parse base URL and convert to: $scheme, $host, $path, $query, $port, $user, $pass
extract(parse_url($baseUrl));
// if base URL contains a path remove non-directory elements from $path
if (isset($path) === true){
$path = preg_replace('#/[^/]*$#', '', $path);
}
else {
$path = '';
}
// if realtive URL starts with //
if (substr($relativeUrl, 0, 2) === '//'){
return $scheme.':'.$relativeUrl;
}
// if realtive URL starts with /
if ($relativeUrl[0] === '/'){
$path = null;
}
$abs = null;
// if realtive URL contains a user
if (isset($user) === true){
$abs .= $user;
// if realtive URL contains a password
if (isset($pass) === true){
$abs .= ':'.$pass;
}
$abs .= '@';
}
$abs .= $host;
// if realtive URL contains a port
if (isset($port) === true){
$abs .= ':'.$port;
}
$abs .= $path.'/'.$relativeUrl.(isset($query) === true ? '?'.$query : null);
// replace // or /./ or /foo/../ with /
$re = ['#(/\.?/)#', '#/(?!\.\.)[^/]+/\.\./#'];
for ($n = 1; $n > 0; $abs = preg_replace($re, '/', $abs, -1, $n)) {
}
// return absolute URL
return $scheme.'://'.$abs;
}
回答by m908070
function url_to_absolute($baseURL, $relativeURL) {
$relativeURL_data = parse_url($relativeURL);
if (isset($relativeURL_data['scheme'])) {
return $relativeURL;
}
$baseURL_data = parse_url($baseURL);
if (!isset($baseURL_data['scheme'])) {
return $relativeURL;
}
$absoluteURL_data = $baseURL_data;
if (isset($relativeURL_data['path']) && $relativeURL_data['path']) {
if (substr($relativeURL_data['path'], 0, 1) == '/') {
$absoluteURL_data['path'] = $relativeURL_data['path'];
} else {
$absoluteURL_data['path'] = (isset($absoluteURL_data['path']) ? preg_replace('#[^/]*$#', '', $absoluteURL_data['path']) : '/') . $relativeURL_data['path'];
}
if (isset($relativeURL_data['query'])) {
$absoluteURL_data['query'] = $relativeURL_data['query'];
} else if (isset($absoluteURL_data['query'])) {
unset($absoluteURL_data['query']);
}
} else {
$absoluteURL_data['path'] = isset($absoluteURL_data['path']) ? $absoluteURL_data['path'] : '/';
if (isset($relativeURL_data['query'])) {
$absoluteURL_data['query'] = $relativeURL_data['query'];
} else if (isset($absoluteURL_data['query'])) {
$absoluteURL_data['query'] = $absoluteURL_data['query'];
}
}
if (isset($relativeURL_data['fragment'])) {
$absoluteURL_data['fragment'] = $relativeURL_data['fragment'];
} else if (isset($absoluteURL_data['fragment'])) {
unset($absoluteURL_data['fragment']);
}
$absoluteURL_path = ltrim($absoluteURL_data['path'], '/');
$absoluteURL_path_parts = array();
for ($i = 0, $i2 = 0; $i < strlen($absoluteURL_path); $i++) {
if (isset($absoluteURL_path_parts[$i2])) {
$absoluteURL_path_parts[$i2] .= $absoluteURL_path[$i];
} else {
$absoluteURL_path_parts[$i2] = $absoluteURL_path[$i];
}
if ($absoluteURL_path[$i] == '/') {
$i2++;
}
}
reset($absoluteURL_path_parts);
while (true) {
if (rtrim(current($absoluteURL_path_parts), '/') == '.') {
unset($absoluteURL_path_parts[key($absoluteURL_path_parts)]);
continue;
} else if (rtrim(current($absoluteURL_path_parts), '/') == '..') {
if (prev($absoluteURL_path_parts) !== false) {
unset($absoluteURL_path_parts[key($absoluteURL_path_parts)]);
} else {
reset($absoluteURL_path_parts);
}
unset($absoluteURL_path_parts[key($absoluteURL_path_parts)]);
continue;
}
if (next($absoluteURL_path_parts) === false) {
break;
}
}
$absoluteURL_data['path'] = '/' . implode('', $absoluteURL_path_parts);
$absoluteURL = isset($absoluteURL_data['scheme']) ? $absoluteURL_data['scheme'] . ':' : '';
$absoluteURL .= (isset($absoluteURL_data['user']) || isset($absoluteURL_data['host'])) ? '//' : '';
$absoluteURL .= isset($absoluteURL_data['user']) ? $absoluteURL_data['user'] : '';
$absoluteURL .= isset($absoluteURL_data['pass']) ? ':' . $absoluteURL_data['pass'] : '';
$absoluteURL .= isset($absoluteURL_data['user']) ? '@' : '';
$absoluteURL .= isset($absoluteURL_data['host']) ? $absoluteURL_data['host'] : '';
$absoluteURL .= isset($absoluteURL_data['port']) ? ':' . $absoluteURL_data['port'] : '';
$absoluteURL .= isset($absoluteURL_data['path']) ? $absoluteURL_data['path'] : '';
$absoluteURL .= isset($absoluteURL_data['query']) ? '?' . $absoluteURL_data['query'] : '';
$absoluteURL .= isset($absoluteURL_data['fragment']) ? '#' . $absoluteURL_data['fragment'] : '';
return $absoluteURL;
}
回答by Aaron Gillion
This function will resolve relative URL's to a givencurrent page url in $pgurlwithout regex. It successfully resolves:
此函数将在没有 regex 的情况下将相对 URL 解析为给定的当前页面 url 。它成功解决：$pgurl
/home.php?exampletypes,
/home.php?example类型，
same-dir nextpage.phptypes,
相同目录nextpage.php类型，
../...../.../parentdirtypes,
../...../.../parentdir类型，
full http://example.neturls,
完整的http://example.net网址，
and shorthand //example.neturls
和速记//example.net网址
//Current base URL (you can dynamically retrieve from $_SERVER)
$pgurl = 'http://example.com/scripts/php/absurl.php';
function absurl($url) {
global $pgurl;
if(strpos($url,'://')) return $url; //already absolute
if(substr($url,0,2)=='//') return 'http:'.$url; //shorthand scheme
if($url[0]=='/') return parse_url($pgurl,PHP_URL_SCHEME).'://'.parse_url($pgurl,PHP_URL_HOST).$url; //just add domain
if(strpos($pgurl,'/',9)===false) $pgurl .= '/'; //add slash to domain if needed
return substr($pgurl,0,strrpos($pgurl,'/')+1).$url; //for relative links, gets current directory and appends new filename
}
function nodots($path) { //Resolve dot dot slashes, no regex!
$arr1 = explode('/',$path);
$arr2 = array();
foreach($arr1 as $seg) {
switch($seg) {
case '.':
break;
case '..':
array_pop($arr2);
break;
case '...':
array_pop($arr2); array_pop($arr2);
break;
case '....':
array_pop($arr2); array_pop($arr2); array_pop($arr2);
break;
case '.....':
array_pop($arr2); array_pop($arr2); array_pop($arr2); array_pop($arr2);
break;
default:
$arr2[] = $seg;
}
}
return implode('/',$arr2);
}
Usage Example:
用法示例：
echo nodots(absurl('../index.html'));
nodots()must be called afterthe URL is converted to absolute.
nodots()必须在 URL 转换为绝对后调用。
The dots function is kind of redundant, but is readable, fast, doesn't use regex's, and will resolve 99% of typical urls (if you want to be 100% sure, just extend the switch block to support 6+ dots, although I've never seen that many dots in a URL).
dots 函数有点多余，但可读、快速、不使用正则表达式，并且可以解析 99% 的典型 url（如果你想 100% 确定，只需扩展 switch 块以支持 6+ 点，尽管我从未在 URL 中看到过那么多点）。
Hope this helps,
希望这可以帮助，
回答by superruzafa
If the relative directory already exists this will do the job:
如果相对目录已经存在，这将完成这项工作：
function rel2abs($relPath, $baseDir = './')
{
if ('' == trim($path))
{
return $baseDir;
}
$currentDir = getcwd();
chdir($baseDir);
$path = realpath($path);
chdir($currentDir);
return $path;
}
回答by Muhamed Krli?
I used the same code from: http://nashruddin.com/PHP_Script_for_Converting_Relative_to_Absolute_URLbut I modified It a little bit so If base url contains PORT number it returns the relative URL with port number in it.
我使用了来自：http: //nashruddin.com/PHP_Script_for_Converting_Relative_to_Absolute_URL的相同代码， 但我对其进行了一些修改，因此如果基本 url 包含端口号，则它返回带有端口号的相对 URL。
function rel2abs($rel, $base)
{
/* return if already absolute URL */
if (parse_url($rel, PHP_URL_SCHEME) != '') return $rel;
/* queries and anchors */
if ($rel[0]=='#' || $rel[0]=='?') return $base.$rel;
/* parse base URL and convert to local variables:
$scheme, $host, $path */
extract(parse_url($base));
/* remove non-directory element from path */
$path = preg_replace('#/[^/]*$#', '', $path);
/* destroy path if relative url points to root */
if ($rel[0] == '/') $path = '';
/* dirty absolute URL // with port number if exists */
if (parse_url($base, PHP_URL_PORT) != ''){
$abs = "$host:".parse_url($base, PHP_URL_PORT)."$path/$rel";
}else{
$abs = "$host$path/$rel";
}
/* replace '//' or '/./' or '/foo/../' with '/' */
$re = array('#(/\.?/)#', '#/(?!\.\.)[^/]+/\.\./#');
for($n=1; $n>0; $abs=preg_replace($re, '/', $abs, -1, $n)) {}
/* absolute URL is ready! */
return $scheme.'://'.$abs;
}
Hope this helps someone!
希望这可以帮助某人！
