xattr_supported(3) [php man page]

XATTR_SUPPORTED(3)							 1							XATTR_SUPPORTED(3)

xattr_supported - Check if filesystem supports extended attributes

SYNOPSIS

       bool xattr_supported (string  $filename, [int  $flags])

DESCRIPTION

	This functions checks if the filesystem holding the given file supports extended attributes. Read access to the file is required.

PARAMETERS

	      o $filename
		- The path of the tested file.

	      o $flags
		-

	      Supported xattr flags

	      +-----------------+---------------------------------------------------+
	      | 		|						    |
	      |XATTR_DONTFOLLOW |						    |
	      | 		|						    |
	      | 		| Do  not  follow  the symbolic link but operate on |
	      | 		| symbolic link itself. 			    |
	      | 		|						    |
	      +-----------------+---------------------------------------------------+
RETURN VALUES

	This function returns TRUE if filesystem supports extended attributes, FALSE if it doesn't and NULL if it can't be determined (for example
       wrong path or lack of permissions to file).

EXAMPLES

       Example #1

	      xattr_supported(3) example

	       The following code checks if we can use extended attributes.

	      <?php
	      $file = 'some_file';

	      if (xattr_supported($file)) {
		  /* ... make use of some xattr_* functions ... */
	      }

	      ?>

SEE ALSO

       xattr_get(3), xattr_list(3).

PHP Documentation Group 													XATTR_SUPPORTED(3)

XATTR_SET(3)								 1							      XATTR_SET(3)

xattr_set - Set an extended attribute

SYNOPSIS

       bool xattr_set (string  $filename, string  $name, string  $value, [int  $flags])

DESCRIPTION

	This function sets the value of an extended attribute of a file.

       Extended attributes have two different namespaces: user and root. The user namespace is available to all users, while the root namespace is
       available only to users with root privileges. xattr operates on the user namespace by default, but this can  be	changed  with  the  $flags
       parameter.

PARAMETERS

	      o $filename
		- The file in which we set the attribute.

	      o $name
		-  The	name  of  the extended attribute. This attribute will be created if it doesn't exist or replaced otherwise. You can change
		this behaviour by using the $flags parameter.

	      o $value
		- The value of the attribute.

	      o $flags
		-

	      Supported xattr flags

	      +-----------------+---------------------------------------------------+
	      | 		|						    |
	      |  XATTR_CREATE	|						    |
	      | 		|						    |
	      | 		| Function will fail if extended attribute  already |
	      | 		| exists.					    |
	      | 		|						    |
	      | 		|						    |
	      | XATTR_REPLACE	|						    |
	      | 		|						    |
	      | 		| Function  will fail if extended attribute doesn't |
	      | 		| exist.					    |
	      | 		|						    |
	      | 		|						    |
	      |XATTR_DONTFOLLOW |						    |
	      | 		|						    |
	      | 		| Do not follow the symbolic link  but	operate  on |
	      | 		| symbolic link itself. 			    |
	      | 		|						    |
	      | 		|						    |
	      |   XATTR_ROOT	|						    |
	      | 		|						    |
	      | 		| Set	attribute   in	root  (trusted)  namespace. |
	      | 		| Requires root privileges.			    |
	      | 		|						    |
	      +-----------------+---------------------------------------------------+
RETURN VALUES

	Returns TRUE on success or FALSE on failure.

EXAMPLES

       Example #1

	      Sets extended attributes on .wav file

	      <?php
	      $file = 'my_favourite_song.wav';
	      xattr_set($file, 'Artist', 'Someone');
	      xattr_set($file, 'My ranking', 'Good');
	      xattr_set($file, 'Listen count', '34');

	      /* ... other code ... */

	      printf("You've played this song %d times", xattr_get($file, 'Listen count'));
	      ?>

SEE ALSO

       xattr_get(3), xattr_remove(3).

PHP Documentation Group 													      XATTR_SET(3)