Count files in any directory using php..!!

Dr-Wordpress : how to count the number of files in any directory using php.

<?php 
    //Counts starts at 0
    $i = 0; 
    $dir = 'images/Trip_images/';
    if ($handle = opendir($dir)) {
        while (($file = readdir($handle)) !== false){
            if (!in_array($file, array('.', '..')) && !is_dir($dir.$file)) 
                $i++;
        }
    }
    // print count files in directory
    echo "There were $i files";
?>

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