<?php
$keyb = 0;
#$dir = 'F:/Images/';
$dir = 'C:/wamp/www/scanner/img/';
$d = scandir($dir);
foreach($d as $dd ) {
    if ( $dd != '.' && $dd != '..' ) {
		$var = @exif_read_data($dir . '\\' . $dd);
		if(!$var)
		{
			$extensions = array();
			array_push($extensions,substr($dd, -3));
			$files[$dd] = mktime(substr($var['DateTimeOriginal'],11,2),substr($var['DateTimeOriginal'],14,2),substr($var['DateTimeOriginal'],17,2),substr($var['DateTimeOriginal'],5,2),substr($var['DateTimeOriginal'],8,2),substr($var['DateTimeOriginal'],0,4));

		}
		else
		{
			if ( exif_read_data($dir . '\\' . $dd) !== false ) {
				//print_r($var);
				$files[$dd] = mktime(substr($var['DateTimeOriginal'],11,2),substr($var['DateTimeOriginal'],14,2),substr($var['DateTimeOriginal'],17,2),substr($var['DateTimeOriginal'],5,2),substr($var['DateTimeOriginal'],8,2),substr($var['DateTimeOriginal'],0,4));
			}
		}
    }
}
asort($files);

/*
	this loop basically does the same thing as the one below it,
	except the extension is based off of what's within the $extensions array
	use print_r if you need to know what something does/contains
*/
$i = 0;
foreach($extensions as $exts)
{
	foreach($files as $key => $val) {
		rename($dir . '\\' . $key,$dir . '\\IMG_' . str_pad($keyb,5,'0',STR_PAD_LEFT).'.'.$exts);
		//echo $dir . '\\' . $key,$dir . '\\IMG_' . str_pad($keyb,5,'0',STR_PAD_LEFT).'.'.$exts."\r\n";
		$keyb++;
	}
$i++;
}

foreach($files as $key => $val) {
    rename($dir . '\\' . $key,$dir . '\\IMG_' . str_pad($keyb,5,'0',STR_PAD_LEFT) . '.JPG');
    $keyb++;
}

?>