Code Examples -> getDirArray(Path,Filter,Sorted): Returns an array of the files in a directory, filtered by regular expression and either sorted or randomized. Good for random pictures and graphics.

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PHP Code Examples

Title :	getDirArray(Path,Filter,Sorted): Returns an array of the files in a directory, filtered by regular expression and either sorted or randomized. Good for random pictures and graphics.
Categories :	PHP, Filesystem, Directories	Glen Davis
Date :	Jan 15th 2000
Grade :	2 of 5 (graded 3 times)
Viewed :	13899
File :	dir.php3
Images :	No Images for this code example.

Search :	More code by Glen Davis
Action :	Grade This Code Example
Tools :	My Examples List

Code

<?php
// Returns an array of files from a given directory
// Parameters:
// $Path: directory to get files for (trailing '/' optional)
// $Filter: case-insensitive regular expression (e.g.. ".*html?")
// $Sorted: any value other than "True"/"true" will randomize the array
// Returns 0 if no files match criteria or an array containing the results
// Does not return directories (including '.' and '..')
// adapted from www.php.net documentation

// Very useful for random image display on a page without having to
// use some arbitrary naming scheme

function getDirArray($Path="./",$Filter=".*",$Sorted="True")
{
        $handle=opendir($Path);
        while ($file = readdir($handle)) {
if (is_file("$Path/$file") && eregi("$Filter", $file)) {
                 $dirArray[] = $file;
                }
        }
        closedir($handle);

        if (!is_array($dirArray)) {
                return 0;
        }

        if (strcasecmp($Sorted,"True")) {
                shuffle($dirArray); // May not work on some systems. See php docs
        } else {
                sort($dirArray);
        }

        return $dirArray;
}

// Check these samples to see how it works in practice

print "<HTML><HEAD><TITLE>PHP Directory Listing</TITLE></HEAD><BODY>\n";

        print "<H3>All files in current directory</H3>\n";
        $FileList = getDirArray();
        if ($FileList) {
                while (list($key,$val) = each($FileList)) {
                        print "$key: $val<br>\n";
        }
        }

        print "<H3>Graphics files in alphabetical order</H3>\n";
        $FileList = getDirArray("./",".*jpg$|.*gif$|.*png$");
        if ($FileList) {
                while (list($key,$val) = each($FileList)) {
                        print "$key: $val<br>\n";
        }
        }

        print "<H3>Graphics files in random order</H3>\n";
        $FileList = getDirArray("./",".*jpg$|.*gif$|.*png$","random");
        if ($FileList) {
                while (list($key,$val) = each($FileList)) {
                        print "$key: $val<br>\n";
        }
        }

print "</BODY></HTML>";
?>

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User Comments

Glen Davis wrote :177
UPDATE: Call `srand(time());` right before `shuffle($dirArray)` in the `if` clause near the end of the function.