<?php
    if($_FILES['zip_file']['name'] != ''){
        $output = "";
        $file_name = $_FILES['zip_file']['name'];
        $array = explode(".", $file_name);
        $name = $array[0];
        $ext = $array[1];
        if($ext == 'zip'){
            $path = 'upload/';
            $location = $path . $file_name;
            if(move_uploaded_file($_FILES['zip_file']['tmp_name'], $location)){
                $zip = new ZipArchive;
                if($zip->open($location)){
                    $zip->extractTo($path);
                    $zip->close();
                }
                $files = scandir($path . $name);
                foreach($files as $file){
                    $tmp_ext = explode(".", $file);
                    $file_ext = end($tmp_ext);
                    $allowed_ext = array('jpg', 'png', 'jpeg', 'gif');
                    if(in_array($file_ext, $allowed_ext)){
                        $new_file = $tmp_ext[0].".".$file_ext;

                        $output .= "<br />".$new_file."<center><img src='upload/".$name."/".$new_file."' height='50px' width='50px'/></center>";

                    }
                }
                unlink($path.$name.'.'.$ext);
            }
        }

        echo $output;
    }

?>