pathinfo

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

Returns information about a file path

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

pathinfo() returns information about path: either an associative array or a string, depending on options.

Parameters:

path

The path to be parsed.

options

If present, specifies a specific element to be returned; one of PATHINFO_DIRNAME, PATHINFO_BASENAME, PATHINFO_EXTENSION or PATHINFO_FILENAME.

If options is not specified, returns all available elements.

Returns:

If the options parameter is not passed, an associative array containing the following elements is returned: dirname, basename, extension (if any), and filename.

Note:

If the path has more than one extension, PATHINFO_EXTENSION returns only the last one and PATHINFO_FILENAME only strips the last one. (see first example below).

Note:

If the path does not have an extension, no extension element will be returned (see second example below).

If options is present, returns a string containing the requested element.

Changelog:

5.2.0

The PATHINFO_FILENAME constant was added.

Notes:

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

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.

Examples:

pathinfo() Example

<?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"; // since PHP 5.2.0
?>

The above example will output:

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

pathinfo() example showing difference between null and no extension

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

The above example will output something similar to:

string(0) ""

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