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Last updated: Fri, 09 May 2008

pathinfo

(PHP 4 >= 4.0.3, PHP 5)

pathinfo — Returns information about a file path

Description

mixed pathinfo ( string $path [, int $options ] )

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

Parameters

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.

Return Values

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.

ChangeLog

Version	Description
5.2.0	The `PATHINFO_FILENAME` constant was added.

Examples

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
?>

The above example will output:

/www/htdocs
index.html
html
index

Notes

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


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
27-Jan-2008 05:47


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
26-Jan-2008 07:27


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
21-Dec-2007 10:23


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
19-Dec-2007 07:22


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
11-Sep-2007 02:34


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
15-Jul-2007 08:14


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
30-May-2007 11:01


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
25-Nov-2005 11:55


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
08-Jul-2005 11:24


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 01:47


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 04:39


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 06:48


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 06:41


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 01:10


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
24-Aug-2001 07:01


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
24-Aug-2001 06:54


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
22-Aug-2001 10:27


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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