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)

MOVE_UPLOADED_FILE(3)							 1						     MOVE_UPLOADED_FILE(3)

move_uploaded_file - Moves an uploaded file to a new location

SYNOPSIS

       bool move_uploaded_file (string	$filename, string  $destination)

DESCRIPTION

	This  function	checks to ensure that the file designated by $filename is a valid upload file (meaning that it was uploaded via PHP's HTTP
       POST upload mechanism). If the file is valid, it will be moved to the filename given by $destination.

	This sort of check is especially important if there is any chance that anything done with uploaded files could reveal  their  contents	to
       the user, or even to other users on the same system.

PARAMETERS

	      o $filename
		- The filename of the uploaded file.

	      o $destination
		- The destination of the moved file.

RETURN VALUES

	Returns TRUE on success.

	If $filename is not a valid upload file, then no action will occur, and move_uploaded_file(3) will return FALSE.

	If  $filename  is  a  valid  upload file, but cannot be moved for some reason, no action will occur, and move_uploaded_file(3) will return
       FALSE. Additionally, a warning will be issued.

EXAMPLES

       Example #1

	      Uploading multiple files

	      <?php
	      $uploads_dir = '/uploads';
	      foreach ($_FILES["pictures"]["error"] as $key => $error) {
		  if ($error == UPLOAD_ERR_OK) {
		      $tmp_name = $_FILES["pictures"]["tmp_name"][$key];
		      $name = $_FILES["pictures"]["name"][$key];
		      move_uploaded_file($tmp_name, "$uploads_dir/$name");
		  }
	      }
	      ?>

NOTES

       Note

	      move_uploaded_file(3) is both safe mode and open_basedir aware. However, restrictions are placed only on the $destination path as to
	      allow  the moving of uploaded files in which $filename may conflict with such restrictions. move_uploaded_file(3) ensures the safety
	      of this operation by allowing only those files uploaded through PHP to be moved.

       Warning

	       If the destination file already exists, it will be overwritten.

SEE ALSO

       is_uploaded_file(3), rename(3), See Handling file uploads for a simple usage example.

PHP Documentation Group 												     MOVE_UPLOADED_FILE(3)