file_exists(3) [php man page]

FILE_EXISTS(3)								 1							    FILE_EXISTS(3)

file_exists - Checks whether a file or directory exists

SYNOPSIS

       bool file_exists (string  $filename)

DESCRIPTION

	Checks whether a file or directory exists.

PARAMETERS

	      o $filename
		- Path to the file or directory.  On windows, use //computername/share/filename or \computernamesharefilename to check files on
		network shares.

RETURN VALUES

	Returns TRUE if the file or directory specified by $filename exists; FALSE otherwise.

       Note

	       This function will return FALSE for symlinks pointing to non-existing files.

       Warning

	       This function returns FALSE for files inaccessible due to safe mode restrictions. However these files still can be included if they
	      are located in safe_mode_include_dir.

       Note

	       The check is done using the real UID/GID instead of the effective one.

       Note

	       Because PHP's integer type is signed and many platforms use 32bit integers, some filesystem functions may return unexpected results
	      for files which are larger than 2GB.

EXAMPLES

       Example #1

	      Testing whether a file exists

	      <?php
	      $filename = '/path/to/foo.txt';

	      if (file_exists($filename)) {
		  echo "The file $filename exists";
	      } else {
		  echo "The file $filename does not exist";
	      }
	      ?>

ERRORS
/EXCEPTIONS
	Upon failure, an E_WARNING is emitted.

NOTES

       Note

	      The results of this function are cached. See clearstatcache(3) for more details.

       Tip

	      As of PHP 5.0.0, this function can also be used with some URL wrappers. Refer to "Supported Protocols  and  Wrappers"  to  determine
	      which wrappers support stat(3) family of functionality.

SEE ALSO

       is_readable(3), is_writable(3), is_file(3), file(3).

PHP Documentation Group 													    FILE_EXISTS(3)

SCANDIR(3)								 1								SCANDIR(3)

scandir - List files and directories inside the specified path

SYNOPSIS

       array scandir (string  $directory, [int	$sorting_order = SCANDIR_SORT_ASCENDING], [resource  $context])

DESCRIPTION

	Returns an array of files and directories from the $directory.

PARAMETERS

	      o $directory
		- The directory that will be scanned.

	      o $sorting_order
		-  By default, the sorted order is alphabetical in ascending order. If the optional $sorting_order is set to SCANDIR_SORT_DESCEND-
		ING, then the sort order is alphabetical in descending order. If it is set to SCANDIR_SORT_NONE then the result is unsorted.

	      o $context
		- For a description of the $context parameter, refer to the streams section of the manual.

RETURN VALUES

	Returns an array of filenames on success, or FALSE on failure. If $directory is not a directory, then boolean FALSE is	returned,  and	an
       error of level E_WARNING is generated.

CHANGELOG

       +--------+---------------------------------------------------+
       |Version |						    |
       |	|						    |
       |	|		     Description		    |
       |	|						    |
       +--------+---------------------------------------------------+
       | 5.4.0	|						    |
       |	|						    |
       |	| $sorting_orderconstants  were  added. Any nonzero |
       |	| value caused descending order  in  previous  ver- |
       |	| sions. So for all PHP versions, use 0 for ascend- |
       |	| ing order, and 1 for descending order. An  option |
       |	| for  SCANDIR_SORT_NONE  behavior  did  not  exist |
       |	| prior to PHP 5.4.0.				    |
       |	|						    |
       +--------+---------------------------------------------------+
EXAMPLES

       Example #1

	      A simple scandir(3) example

	      <?php
	      $dir    = '/tmp';
	      $files1 = scandir($dir);
	      $files2 = scandir($dir, 1);

	      print_r($files1);
	      print_r($files2);
	      ?>

	      The above example will output something similar to:

	      Array
	      (
		  [0] => .
		  [1] => ..
		  [2] => bar.php
		  [3] => foo.txt
		  [4] => somedir
	      )
	      Array
	      (
		  [0] => somedir
		  [1] => foo.txt
		  [2] => bar.php
		  [3] => ..
		  [4] => .
	      )

       Example #2

	      PHP 4 alternatives to scandir(3)

	      <?php
	      $dir = "/tmp";
	      $dh  = opendir($dir);
	      while (false !== ($filename = readdir($dh))) {
		  $files[] = $filename;
	      }

	      sort($files);

	      print_r($files);

	      rsort($files);

	      print_r($files);

	      ?>

	      The above example will output something similar to:

	      Array
	      (
		  [0] => .
		  [1] => ..
		  [2] => bar.php
		  [3] => foo.txt
		  [4] => somedir
	      )
	      Array
	      (
		  [0] => somedir
		  [1] => foo.txt
		  [2] => bar.php
		  [3] => ..
		  [4] => .
	      )

NOTES

       Tip

	      A URL can be used as a filename with this function if the fopen wrappers have been enabled. See fopen(3) for more details on how	to
	      specify  the filename. See the "Supported Protocols and Wrappers" for links to information about what abilities the various wrappers
	      have, notes on their usage, and information on any predefined variables they may provide.

SEE ALSO

       opendir(3), readdir(3), glob(3), is_dir(3), sort(3).

PHP Documentation Group 														SCANDIR(3)