Last updated: Fri, 24 Jul 2009

pathinfo

(PHP 4 >= 4.0.3, PHP 5)

pathinfo — Returns information about a file path

설명

mixed pathinfo ( string $path [, int $options= PATHINFO_DIRNAME | PATHINFO_BASENAME | PATHINFO_EXTENSION | PATHINFO_FILENAME ] )

pathinfo() returns an associative array containing information about path .

인수

path: The path being checked.
options: You can specify which elements are returned with optional parameter options . It composes from PATHINFO_DIRNAME, PATHINFO_BASENAME, PATHINFO_EXTENSION and PATHINFO_FILENAME. It defaults to return all elements.

반환값

The following associative array elements are returned: dirname, basename, extension (if any), and filename.

If options is used, this function will return a string if not all elements are requested.

변경점

버전	설명
5.2.0	The `PATHINFO_FILENAME` constant was added.

예제

Example #1 pathinfo() Example


<?php
$path_parts = pathinfo('/www/htdocs/index.html');

echo $path_parts['dirname'], "\n";
echo $path_parts['basename'], "\n";
echo $path_parts['extension'], "\n";
echo $path_parts['filename'], "\n"; // since PHP 5.2.0
?>

위 예제의 출력:

/www/htdocs
index.html
html
index

주의

Note: For information on retrieving the current path info, read the section on predefined reserved variables.

참고

dirname() - Returns directory name component of path
basename() - Returns filename component of path
parse_url() - URL을 해석해서 구성요소를 반환
realpath() - Returns canonicalized absolute pathname

pclose

parse_ini_string

Last updated: Fri, 24 Jul 2009

add a note User Contributed Notes
pathinfo

kc8yds at gmail dot com
18-Sep-2009 06:43


any type of url parse_url can handle this will get the extension of



pathinfo(parse_url('URL GOES HERE',PHP_URL_PATH),PATHINFO_EXTENSION)

jjoss at mail dot ru
05-Feb-2009 03:15


pathinfo() which can be used with UTF filenames.





<?php


  function pathinfo_utf($path)


  {


    if (strpos($path, '/') !== false) $basename = end(explode('/', $path));


    elseif (strpos($path, '\\') !== false) $basename = end(explode('\\', $path));


    else return false;


    if (empty($basename)) return false;





    $dirname = substr($path, 0, strlen($path) - strlen($basename) - 1);





    if (strpos($basename, '.') !== false)


    {


      $extension = end(explode('.', $path));


      $filename = substr($basename, 0, strlen($basename) - strlen($extension) - 1);


    }


    else


    {


      $extension = '';


      $filename = $basename;


    }





    return array


    (


      'dirname' => $dirname,


      'basename' => $basename,


      'extension' => $extension,


      'filename' => $filename


    );


  }


?>

aalaap at gmail dot com
03-Feb-2009 12:58


Here is a simple function that gets the extension of a file. Simply using PATHINFO_EXTENSION will yield incorrect results if the path contains a query string with dots in the parameter names (for eg. &x.1=2&y.1=5), so this function eliminates the query string first and subsequently runs PATHINFO_EXTENSION on the clean path/url.





<?php


function extension($path) {


  $qpos = strpos($path, "?");





  if ($qpos!==false) $path = substr($path, 0, $qpos);


  


  $extension = pathinfo($path, PATHINFO_EXTENSION);





  return $extension;


}


?>

php [spat] hm2k.org
13-Jan-2009 09:27


A little compat for < 5.2



<?php



function pathinfo_filename($file) { //file.name.ext, returns file.name

    if (defined('PATHINFO_FILENAME')) return pathinfo($file,PATHINFO_FILENAME);

    if (strstr($file, '.')) return substr($file,0,strrpos($file,'.'));

}



?>

php-manual at spunts dot net
25-Dec-2008 02:19


For a good example of how platform independent this function is have a look at the different return values that Lostindream and I experienced. Mine is above and Lostindream's is below:



Array

(

    [dirname] => /www/psychicblast/images/1

    [basename] => my three girlfriends.jpg

    [extension] => jpg

)



Array

(

    [dirname] => /www/htdocs

    [basename] => index.html

    [extension] => html

    [filename] => index

)

z

benjaminhill at gmail dot com
03-Dec-2008 02:18


A warning: this function varies depending on the platform it is being run on.  For example, pathinfo('C:\Program Files\Adobe\Reader 9.0\Reader\AcroRd32.exe') will return a different result when run through a winOS PHP platform (local development) vs. a server's UNIX-based OS.  A bit like the Locale settings, but unexpected.

Lostindream at atlas dot cz
20-Aug-2008 05:43


at example from "qutechie at gmail dot com" you can only replace function 'strpos' with 'strrpos'. (strrpos — Find position of last occurrence of a char in a string)



It's simple. For example:

<?php



function filePath($filePath)

{

 $fileParts = pathinfo($filePath);



 if(!isset($fileParts['filename']))

 {$fileParts['filename'] = substr($fileParts['basename'], 0, strrpos($fileParts['basename'], '.'));}

  

 return $fileParts;

}

 

$filePath = filePath('/www/htdocs/index.html');

print_r($filePath);

?>



Output will be:

Array

(

    [dirname] => /www/htdocs

    [basename] => index.html

    [extension] => html

    [filename] => index

)

leons87_AT_hotmail_DOT_com
15-Aug-2008 08:47


qutechie at gmail dot com wrote a fix for support for filename in PHP 4; however it gets it wrong whenever you have a filename with a . in it (so foo.bar.jpg would return foo instead of foo.bar).



A fix would be:

<?php

if(!isset($path_parts['filename'])){

    $reversed_filename = strrev( $path_parts['basename'] );

    $path_parts['filename'] = strrev( substr( $reversed_filename, strpos( $reversed_filename, '.' ) + 1 ) );

}

?>



The idea is that you reverse the string and create a substring that starts after the first '.' and then reverse the result.

qutechie at gmail dot com
22-Jul-2008 10:29


Quick fix for lack of support for 'filename' in php4



<?php

$path_parts = pathinfo('/www/htdocs/index.html');



echo $path_parts['dirname'], "\n";

echo $path_parts['basename'], "\n";

echo $path_parts['extension'], "\n";

echo $path_parts['filename'], "\n"; // since PHP 5.2.0



// if php4

              if(!isset($path_parts['filename'])){

                $path_parts['filename'] = substr($path_parts['basename'], 0,strpos($path_parts['basename'],'.'));

              }



?>

christian dot reinecke at web dot de
25-Feb-2008 12:46


if you call pathinfo with a filename in url-style (example.php?with=parameter), make sure you remove the given parameters before, otherwise they will be returned as part of the extension.



extension => php?with=parameter

tom at foo-bar dot co dot uk
30-Jan-2008 11:48


Note that this function seems to just perform string operations, and will work even on a non-existent path, e.g.



<?php

print_r(pathinfo('/no/where/file.txt'));

?>



which will output:

Array

(

    [dirname] => /no/where

    [basename] => file.txt

    [extension] => txt

    [filename] => file

)

OakBehringer
28-Jan-2008 10:47


Building on David Blinco's function, the following will:



1. Return the correct protocol for secure requests (https)

2. Throw an exception for invalid files

3. Ensure the returned url separates directories with forward slashes (David's will not on Windows systems).



function mapPath ($filepath) {

    $realpath = realpath($filepath);

    $dir;

    

    // Verify that the path passed is real and harvest the bottom directory

    if (is_file($realpath)) {

        $dir = dirname($realpath);

    }

    elseif (is_dir($realpath)) {

        $dir = $realpath; 

    }

    else {

        throw new Exception('File does not exist: ' . $realpath);

    }



    // Make sure the path is not lower than the server root

    if (strlen($dir) < strlen($_SERVER['DOCUMENT_ROOT']))

        throw new Exception("Cannot create http path below server http root.");

        

    $path = ((isset($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) != 'off') ? 'https' : 'http') . '://' . $_SERVER['HTTP_HOST'] . substr($realpath, strlen($_SERVER['DOCUMENT_ROOT']));

    

    if (DIRECTORY_SEPARATOR == '\\')

        $path = str_replace('\\', '/', $path);



    return $path;

}

davidblinco at gmail dot com
27-Jan-2008 12:27


This function is not perfect, but you can use it to convert a relative path to a URL.

Please email me if you can make any improvements.



<?php

function mapURL($relPath) {

    $filePathName = realpath($relPath);

    $filePath = realpath(dirname($relPath));

    $basePath = realpath($_SERVER['DOCUMENT_ROOT']);

    

    // can not create URL for directory lower than DOCUMENT_ROOT

    if (strlen($basePath) > strlen($filePath)) {

        return '';

    }

    

    return 'http://' . $_SERVER['HTTP_HOST'] . substr($filePathName, strlen($basePath));

}

?>

henrik at not-an-address dot com
22-Dec-2007 03:23


If you have filename with utf-8 characters, pathinfo will strip them away:



print_r(pathinfo("/mnt/files/飛兒樂團光茫.mp3"));



 .. will display:



Array

(

    [dirname] => /mnt/files

    [basename] => .mp3

    [extension] => mp3

    [filename] => 

)

mrnemesis at ntlworld dot com
20-Dec-2007 12:22


Note that in PHP 4 (if you're stuck using it), pathinfo only provides dirname, basename, and extension, but not filename. This function will not split a file's stem and extension for you.

anders.jenbo()pc.dk
12-Sep-2007 06:34


Heres a funciton to get the same results from php 4+ but you will have to call pathinfo_filename() instead of pathinfo().



<?php

if(version_compare(phpversion(), "5.2.0", "<")) {

    function pathinfo_filename($path) {

        $temp = pathinfo($path);

        if($temp['extension'])

            $temp['filename'] = substr($temp['basename'],0 ,strlen($temp['basename'])-strlen($temp['extension'])-1);

        return $temp;

    }

} else {

    function pathinfo_filename($path) {

        return pathinfo($path);

    }

}

?>

avi-team at inbox dot lv
16-Jul-2007 12:14


You shouldn't assign values as it is described in previous post

// wrong:

list( $dirname, $basename, $extension, $filename ) = array_values( pathinfo($file) );



if $file has no extension, you get wrong variable values: $extension would be assigned with 'filename' array element of pathinfo() result, but $filename - would be empty.

phpnet at whoisgregg dot com
31-May-2007 03:01


If you want to easily assign the values returned by pathinfo to separate variable names, list isn't enough. You can use array_values() first to convert the associative array into the indexed array that list() expects:



// throws notices, variables aren't set

list( $dirname, $basename, $extension, $filename ) = pathinfo($file);



// works

list( $dirname, $basename, $extension, $filename ) = array_values( pathinfo($file) );

cochise_chiracahua at hotmail.com
26-Nov-2005 04:55


Sometimes, it's interessant to get the basename without extension.

So, I appended a new entry 'basenameWE' (Basename Without Extension) to the returned array.



<?php



// pathinfo improved

function pathinfo_im($path) {

    

    $tab = pathinfo($path);

    

    $tab["basenameWE"] = substr($tab["basename"],0

    ,strlen($tab["basename"]) - (strlen($tab["extension"]) + 1) );

    

    return $tab;

}



$my_path = "/var/www/html/example.html";



echo "<pre>\n";

print_r( pathinfo_im($my_path) );

echo "</pre>\n";



?>



Out :



Array

(

    [dirname] => /var/www/html

    [basename] => example.html

    [extension] => html

    [basenameWE] => example

)

sgermain at icexnetworks dot com
09-Jul-2005 03:24


It is true that if you put a directory into pathinfo, usually the extension is empty. But, if the directory name is /www/example.com/ for example, you will have the following output:



Array

(

    [dirname] => /www

    [basename] => example.com

    [extension] => com

)



So, it is the same as a file.

n0dalus
08-Feb-2005 06:47


If a file has more than one 'file extension' (seperated by periods), the last one will be returned.

For example:

<?php

$pathinfo = pathinfo('/dir/test.tar.gz');

echo 'Extension: '.$pathinfo['extension'];

?>

will produce:

Extension: gz



and not tar.gz

03-Dec-2004 09:39


If you want only the file extension, use this:

<?php

$extension = substr(strrchr($filename, "."), 1);

?>

This is many times faster than using pathinfo() and getting the value from array.

rob at webdimension dot co dot uk
04-Oct-2004 10:48


Further to my previous post.



This affects servers that run PHP as a cgi module



If you have your own server:

You can use the AcceptPathInfo directive to force the core handler to accept requests with PATH_INFO and thereby restore the ability to use PATH_INFO in server-side includes.



Further information:

http://httpd.apache.org/docs-2.0/mod/core.html#acceptpathinfo

junk at plaino dot com
19-Aug-2004 10:41


Convert a URL to the local file path and vice versa, convert a local file path to a URL.



// this sets the sytem / or \ :

strstr( PHP_OS, "WIN") ? $slash = "\\" : $slash = "/";



// This is the location of the php file that contains this

// function. Usually this request is made to files/folders 

// down the directory structure, so the php file that 

// contains these functions is a good "where am i" 

// reference point:

$WIMPY_BASE['path']['physical'] = getcwd();

$WIMPY_BASE['path']['www'] = "http://".$_SERVER['HTTP_HOST'];



function url2filepath($theURL){

    global $WIMPY_BASE, $slash;

    $AtheFile = explode ("/", $theURL);

    $theFileName = array_pop($AtheFile);

    $AwimpyPathWWW = explode ("/", $WIMPY_BASE['path']['www']);

    $AtheFilePath = array_values (array_diff ($AtheFile, $AwimpyPathWWW));

    if($AtheFilePath){

        $theFilePath = $slash.implode($slash, $AtheFilePath).$slash.$theFileName;

    } else {

        $theFilePath = implode($slash, $AtheFilePath).$slash.$theFileName;

    }

    return ($WIMPY_BASE['path']['physical'].$theFilePath);

}



function filepath2url ($theFilepath){

    global $WIMPY_BASE, $slash;

    $AtheFile = explode ($slash, $theFilepath);

    $theFileName = array_pop($AtheFile);

    $AwimpyPathFILE = explode ($slash, $WIMPY_BASE['path']['physical']);

    $AtheFilePath = array_values (array_diff ($AtheFile, $AwimpyPathFILE));

    $thFileURL = implode("/", $AtheFilePath)."/".$theFileName;

    return ($WIMPY_BASE['path']['www']."$thFileURL");

}

albertof at deltasoft dot com dot ar
29-May-2002 05:10


This code is to work in index.php/var/var



if(isset($PATH_INFO)) {

      $viewcode = explode('/', $PATH_INFO);

        $num = count($viewcode);

        if($num % 2 == 0) {

            $viewcode[] = '';

            $num++;

        }

        for($i = 1; $i < $num; $i += 2) {



            $$viewcode[$i] = $viewcode[$i+1];



          }

    }

m-symons at home dot com
25-Aug-2001 11:01


And, of course, to account for the problem noted in the first post whereby calling a directory, not a file, messes with the output of pathinfo(), you can include the following test:





if($pathinfo[extension] == "") {





$deep++;





}





Ooops...sorry for missing that.

m-symons at home dot com
25-Aug-2001 10:54


Here's a neat wee function to grab the relative path to root (especially useful if you're using mock-directories to pass variables into scripts with mod_rewrite).  The function simply iterates through every occurence of "/" within the REQUEST_URI environment variable, appending "../" to the output for every instance:





<?php





function path_to_root($path) {





    $pathinfo = pathinfo($path);


    


    $deep = substr_count($pathinfo[dirname], "/");


    


    $path_to_root = "./";


    


    for($i = 1; $i <= $deep; $i++) {


    


        $path_to_root .= "../";


        


    }


    


    return $path_to_root;


}





path_to_root($REQUEST_URI);





?>

mikep at oeone dot com
23-Aug-2001 02:27


If you run this on a directory, basename is the last directory in the path, dirname is the path before the final directory and extension is empty.

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Last updated: Fri, 24 Jul 2009