PHP 5.4.33 Released

realpath

(PHP 4, PHP 5)

realpathReturns canonicalized absolute pathname

Descrierea

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.

Parametri

path

The path being checked.

Notă:

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

Valorile întoarse

Returns the canonicalized absolute pathname on success. The resulting path will have no symbolic link, '/./' or '/../' components.

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

Notă:

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

Notă: Deoarece tipul întreg al PHP este cu semn și multe platforme utilizează întregi de 32 de biți, unele funcții ale sistemului de fișiere pot întoarce rezultate neașteptate pentru fișiere ce depășesc 2GB.

Istoria schimbărilor

Versiunea Descriere
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.

Exemple

Example #1 realpath() example

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

Exemplul de mai sus va afișa:

/etc/passwd

Example #2 realpath() on Windows

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

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

Exemplul de mai sus va afișa:

C:\WINDOWS\System32

Vedeți de asemenea

  • basename() - Returns trailing name component of path
  • dirname() - Returns parent directory's path
  • pathinfo() - Returns information about a file path

add a note add a note

User Contributed Notes 31 notes

up
12
Anonymous
2 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).
up
10
runeimp at gmail dot com
1 year 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
up
4
imagiro
2 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);
}
?>
up
4
eric at themepark dot com
12 years ago
note that realpath() will chop any trailing delimiter like \ or / ...don't forget to add it back on if you need it.

Eric Mueller - themepark.com
up
7
Sven Arduwie
6 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. :)
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4
Leonard Challis
1 year 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.
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3
131 dot php at cloudyks dot org
6 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);
}
?>
up
3
David Beck
7 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

?>
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2
dbags
2 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.
up
2
php at keith tyler dot com
2 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.
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1
hrcerqueira at gmail dot com
4 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

?>
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2
waldemar dot axdorph at gmail dot com
6 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;
    }
}

?>
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1
richpageau at yahoo dot co dot uk
7 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;
}
?>
up
1
jerome at dot451 dot com
14 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 ;)
up
0
ilya-direct at ya dot ru
23 days ago
It's strange, but  realpath('C:/wamp/www/sdo-test/data') sometime retuns false, use // or \ instead.
up
0
Jrg Wagner
4 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\\"
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0
roman dot vasicek at email dot cz
4 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
 
...
}
?>
up
0
orssey
5 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");
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0
info[at]adico.co.il
5 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
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0
Isaac Z. Schlueter i at foohack dot com
6 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.']
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0
alex at bartl dot net
6 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;
}
?>
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0
Santosh Patnaik
7 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;
}
?>
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0
berglov1 at hotmail dot com
7 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;

}
?>
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0
julabz at laposte dot net
7 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;
    }

?>
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0
php.netatjulian-lemburg.de
9 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;
}

?>
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0
Lars Scheithauer <l dot scheithauer at gmx dot de>
9 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.
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0
pulstar at ig dot com dot br
9 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>
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-1
netmosfera at gmail dot com
3 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 ".."
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-1
jpic
4 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 );
    }
?>
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-1
jemptyg at rwmc dot net
13 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.
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-1
alban dot lopez+php dot net at gmail dot com
6 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))?'/':''));
}
?>
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