PHP Tutorial - PHP is_writable() Function

Definition

The is_writable() function checks whether the specified file is writeable.

Syntax

PHP is_writable() Function has the following syntax.

is_writable(file)

Parameter

Parameter	Is Required	Description
file	Required.	File to check

Return

This function returns TRUE if the file is writeable.

Note

The result of this function are cached. Use clearstatcache() to clear the cache.

Example

is_writeable() returns true if the string parameter is writeable.

For example, to check whether a file is writeable:


<?PHP/*  www. ja  v a2  s.c o  m*/
      $filename = 'c:\boot.ini'; // Windows
     // $filename = '/etc/passwd'; // Unix

      if (is_writeable($filename)) {
             print 'File writeable!';
      } else {
             print 'File not writeable!';
      }
?>

The code above generates the following result.