php man page for pathinfo

PATHINFO(3)								 1							       PATHINFO(3)

pathinfo - Returns information about a file path

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

DESCRIPTION
       pathinfo(3) returns information about $path: either an associative array or a string, depending on $options.

PARAMETERS
	      o $path
		- The path to be parsed.

	      o $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.

RETURN VALUES
	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
       +--------+--------------------------------------------+
       |Version |					     |
       |	|					     |
       |	|		 Description		     |
       |	|					     |
       +--------+--------------------------------------------+
       | 5.2.0	|					     |
       |	|					     |
       |	|  The PATHINFO_FILENAME constant was added. |
       |	|					     |
       +--------+--------------------------------------------+
EXAMPLES
       Example #1

	      pathinfo(3) Example

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

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

	      The above example will output:

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

       Example #2

	      pathinfo(3) 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

NOTES
       Note

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

       Note

	      pathinfo(3) is locale aware, so for it to parse a path containing multibyte characters correctly, the matching locale  must  be  set
	      using the setlocale(3) function.

SEE ALSO
       dirname(3), basename(3), parse_url(3), realpath(3).

PHP Documentation Group 													       PATHINFO(3)