PHP 7.1.24 Released

pathinfo

(PHP 4 >= 4.0.3, PHP 5, PHP 7)

pathinfoLiefert Informationen über einen Dateipfad

Beschreibung

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

pathinfo() gibt Informationen über einen Dateipfad (path) zurück: entweder als assoziatives Array oder als String, abhängig vom options-Parameter.

Hinweis:

Informationen über das Wiederauffinden der aktuellen Pfadinformation finden Sie unter Vordefinierte Variablen.

Achtung

pathinfo() berücksichtigt die locale-Einstellung. Um einen Pfad, der Multibyte-Zeichen enthält, korrekt parsen zu können, muss die entsprechende locale mit der setlocale()-Funktion gesetzt werden.

Parameter-Liste

path

Der zu analysierende Dateipfad.

options

Falls angegeben, wird nur dieses eine Element zurückgegeben. Mögliche Werte: PATHINFO_DIRNAME, PATHINFO_BASENAME, PATHINFO_EXTENSION oder PATHINFO_FILENAME.

Falls options nicht angegeben wird, werden alle verfügbaren Elemente zurückgegeben.

Rückgabewerte

Falls der options-Parameter nicht angegeben wird, wird ein assoziatives Array mit den folgenden Elementen zurückgegeben: dirname, basename, extension (falls vorhanden) und filename.

Hinweis:

Wenn der path mehr als eine Erweiterung hat, gibt PATHINFO_EXTENSION nur die letzte zurück, und PATHINFO_FILENAME entfernt nur die letzte. (Siehe auch das erste Beispiel weiter unten.)

Hinweis:

Falls path keine Erweiterung hat, wird das extension-Element nicht zurückgegeben (siehe das zweite Beispiel unten).

Hinweis:

Beginnt der basename des path mit einem Punkt, werden die folgenden Zeichen als extension interpretiert, und der filename ist leer (siehe das dritte Beispiel unten).

Falls options genutzt wird, gibt diese Funktion einen String mit dem gewünschten Element zurück.

Changelog

Version Beschreibung
5.2.0 Die PATHINFO_FILENAME-Konstante wurde hinzugefügt.

Beispiele

Beispiel #1 pathinfo()-Beispiel

<?php
$path_parts 
pathinfo('/www/htdocs/inc/lib.inc.php');

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

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

/www/htdocs/inc
lib.inc.php
php
lib.inc

Beispiel #2 pathinfo()-Beispiel für den Unterschied zwischen einer leeren und keiner Erweiterung

<?php
$path_parts 
pathinfo('/path/emptyextension.');
var_dump($path_parts['extension']);

$path_parts pathinfo('/path/noextension');
var_dump($path_parts['extension']);
?>

Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

string(0) ""

Notice: Undefined index: extension in /test.php on line 6
NULL

Beispiel #3 pathinfo()-Beispiel für eine Punktdatei

<?php
print_r
(pathinfo('/some/path/.test'));
?>

Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

Array
(
    [dirname] => /some/path
    [basename] => .test
    [extension] => test
    [filename] => 
)

Siehe auch

  • dirname() - Gibt den Pfad des übergeordneten Verzeichnisses zurück
  • basename() - Gibt letzten Namensteil einer Pfadangabe zurück
  • parse_url() - Analysiert eine URL und gibt ihre Bestandteile zurück
  • realpath() - Löst einen Pfad in einen absoluten und eindeutigen auf

add a note add a note

User Contributed Notes 34 notes

up
18
498936940 at qq dot com
2 years ago
Note:

pathinfo() is locale aware, so for it to parse a path containing multibyte characters correctly, the matching locale must be set using the setlocale() function.

Reality:
var_dump(pathinfo('中国人2016.xls'));
exit();
array(4) { 'dirname' => string(1) "." 'basename' => string(8) "2016.xls" 'extension' => string(3) "xls" 'filename' => string(4) "2016" }

Expect(Solve):
setlocale(LC_ALL, 'zh_CN.UTF-8');
var_dump(pathinfo('中国人2016.xls'));
exit();
array(4) { 'dirname' => string(1) "." 'basename' => string(17) "中国人2016.xls" 'extension' => string(3) "xls" 'filename' => string(13) "中国人2016" }
up
20
avi-team at inbox dot lv
11 years ago
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.
up
6
Lori
1 month ago
Simple example of pathinfo and array destructuring in PHP 7:
<?php
[ 'basename' => $basename, 'dirname' => $dirname ] = pathinfo('/www/htdocs/inc/lib.inc.php');

var_dump($basename, $dirname);

// result:
// string(11) "lib.inc.php"
// string(15) "/www/htdocs/inc"
?>
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10
n0dalus
13 years ago
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
up
8
Pietro Baricco
6 years ago
Use this function in place of pathinfo to make it work with UTF-8 encoded file names too

<?php
function mb_pathinfo($filepath) {
   
preg_match('%^(.*?)[\\\\/]*(([^/\\\\]*?)(\.([^\.\\\\/]+?)|))[\\\\/\.]*$%im',$filepath,$m);
    if(
$m[1]) $ret['dirname']=$m[1];
    if(
$m[2]) $ret['basename']=$m[2];
    if(
$m[5]) $ret['extension']=$m[5];
    if(
$m[3]) $ret['filename']=$m[3];
    return
$ret;
}
?>
up
5
krkbpk at gmail dot com RamaKrishna Kothamasu
5 years ago
//pathinfo function example
<?php
//passing single argument
echo "<pre>";
print_r(pathinfo("/home/ramki/ramki.pdf"));
echo
"</pre>";
//passing two agruments
$path=array(PATHINFO_DIRNAME,PATHINFO_BASENAME,PATHINFO_EXTENSION,PATHINFO_FILENAME);
foreach (
$path as $value)
echo
"<pre>".pathinfo("/home/ramki/ramki.pdf",$value)."</pre>";
?>
//output
/*
Array
(
    [dirname] => /home/ramki
    [basename] => ramki.pdf
    [extension] => pdf
    [filename] => ramki
)
/home/ramki
ramki.pdf
pdf
ramki
*/
up
3
cmartinezme at hotmail dot com
3 years ago
Checked with version 5.5.12:

It works fine with filenames with utf-8 characters, pathinfo will strip them away:

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

.. will display:

Array
(
    [dirname] => /mnt/files
    [basename] => 飛兒樂團光茫.mp3
    [extension] => mp3
    [filename] => 飛兒樂團光茫
)
up
2
m-symons at home dot com
17 years ago
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);

?>
up
1
christian dot reinecke at web dot de
10 years ago
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
up
2
aalaap at gmail dot com
9 years ago
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;
}
?>
up
1
mrnemesis at ntlworld dot com
10 years ago
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.
up
3
Anonymous
13 years ago
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.
up
2
henrik at not-an-address dot com
10 years ago
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] =>
)
up
1
tom at foo-bar dot co dot uk
10 years ago
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
)
up
0
kc8yds at gmail dot com
9 years ago
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)
up
0
php [spat] hm2k.org
9 years ago
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,'.'));
}

?>
up
0
Lostindream at atlas dot cz
10 years ago
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
)
up
0
phpnet at whoisgregg dot com
11 years ago
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) );
up
-2
ivan dot dossev at gmail dot com
3 years ago
Note: dirname will be "." (meaning current directory) if the path is just a file name. (PHP 5.4.34)
<?php
var_dump
( pathinfo('file.ext', PATHINFO_DIRNAME) ); // string(1) "."
?>
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-3
rob at webdimension dot co dot uk
14 years ago
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
up
-5
admin at torntech dot com
7 years ago
pathinfo will return null if 0 or null is specified for the option argument.
So you'll need to define it's value manually if the option field is omitted, to provide the default functionality.

<?php

   
public function getFileInfo($source = null, $option = null){
        if(!
$option){
           
//1 + 2 + 4
           
$option = PATHINFO_DIRNAME + PATHINFO_BASENAME + PATHINFO_EXTENSION;
            if(
defined('PATHINFO_FILENAME'))
               
$option += PATHINFO_FILENAME; //8
       
}
        return
pathinfo($source, $option);
    }

   
$obj->getFileInfo("/test/file/someFile.txt");
?>
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-4
benjaminhill at gmail dot com
9 years ago
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.
up
-4
Jordan Doyle
5 years ago
It's worth nothing that pathinfo returns foo/index.php for the directory when dealing with URLs like foo/index.php/bar
up
-5
jjoss at mail dot ru
9 years ago
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
   
);
  }
?>
up
-5
php-manual at spunts dot net
9 years ago
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
up
-5
davidblinco at gmail dot com
10 years ago
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));
}
?>
up
-4
wxb0328 at hotmail dot com
3 years ago
<?php

// your code goes here
echo phpversion();

print_r(pathinfo("/resources/img/stock/wxb001/美景.png"));

输出:
5.6.4
-2
Array
(
    [
dirname] => /resources/img/stock/wxb001
   
[basename] => 美景.png
   
[extension] => png
   
[filename] => 美景
)
但是在php5.3.3版本中
<?php

// your code goes here
echo phpversion();

print_r(pathinfo("/resources/img/stock/wxb001/美景.png"));
输出:
5.3.3
Array
(
    [
dirname] => /var/www/www.shima.jp.net/resources/img/stock/wxb001
   
[basename] => .png
   
[extension] => png
   
[filename] =>
)
up
-3
albertof at deltasoft dot com dot ar
16 years ago
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];

          }
    }
up
-3
bart at mediawave dot nl
3 years ago
PHP equivalent for custom implementations. Will be nearly as fast or faster (with long paths):

<?php
$trimPath
= rtrim($path, '/');

$slashPos = strrpos($trimPath, '/');
if (
$slashPos !== false) {
   
$dirName = substr($trimPath, 0, $slashPos) ?: '/';
   
$baseName = substr($trimPath, $slashPos + 1);
} else {
   
$dirName = '.';
   
$baseName = $trimPath;
}

$dotPos = strrpos($baseName, '.');
if (
$dotPos !== false) {
   
$fileName = substr($baseName, 0, $dotPos);
   
$extension = substr($baseName, $dotPos + 1);
} else {
   
$extension = '';
   
$fileName = $baseName;
}
?>
up
-4
leons87_AT_hotmail_DOT_com
10 years ago
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.
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-5
cochise_chiracahua at hotmail.com
12 years ago
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
)
up
-3
smartdog at tut.by
1 year ago
Lightweight way to get extension for *nix systems
<?php
function get_extension($path)
{
   
$c = preg_match('#[^\/]+\.([^\.]*)$#uis', $path, $tmp);
    return
$c ? $tmp[1] : null;
}
?>
this will return NULL for dotfiles (hidden files)

Testing:
<?php
$test
= array(
   
'/normal_dir/normal.foo',
   
'/double_ext.foo.bar',
   
'/.hidden/empty_ext.',
   
'/.hidden_dir/.hidden_file',
   
'/foo.bar/no_ext'
);
foreach(
$test as $path) {
   
var_dump(parse_extension($path));
}
?>

results:
string(3) "foo"
string(3) "bar"
string(0) ""
NULL
NULL

if you want to get all extensions (substring of file name after first dot) use another expression:
<?php
$c
= preg_match('#[^\.|\/]+\.([^\/]*)$#uis', $path, $tmp);
?>
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-4
daniel_rhodes at yahoo dot co dot uk
1 year ago
Note that pathinfo($somePath, PATHINFO_EXTENSION) will return '' (empty string) for both of these paths:

- some_random_file
- another_strange_file_ending_in_dot.

That's good, but then note that pathinfo($somePath, PATHINFO_FILENAME) won't end in the dot for 'another_strange_file_ending_in_dot.' - you'll need pathinfo($somePath, PATHINFO_BASENAME) to get the original filename ending in a dot.

Hope this helps!
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-6
qutechie at gmail dot com
10 years ago
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'],'.'));
              }

?>
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