Php/docs/function.readdir
readdir
(PHP 4, PHP 5, PHP 7)
readdir — Read entry from directory handle
Description
readdir
([ resource $dir_handle
] ) : string|false
Returns the name of the next entry in the directory. The entries are returned in the order in which they are stored by the filesystem.
Parameters
dir_handle- The directory handle resource previously opened with opendir(). If the directory handle is not specified, the last link opened by opendir() is assumed.
Return Values
Returns the entry name on success or FALSE on failure.
Warning
This function may
return Boolean FALSE, but may also return a non-Boolean value which
evaluates to FALSE. Please read the section on Booleans for more
information. Use the ===
operator for testing the return value of this
function.
Examples
Example #1 List all entries in a directory
Please note the fashion in which readdir()'s
return value is checked in the examples below. We are explicitly
testing whether the return value is identical to (equal to and of
the same type as--see Comparison
Operators for more information) FALSE since otherwise,
any directory entry whose name evaluates to FALSE will stop the
loop (e.g. a directory named "0").
<?phpif ($handle = opendir('/path/to/files')) { echo "Directory handle: $handle\n"; echo "Entries:\n"; /* This is the correct way to loop over the directory. */ while (false !== ($entry = readdir($handle))) { echo "$entry\n"; } /* This is the WRONG way to loop over the directory. */ while ($entry = readdir($handle)) { echo "$entry\n"; } closedir($handle);}?>
Example #2
List all entries in the current directory and strip out .
and ..
<?phpif ($handle = opendir('.')) { while (false !== ($entry = readdir($handle))) { if ($entry != "." && $entry != "..") { echo "$entry\n"; } } closedir($handle);}?>
