custom duplicated image wordpress Christianto @ WPQuestions

/* showing duplicated box */
function print_duplicated_image_box( $post ) {
    wp_nonce_field( 'remove_duplicated_nonce_action', 'remove_duplicated_nonce' ); ?>
    <script type="text/javascript">
    jQuery(document).ready(function(){
        $('#scan-images-duplicated, #delete-images-duplicated').click(function(e){
            e.preventDefault();
            var order = $(this).hasClass('scanimages') ? 'scan' : 'delete_all',
                p_data = {
                    action: 'galleryduplicate',
                    command: order,
                    postID: $('#post_ID').val(),
                    rd_nonce: $('#remove_duplicated_nonce').val()
                },
                spinner = order == 'scan' ? $('#remove-duplicated-box .spinner:eq(0)'):$('#remove-duplicated-box .spinner:eq(1)');
            spinner.show();
            $.ajax({ url: ajaxurl, data: p_data,
                success: function(content){
                    if(order == 'scan'){
                        $('#duplicate-image-result').html(content).css('visibility','visible');
                    } else {
                        $('#duplicate-notification').html(content).css('visibility','visible');
                        setTimeout(function(){
                            $('#duplicate-image-result').animate({height: 0}, 500, function(){$(this).empty().css('height','auto');});
                            $('#duplicate-notification').empty().css({'visibility':'hidden'});
                        },3000)
                    }
                    spinner.hide();
                }
            });
        });
        $('body').on('click', '.delete-attachment', function(e){
            e.preventDefault();
            var deleted = $(this),
                p_data = {
                    action: 'galleryduplicate',
                    command: 'delete',
                    imageid: deleted.attr('id'),
                    postID: $('#post_ID').val(),
                    rd_nonce: $('#remove_duplicated_nonce').val()
                };
            $('#remove-duplicated-box .spinner:eq(0)').show();
            $.ajax({ url: ajaxurl, data: p_data,
                success: function(data){
                    if(data == 'success'){
                        deleted.parent().remove();
                    $('#remove-duplicated-box .spinner:eq(0)').hide();
                    }
                }
            });
        })
    });
    </script>
    <div class="submitbox" id="remove-duplicated-box" style="padding: 10px 0 0;clear: both;border-top: 1px solid whiteSmoke;margin-top: -2px;">
        <input type="submit" class="button scanimages" id="scan-images-duplicated" value="Scan for Duplicate Images" style="float:right">
        <span class="spinner" style="display: none;"></span>
        <div id="duplicate-image-result" style="visibility: hidden; margin: 5px 0 10px; clear:both; float:left"></div>
        <div class="clear" style="border-top: 1px solid #D9D9D9; border-bottom: 1px solid #fff; margin-bottom: 20px;"></div>
        <input type="submit" class="button button-primary button-large" id="delete-images-duplicated" value="Delete Old Duplicate Images" style="float:right">
        <span class="spinner" style="display: none;"></span>
        <p id="duplicate-notification" style="visibility: hidden; height: 1em; margin: 0; padding: 5px 0; text-align: right; clear:both"></p>
    </div>
<?php
}
// add our custom box
function my_duplicated_box() {
    $posttype = array( 'post', 'page' );
    foreach ($posttype as $type) {
        add_meta_box(
            'check_image_duplication',
            __( 'Remove Duplicate Images'),
            'print_duplicated_image_box',
            $type,
            'side',
            'core'
        );
    }
}
add_action( 'add_meta_boxes', 'my_duplicated_box' );

function rename_latest_file($ID, $new_name, $postID){
    $file = get_attached_file($ID);
    $path = pathinfo($file);
    $newfile = $path['dirname']."/".$new_name;

    rename($file, $newfile);
    // update_attached_file( $ID, $newfile );

    $wp_filetype = wp_check_filetype(basename($newfile), null );
    $wp_upload_dir = wp_upload_dir();
    $attachment = array(
        'guid' => $wp_upload_dir['url'] . '/' . basename( $newfile ),
        'post_mime_type' => $wp_filetype['type'],
        'post_title' => preg_replace('/\.[^.]+$/', '', basename($newfile)),
        'post_content' => '',
        'post_status' => 'inherit'
    );

    $attach_id = wp_insert_attachment( $attachment, $newfile, $postID );

    require_once(ABSPATH . 'wp-admin/includes/image.php');
    $attach_data = wp_generate_attachment_metadata( $attach_id, $newfile );
    wp_update_attachment_metadata( $attach_id, $attach_data );

    wp_delete_attachment( $ID, false );
}

/* check image gallery duplicate function */
function check_gallery_duplication(){
    if(!wp_verify_nonce( $_GET['rd_nonce'],  'remove_duplicated_nonce_action' ))
        die;

    $postID = $_GET['postID'];
    $command = $_GET['command'];

    $originalname = $imagedata = $similar = $latestID = $duplicate = array();
    $attachments = get_children( array('post_parent' => $postID, 'post_type' => 'attachment', 'post_mime_type' =>'image', 'orderby' => 'post_date') );

    // get all original name
    foreach($attachments as $image){
        if(!in_array( $image->post_title,$originalname ))
            $originalname[] = $image->post_title;
    }

    foreach($attachments as $image){
        $filename = basename(wp_get_attachment_url($image->ID));
        foreach($originalname as $key){
            preg_match('/'.$key.'.(jpg|png|gif)/i', $filename, $ori);
            if(!empty($ori)){
                $imagedata[$key.'.'.$ori[1]][] = array('value' => 0, 'extension' => $ori[1], 'filename' => $filename, 'ID' => $image->ID );
                $similar[$key.'.'.$ori[1]][] = 0;
            } else {
                preg_match('/'.$key.'(\d+).(jpg|png|gif)/i', $filename, $rev);
                if(!empty($rev)){
                    $imagedata[$key.'.'.$rev[2]][] = array('value' => (int) $rev[1], 'extension' => $rev[2], 'filename' => $filename, 'ID' => $image->ID);
                    $similar[$key.'.'.$rev[2]][] = $rev[1];
                }
            }
        }
    }

    // return only previous image, not latest (largest number of image identifier)
    foreach($imagedata as $key => $image){
        $latest = max($similar[$key]);
        foreach($image as $data){
            if($data['value'] != $latest)
                $duplicate[$key][] = array( 'ID' => $data['ID'], 'filename' => $data['filename'] );
            else
                $latestID[$key] = $data['ID'];
        }
    }

    if($command == 'scan'){
        if(!empty($duplicate)){
            foreach($duplicate as $key => $result){
                echo '<p>'.$key.' <br/><strong>'.count($result).' Duplicates</strong> <a id="'.$key.'" class="delete-attachment" href="#">Delete</a></p>';
            }
        } else {
            echo '<p>No Duplicated Images found </p>';
        }
    } elseif($command == 'delete'){
        if(!empty($duplicate)){
            $image_name = $_GET['imageid'];
            foreach($duplicate[$image_name] as $image){
                wp_delete_attachment( $image['ID'], false );
            }
            rename_latest_file( $latestID[$image_name], $image_name, $postID);
            echo 'success';
        }
    } else if($command == 'delete_all'){
        foreach($duplicate as $key => $data){
            foreach($data as $image){
                wp_delete_attachment( $image['ID'], false );
            }
            rename_latest_file( $latestID[$key], $key, $postID);
        }
        echo 'Images succesfully deleted!';
    }

    die;
}
add_action('wp_ajax_galleryduplicate', 'check_gallery_duplication');