how to list all imags in a directory

[yhenew]

i have tried to display all images from a directory. it works almost for all browser, but does not function in mozilla firefox latest version(14.0.1) .it only display the name of the image.the segment of code is the following.

<?php

	// selecting a photo from folder	
  $gallary=$dnn['gallary_photo'];
  $dir ='../../images'. DIRECTORY_SEPARATOR .$gallary.DIRECTORY_SEPARATOR ;
    $imgs = array();

    if ($dh = opendir($dir)) {
        while (($file = readdir($dh)) !== false) {
            if (!is_dir($file) && preg_match("/\.(bmp|jpe?g|gif|png)$/", $file)) {
                array_push($imgs, $file);
            }
        }

        closedir($dh);
    } else {
        die('cannot open ' . $dir);
    }

$emgs = glob($dir."*.*");
for ($i=0; $i<count($emgs); $i++)
{
	$num = $emgs[$i];
	print $num."<br />"; // display full path of the image
	echo '<img src="'.$num.'" alt="random image" />'."<br /><br />";
}
?>

please help me!!!!!

[Dormilich]

you need to check, whether the image path is correct with respect to the browser context.

It cannot be a PHP issue, because PHP is executed on the server.