realpath

(PHP 4, PHP 5, PHP 7)

realpath — Returns canonicalized absolute pathname

Description

string realpath ( string $path )

realpath() expands all symbolic links and resolves references to '/./', '/../' and extra '/' characters in the input path and returns the canonicalized absolute pathname.

Parameters

path

The path being checked.

Note:
Whilst a path must be supplied, the value can be blank or NULL In these cases, the value is interpreted as the current directory.

Return Values

Returns the canonicalized absolute pathname on success. The resulting path will have no symbolic link, '/./' or '/../' components. Trailing delimiters, such as \ and /, are also removed.

realpath() returns FALSE on failure, e.g. if the file does not exist.

Note:
The running script must have executable permissions on all directories in the hierarchy, otherwise realpath() will return FALSE.

Note:
For case-insensitive filesystems realpath() may or may not normalize the character case.

Note: Because PHP's integer type is signed and many platforms use 32bit integers, some filesystem functions may return unexpected results for files which are larger than 2GB.

Changelog

Version	Description
5.3.0	Prior to this release, if only the last `path` component did not exist, realpath() would not fail on BSD systems. realpath()* now fails in this case.
5.2.1	Prior to this version, realpath() returned `FALSE` if `path` is an empty string or `NULL`.

Examples

Example #1 realpath() example


<?php
chdir('/var/www/');
echo realpath('./../../etc/passwd') . PHP_EOL;

echo realpath('/tmp/') . PHP_EOL;
?>

The above example will output:

/etc/passwd
/tmp

Example #2 realpath() on Windows

On windows realpath() will change unix style paths to windows style.


<?php
echo realpath('/windows/system32');

echo realpath('C:\Program Files\\');
?>

The above example will output:

C:\WINDOWS\System32
C:\Program Files

User Contributed Notes

runeimp at gmail dot com

2 years ago


Needed a method to normalize a virtual path that could handle .. references that go beyond the initial folder reference. So I created the following.
<?php

function normalizePath($path)
{
    $parts = array();// Array to build a new path from the good parts
    $path = str_replace('\\', '/', $path);// Replace backslashes with forwardslashes
    $path = preg_replace('/\/+/', '/', $path);// Combine multiple slashes into a single slash
    $segments = explode('/', $path);// Collect path segments
    $test = '';// Initialize testing variable
    foreach($segments as $segment)
    {
        if($segment != '.')
        {
            $test = array_pop($parts);
            if(is_null($test))
                $parts[] = $segment;
            else if($segment == '..')
            {
                if($test == '..')
                    $parts[] = $test;

                if($test == '..' || $test == '')
                    $parts[] = $segment;
            }
            else
            {
                $parts[] = $test;
                $parts[] = $segment;
            }
        }
    }
    return implode('/', $parts);
}
?>

Will convert /path/to/test/.././..//..///..///../one/two/../three/filename
to ../../one/three/filename

Anonymous

3 years ago


Note: If you use this to check if a file exists, it's path will be cached, and returns true even if the file is removed (use file_exists instead).

Sven Arduwie

7 years ago


Because realpath() does not work on files that do not
exist, I wrote a function that does.
It replaces (consecutive) occurences of / and \\ with
whatever is in DIRECTORY_SEPARATOR, and processes /. and /.. fine.
Paths returned by get_absolute_path() contain no
(back)slash at position 0 (beginning of the string) or
position -1 (ending)
<?php
    function get_absolute_path($path) {
        $path = str_replace(array('/', '\\'), DIRECTORY_SEPARATOR, $path);
        $parts = array_filter(explode(DIRECTORY_SEPARATOR, $path), 'strlen');
        $absolutes = array();
        foreach ($parts as $part) {
            if ('.' == $part) continue;
            if ('..' == $part) {
                array_pop($absolutes);
            } else {
                $absolutes[] = $part;
            }
        }
        return implode(DIRECTORY_SEPARATOR, $absolutes);
    }
?>

A test:
<?php
    var_dump(get_absolute_path('this/is/../a/./test/.///is'));
?>
Returns: string(14) "this/a/test/is" 

As you can so, it also produces Yoda-speak. :)

imagiro

4 years ago


Here is a small and handy method to calculate the relative path from $from to $to. Note: On Windows it does not work when $from and $to are on different drives.

<?php
function relativePath($from, $to, $ps = DIRECTORY_SEPARATOR)
{
  $arFrom = explode($ps, rtrim($from, $ps));
  $arTo = explode($ps, rtrim($to, $ps));
  while(count($arFrom) && count($arTo) && ($arFrom[0] == $arTo[0]))
  {
    array_shift($arFrom);
    array_shift($arTo);
  }
  return str_pad("", count($arFrom) * 3, '..'.$ps).implode($ps, $arTo);
}
?>

Jrg Wagner

5 years ago


Please be aware that this function does NOT always strip a trailing slash!:

LINUX (tested with PHP 5.2.11):
---
realpath('.')
: string = "/myhttpdfolder" 
realpath('./')
: string = "/myhttpdfolder" 
realpath('fileadmin')
: string = "/myhttpdfolder/fileadmin" 
realpath('fileadmin/')
: string = "/myhttpdfolder/fileadmin" 

WINDOWS (tested with PHP 5.2.5):
---
realpath('.')
: string = "C:\\myhttpdfolder" 
realpath('./')
: string = "C:\\myhttpdfolder\\" 
realpath('fileadmin')
: string = "C:\\myhttpdfolder\\fileadmin" 
realpath('fileadmin/')
: string = "C:\\myhttpdfolder\\fileadmin\\"

David Beck

9 years ago


Here's a function to canonicalize a URL containing relative paths. Ran into the problem when pulling links from a remote page.

<?php

function canonicalize($address)
{
    $address = explode('/', $address);
    $keys = array_keys($address, '..');

    foreach($keys AS $keypos => $key)
    {
        array_splice($address, $key - ($keypos * 2 + 1), 2);
    }

    $address = implode('/', $address);
    $address = str_replace('./', '', $address);
}

$url = 'http://www.example.com/something/../else';
echo canonicalize($url); //http://www.example.com/else

?>

pulstar at ig dot com dot br

11 years ago


Sometimes you may need to refer to the absolute path of a file in your website instead of a relative path, but the realpath() function returns the path relative to the server's filesystem, not a path relative to your website root directory. 

For example, realpath() may return something like this:

/home/yoursite/public_html/dir1/file.ext

You can't use this in an HTML document, because the web server will not find the file. To do so, you can use:

<?php

function htmlpath($relative_path) {
    $realpath=realpath($relative_path);
    $htmlpath=str_replace($_SERVER['DOCUMENT_ROOT'],'',$realpath);
    return $htmlpath;
}

echo '<img src="',htmlpath('../../relative/path/to/file.ext'),'" border=1>'; 

?>

It will return something like:

<img src="/dir1/relative/path/to/file.ext" border=1>

php at keith tyler dot com

4 years ago


Note that under Windows, a slash-rooted path will resolve on the local drive, and *not* necessarily C:\.

For example:

M:\>php -r "print realpath('/AUTOEXEC.BAT');"
[prints nothing, because there is no M:\AUTOEXEC.BAT]

But:

M:\>C:
C:\>php -r "print realpath('/AUTOEXEC.BAT');"
C:\AUTOEXEC.BAT

Same script, different response depending on current drive.

I'm inclined to argue that this function *should* use the value of %SystemDrive% as the "slash root" base.

waldemar dot axdorph at gmail dot com

7 years ago


I made this function so that I could see if a user was trying to go above the current directory.

My top dir:
/var/www/dir/

User wanted
/var/www/

This comes in handy when you're making a php explorer/filemanager and you want your files in the directory above to be private.

Here it is

<?php
//usage
//$dir is the dir you are in
//$dir_top is the highest dir allowed.

//example
/*
if(above_dir('../', '/var/www/filemgr'))
    die('Not allowed. Please stick to your directories');
*/
function above_dir($dir, $dir_top){
    if($dir == $dir_top)
        return false;
    
    $dir = realpath($dir);
    $dir_top = realpath($dir_top);
    
    $dir = count(explode('/', $dir));
    $dir_top = count(explode('/', $dir_top));
    
    if($dir <= $dir_top){
        return true;
    }else{
        return false;
    }
}

?>

Leonard Challis

2 years ago


When using realpath (and similar functions) remember that PHP will take in to account open_basedir restrictions. So, if you do something like:

<?php
// test.php in httpdocs folder
$path = realpath(dirname(__FILE__) . '/../application');
?>

where your open_basedir setting is set to the httpdocs folder and tmp, this will return false. You must set it to the level above (or off) for this to work.

131 dot php at cloudyks dot org

8 years ago


<?php

//rp like, working with absolute/relative path & a little bit shorter :p 



function rp($path) {

    $out=array();

    foreach(explode('/', $path) as $i=>$fold){

        if ($fold=='' || $fold=='.') continue;

        if ($fold=='..' && $i>0 && end($out)!='..') array_pop($out);

    else $out[]= $fold;

    } return ($path{0}=='/'?'/':'').join('/', $out);

}

?>

julabz at laposte dot net

8 years ago


Here's a little function to return the relative path between two urls:

<?php

    function get_relative_path($start_dir, $final_dir){
        //
        $firstPathParts = explode(DIRECTORY_SEPARATOR, $start_dir);
        $secondPathParts = explode(DIRECTORY_SEPARATOR, $final_dir);
        //
        $sameCounter = 0;
        for($i = 0; $i < min( count($firstPathParts), count($secondPathParts) ); $i++) {
            if( strtolower($firstPathParts[$i]) !== strtolower($secondPathParts[$i]) ) {
                break;
            }
            $sameCounter++;
        }
        if( $sameCounter == 0 ) {
            return $final_dir;
        }
        //
        $newPath = '';
        for($i = $sameCounter; $i < count($firstPathParts); $i++) {
            if( $i > $sameCounter ) {
                $newPath .= DIRECTORY_SEPARATOR;
            }
            $newPath .= "..";
        }
        if( count($newPath) == 0 ) {
            $newPath = ".";
        }
        for($i = $sameCounter; $i < count($secondPathParts); $i++) {
            $newPath .= DIRECTORY_SEPARATOR;
            $newPath .= $secondPathParts[$i];
        }
        //
        return $newPath;
    }

?>

php.netatjulian-lemburg.de

10 years ago


You have a realpath.
Now you want a htmlpath.

First Suggestion:
<?php

function htmlpath($relative_path) {
   $realpath=realpath($relative_path);
   $htmlpath=str_replace($_SERVER['DOCUMENT_ROOT'],'',$realpath);
   return $htmlpath;
}
?>

But this does not work on some servers.

Second Suggestion:

<?php

function htmlpath($realpath) {
   $i = substr_count($_ENV["SCRIPT_URL"],'/')."<br>";
   $baserealpath=realpath(str_repeat('../',$i-1));
   $htmlpath=str_replace($baserealpath,'',$realpath);
   return $htmlpath;
}

?>

eion at robbmob dot com

4 months ago


Be aware that realpath() doesn't work with hidden Windows UNC paths, eg  \\servername\share$\folder\blah.txt but other PHP file-functions can access that file fine.

Vincent Par

1 year ago


Beware of relative symbolic links like this one (ext4 file system on Ubuntu) :

    vincent@vincent:~/Bureau/dirscan$ readlink sandbox/roulant/voiture/cabriolet/ln-loop-relative
    ../..

In this case, realpath may return false :

<?php
var_dump(realpath('sandbox/roulant/voiture/cabriolet/ln-loop-relative'));
// => string(44) "/home/vincent/Bureau/dirscan/sandbox/roulant"
var_dump(realpath('sandbox/roulant/voiture/cabriolet/ln-loop-relative/moto'));
// => bool(false)
?>

But you can fix it by clearing the realpath cache, this way :

<?php
var_dump(realpath('sandbox/roulant/voiture/cabriolet/ln-loop-relative'));
clearstatcache(true);
var_dump(realpath('sandbox/roulant/voiture/cabriolet/ln-loop-relative/moto'));
// => string(49) "/home/vincent/Bureau/dirscan/sandbox/roulant/moto"
?>

alex at bartl dot net

8 years ago


Sometimes it is helpful to check for the existance of a file

which might be found by using the include_path like in 



<?php

include("file_from_include_path.php");

?>



A simple function iterates the include_path and tries all

possibilites, returns translated_local_path on success or false

if not found.



<?php

function mappath($path_to_translate){

  $IncludePath=explode(PATH_SEPARATOR,get_include_path());

  foreach($IncludePath as $prefix){

    if(substr($prefix,-1)==DIRECTORY_SEPARATOR)

      $prefix=substr($prefix,0,-1);

    $try_path=sprintf("%s%s%s"

      ,$prefix,DIRECTORY_SEPARATOR,$path_to_translate);

    if(file_exists($try_path))return($try_path);

  }

  return false;

}

?>

dbags

4 years ago


If using Windows junction.exe to create a symlink, it seems impossible to get the real path to the file. Even __FILE__ contains the symlinked path, not the actual path of the file.

roman dot vasicek at email dot cz

6 years ago


You may want to change script behavior depending on the way how its code is invoked (included by another script / called directly). Following code do the job
<?php
if (realpath(__FILE__) == realpath($_SERVER['SCRIPT_FILENAME'])) {
  // called directly
  ...
} else {
  // included
  ...
}
?>

hrcerqueira at gmail dot com

6 years ago


if you just need to resolve a path that is not on your system, or you don't want to chdir to it, a simple regular expression can do the trick:

<?php

$p = '/cool/yeah/../zzz';

$p = preg_replace('/\w+\/\.\.\//', '', $p);

echo $p; //outputs /cool/zzz

?>

info[at]adico.co.il

7 years ago


for those who want to start realpath on windows platform and looking for example.



OR



for those who want to run zend framework on windows platform using the quick start guide 



<?php

define( "_CUR_OS", substr( php_uname( ), 0, 7 ) == "Windows" ? "Win" : "_Nix" );



function checkCurrentOS( $_OS )

{

    if ( strcmp( $_OS, _CUR_OS ) == 0 ) {

        return true;

    }

    return false;

}



// public/index.php

//

// Step 1: APPLICATION_PATH is a constant pointing to our

// application/subdirectory. We use this to add our "library" directory

// to the include_path, so that PHP can find our Zend Framework classes.



if ( checkCurrentOS( "Win" ) ) {

    $mappath = '/' . str_replace( "\\", "/", str_replace( "C:\\","", dirname(__FILE__) ) );

}

else {

    $mappath = dirname(__FILE__);

}



define('APPLICATION_PATH', realpath(  $mappath . '/../_privateadico/application/') );

set_include_path(

    APPLICATION_PATH . '/../library' 

    . PATH_SEPARATOR . get_include_path()

);

?>



I took the index.php for zend which is was written for unix and ported it to windows.



The porting problem was with realpath function not understanding dirname(__FILE__) syntex on windows

Isaac Z. Schlueter i at foohack dot com

7 years ago


If you need to resolve a url against a base url, as the browser does with anchor tags, then realpath won't help, because it's not on your file system.



This function does that:



<?php

function resolve_href ($base, $href) {

      

    // href="" ==> current url.

    if (!$href) {

        return $base;

    }



    // href="http://..." ==> href isn't relative

    $rel_parsed = parse_url($href);

    if (array_key_exists('scheme', $rel_parsed)) {

        return $href;

    }



    // add an extra character so that, if it ends in a /, we don't lose the last piece.

    $base_parsed = parse_url("$base ");

    // if it's just server.com and no path, then put a / there.

    if (!array_key_exists('path', $base_parsed)) {

        $base_parsed = parse_url("$base/ ");

    }



    // href="/ ==> throw away current path.

    if ($href{0} === "/") {

        $path = $href;

    } else {

        $path = dirname($base_parsed['path']) . "/$href";

    }



    // bla/./bloo ==> bla/bloo

    $path = preg_replace('~/\./~', '/', $path);



    // resolve /../

    // loop through all the parts, popping whenever there's a .., pushing otherwise.

        $parts = array();

        foreach (

            explode('/', preg_replace('~/+~', '/', $path)) as $part

        ) if ($part === "..") {

            array_pop($parts);

        } elseif ($part!="") {

            $parts[] = $part;

        }



    return (

        (array_key_exists('scheme', $base_parsed)) ?

            $base_parsed['scheme'] . '://' . $base_parsed['host'] : ""

    ) . "/" . implode("/", $parts);



}

?>



[EDIT BY danbrown AT php DOT net:  Code contains a bugfix supplied by (Zhenya DOT Morozov AT gmail DOT com) on 23-JAN-09, to address the following issue:

'If your path contains "0" (or any "false" string) directory name, the function removes that directory from the path.']

Santosh Patnaik

8 years ago


Given real paths of two files, this function finds the relative path of one ($dest) with respect to the other ($root).



<?php

echo rel_path('a/b/c', 'd/e'); // './../../a/b/c'

echo rel_path('a/b/c', 'a/b/c/d/e'); // './../..'

echo rel_path('a/b/c/d/e', 'a/b/c'); // './d/e'



function rel_path($dest, $root = '', $dir_sep = '/')

{

 $root = explode($dir_sep, $root);

 $dest = explode($dir_sep, $dest);

 $path = '.';

 $fix = '';

 $diff = 0;

 for($i = -1; ++$i < max(($rC = count($root)), ($dC = count($dest)));)

 {

  if(isset($root[$i]) and isset($dest[$i])) 

  {

   if($diff)

   {

    $path .= $dir_sep. '..';

    $fix .= $dir_sep. $dest[$i];

    continue;

   }

   if($root[$i] != $dest[$i])

   {

    $diff = 1;

    $path .= $dir_sep. '..';

    $fix .= $dir_sep. $dest[$i];

    continue;

   }

  }

  elseif(!isset($root[$i]) and isset($dest[$i]))

  {

   for($j = $i-1; ++$j < $dC;)

   {

    $fix .= $dir_sep. $dest[$j];

   }

   break;

  }

  elseif(isset($root[$i]) and !isset($dest[$i]))

  {

   for($j = $i-1; ++$j < $rC;)

   {

    $fix = $dir_sep. '..'. $fix;

   }

   break;

  } 

 }

  return $path. $fix;

}

?>

berglov1 at hotmail dot com

8 years ago


There might be other solutions like mine in here, 
but here is one more.

This function converts Virtual Paths into Relative Paths. 
I needed that at one time, and I did'nt have much luck finding a solution amongst the PHP Functions in the manual.

<?php
function GetPath($RedPath) {

  if(substr($RedPath, 0, 1) == "/") {
    $SysPath = dirname($_SERVER['PHP_SELF']); 

    if(substr($RedPath, -1) == "/") $RedPath = substr($RedPath, 0, -1);

    if(strlen($SysPath) == 1)
      return ".".$RedPath;
    elseif(strcmp($SysPath,$RedPath) == 0)
      return "./";  

    else {
      $s_tmp = split("/", $SysPath);
      $r_tmp = split("/", $RedPath);

      while(($r_tmp[$i] == $s_tmp[$i]) && $i < 10)
        $i++;

      $t_RedPath = end(split("/", $RedPath, ($i+1)));  

      if($i == count($s_tmp))
        return "./".$t_RedPath;
      else
        return str_repeat("../", count($s_tmp)-$i).$t_RedPath;
    }
  }
  else
    return $RedPath;

}
?>

richpageau at yahoo dot co dot uk

8 years ago


This is my attempt at writing a realpath replacement. I needed to to run some Adobe code on a server with realpath disabled and this seemed to do the job. It is written for a unix server, I suppose it could be made cross platform using DIRECTORY_SEPARATOR. (With thanks to Marc Noirot for his code).



<?php

function myRealPath($path) {



    // check if path begins with "/" ie. is absolute

    // if it isnt concat with script path

    if (strpos($path,"/") !== 0) {

        $base=dirname($_SERVER['SCRIPT_FILENAME']);

        $path=$base."/".$path;

    }

  

    // canonicalize

    $path=explode('/', $path);

    $newpath=array();

    for ($i=0; $i<sizeof($path); $i++) {

        if ($path[$i]==='' || $path[$i]==='.') continue;

           if ($path[$i]==='..') {

              array_pop($newpath);

              continue;

        }

        array_push($newpath, $path[$i]);

    }

    $finalpath="/".implode('/', $newpath);



    // check then return valid path or filename

    if (file_exists($finalpath)) {

        return ($finalpath);

    }

    else return FALSE;

}

?>

Lars Scheithauer <l dot scheithauer at gmx dot de>

10 years ago


This function is also nice to test for security-breaches. You can forbid the script to access files below a certain directory to prevent "../../../etc/shadow" and similar attacks:

<?php

// declare the basic directory for security reasons
// Please do NOT attach a "/"-suffix !
$basedir = '/var/www/cgi-bin/scriptfolder';

// compare the entered path with the basedir
$path_parts = pathinfo($_REQUEST['file_to_get']);
if (realpath($path_parts['dirname']) != $basedir) {
    /* appropriate action against crack-attempt*/
    die ('coding good - h4x1ng bad!');
}

?>

The url "script.php?file_to_get=../../../etc/shadow" will now result in an error.

jemptyg at rwmc dot net

14 years ago


realpath() seems to be equivalent to ASP's Server.MapPath.  On my Win2k box I have successfully used realpath() to give me the full path for a file outside of the document_root.  This will be very useful in conjunction with is_dir and/or is_file, which require a full path.

jerome at dot451 dot com

15 years ago


mkdir (and realpath) did not work because i'd used virtual() function to replace server side include in my file.

And i've just seen that virtual() function changes the current directory ... that's why !



jerome ;)

ilya-direct at ya dot ru

1 year ago


It's strange, but  realpath('C:/wamp/www/sdo-test/data') sometime retuns false, use // or \ instead.

netmosfera at gmail dot com

5 years ago


please note that realpath is a performance killer

on my sys listing 100 files with realpath takes 0.2 sec (core2quad 6600 x64 4gbddr2)

in most cases, its better to use getcwd() instead and work with dirname() to resolve ".."

jpic

5 years ago


There is no native function that does the opposite.

Pure-php implementation:

<?php
function getRelativePath( $path, $compareTo ) {
        // clean arguments by removing trailing and prefixing slashes
        if ( substr( $path, -1 ) == '/' ) {
            $path = substr( $path, 0, -1 );
        }
        if ( substr( $path, 0, 1 ) == '/' ) {
            $path = substr( $path, 1 );
        }

        if ( substr( $compareTo, -1 ) == '/' ) {
            $compareTo = substr( $compareTo, 0, -1 );
        }
        if ( substr( $compareTo, 0, 1 ) == '/' ) {
            $compareTo = substr( $compareTo, 1 );
        }

        // simple case: $compareTo is in $path
        if ( strpos( $path, $compareTo ) === 0 ) {
            $offset = strlen( $compareTo ) + 1;
            return substr( $path, $offset );
        }

        $relative  = array(  );
        $pathParts = explode( '/', $path );
        $compareToParts = explode( '/', $compareTo );

        foreach( $compareToParts as $index => $part ) {
            if ( isset( $pathParts[$index] ) && $pathParts[$index] == $part ) {
                continue;
            }

            $relative[] = '..';
        }

        foreach( $pathParts as $index => $part ) {
            if ( isset( $compareToParts[$index] ) && $compareToParts[$index] == $part ) {
                continue;
            }

            $relative[] = $part;
        }

        return implode( '/', $relative );
    }
?>

Some tests forr phpunit:

<?php
    static public function getRelativePathProvider(  )  {
        return array( 
            array( 
                '/srv/foo/bar',
                '/srv',
                'foo/bar',
            ),
            array( 
                '/srv/foo/bar',
                '/srv/',
                'foo/bar',
            ),
            array( 
                '/srv/foo/bar/',
                '/srv',
                'foo/bar',
            ),
            array( 
                '/srv/foo/bar/',
                '/srv/',
                'foo/bar',
            ),
            array( 
                '/srv/foo/bar',
                '/srv/test',
                '../foo/bar',
            ),
            array( 
                '/srv/foo/bar',
                '/srv/test/fool',
                '../../foo/bar',
            ),
            array( 
                '/srv/mad/xp/mad/model/static/css/uni-form.css',
                '/srv/mad/xp/liria/',
                '../mad/model/static/css/uni-form.css',
            ),
        );
    }

    /**
     * @dataProvider getRelativePathProvider
     */
    public function testGetRelativePath( $path, $compareTo, $expected ) {
        $result = getRelativePath( $path, $compareTo );
        $this->assertEquals( $expected, $result );
    }
?>

orssey

7 years ago


<?php

Class RealPath
{
    private $ServerPath;
    private $ScriptPath;
    private $AddSlashEnd;

    function __construct()
    {
        $this->AddSlashEnd = "";
        
        $this->ServerPath = $_SERVER['DOCUMENT_ROOT'];
        $this->ScriptPath = substr(dirname($_SERVER['SCRIPT_FILENAME']), strlen($this->ServerPath));
    }
    
    private function Server($adress)
    {
        $ThisPath = @realpath($adress);
        $ThisPathLength = strlen($ThisPath);
    
        return substr($ThisPath, strlen($this->ServerPath), $ThisPathLength);
    }
    
    public function Absolute($adress)
    {
        return $_SERVER['SERVER_NAME'] . $this->Server($adress) . $this->AddSlashEnd;
    }
    
    public function RelativeServer($adress)
    {
        return $this->Server($adress) . $this->AddSlashEnd;
    }

    public function RelativeScript($adress)
    {
        $ScriptExplode = explode("/", $this->ScriptPath);
        $ServerExplode = explode("/", $this->Server($adress));
        
        $TmpCount = $ScriptCount = count($ScriptExplode);
        $ServerCount = count($ServerExplode);
        
        $ReturnPath = "";
        
        for($i = 1; $i < $TmpCount; $i++)
        {
            if($ScriptExplode[$i] == $ServerExplode[$i])
                --$ScriptCount;
            else
                break;
        }
        
        for($i = 1; $i < $ScriptCount; $i++)
            $ReturnPath .= "/..";

        for($i = $TmpCount - $ScriptCount + 1; $i < $ServerCount; $i++)
            $ReturnPath .= "/" . $ServerExplode[$i];
        
        return $ReturnPath . $this->AddSlashEnd;
    }

    public function AddSlash($value)
    {
        if(is_bool($value))
        {
            $this->AddSlashEnd = ($value)? "/" : "";
            return true;
        }
        else
            return false;
    }
    
}

example:

$ObjectPath = new RealPath;
$ObjectPath->RelativeScript("../a/b../c/d/f../g../h");

alban dot lopez+php dot net at gmail dot com

8 years ago


Here's a little function to return the shortest relative path between dest folder and current folder (you can be replace $_SERVER['PHP_SEFL'] by your variable folder) :

<?php
// if you run in /var/www/

echo UnRealPath ('./'); // return "./"
echo UnRealPath ('./ajax-browser/AJAX-B/scripts/'); // return "./ajax-browser/AJAX-B/scripts/"
echo UnRealPath ('/var/'); // return "./../"
echo UnRealPath ('/opt/picasa/wine/'); // return "./../../opt/picasa/wine/"

function UnRealPath ($dest)
{
    $Ahere = explode ('/', realpath($_SERVER['PHP_SEFL']));
    $Adest = explode ('/', realpath($dest));
    $result = '.'; // le chemin retouné dois forcement commancé par ./   c'est le but
    while (implode ('/', $Adest) != implode ('/', $Ahere))// && count ($Adest)>0 && count($Ahere)>0 )
    {
        if (count($Ahere)>count($Adest))
        {
            array_pop($Ahere);
            $result .= '/..';
        }
        else
        {
            array_pop($Adest);
        }
    }
    return str_replace('//', '/', $result.str_replace(implode ('/', $Adest), '', realpath($dest)).(@is_dir(realpath($dest))?'/':''));
}
?>

realpath

Description

Parameters

Return Values

Changelog

Examples

See Also

User Contributed Notes