is_writable(3) [php man page]

IS_WRITABLE(3)								 1							    IS_WRITABLE(3)

is_writable - Tells whether the filename is writable

SYNOPSIS

       bool is_writable (string  $filename)

DESCRIPTION

	Returns  TRUE  if the $filename exists and is writable. The filename argument may be a directory name allowing you to check if a directory
       is writable.

	Keep in mind that PHP may be accessing the file as the user id that the web server runs as (often 'nobody'). Safe mode limitations are not
       taken into account.

PARAMETERS

	      o $filename
		- The filename being checked.

RETURN VALUES

	Returns TRUE if the $filename exists and is writable.

EXAMPLES

       Example #1

	      is_writable(3) example

	      <?php
	      $filename = 'test.txt';
	      if (is_writable($filename)) {
		  echo 'The file is writable';
	      } else {
		  echo 'The file is not writable';
	      }
	      ?>

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), file_exists(3), fwrite(3).

PHP Documentation Group 													    IS_WRITABLE(3)

IS_READABLE(3)								 1							    IS_READABLE(3)

is_readable - Tells whether a file exists and is readable

SYNOPSIS

       bool is_readable (string  $filename)

DESCRIPTION

	Tells whether a file exists and is readable.

PARAMETERS

	      o $filename
		- Path to the file.

RETURN VALUES

	Returns TRUE if the file or directory specified by $filename exists and is readable, FALSE otherwise.

EXAMPLES

       Example #1

	      is_readable(3) example

	      <?php
	      $filename = 'test.txt';
	      if (is_readable($filename)) {
		  echo 'The file is readable';
	      } else {
		  echo 'The file is not readable';
	      }
	      ?>

ERRORS
/EXCEPTIONS
	Upon failure, an E_WARNING is emitted.

NOTES

	Keep in mind that PHP may be accessing the file as the user id that the web server runs as (often 'nobody'). Safe mode limitations are not
       taken into account before PHP 5.1.5.

       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.

       Note

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

	This function may return TRUE for directories. Use is_dir(3) to distinguish file and directory.

SEE ALSO

       is_writable(3), file_exists(3), fgets(3).

PHP Documentation Group 													    IS_READABLE(3)