wp upload file to media library

wp-upload-file.php

<?php
class Upload_File {

    function upload_file( $file_url ) {
        $path_info = pathinfo($file_url);
        $file_name = $path_info['filename'];
        $attachment_id = $this->get_attachment_id_by_filename($file_name);

        if( !$attachment_id ) {
            // does not exist yet, upload
            $attachment_id = $this->upload_file_from_url($file_url);
        }

        return $attachment_id;
    }

    function upload_file_from_url( $file_url ) {
    
        require_once( ABSPATH . 'wp-admin/includes/file.php' );
    
        // download to temp dir
        $temp_file = download_url( $file_url );
    
        if( is_wp_error( $temp_file ) ) return false; 
    
        // move the temp file into the uploads directory
        $file = [
            'name'     => basename( $file_url ),
            'type'     => mime_content_type( $temp_file ),
            'tmp_name' => $temp_file,
            'size'     => filesize( $temp_file ),
        ];
        $sideload = wp_handle_sideload($file, ['test_form' => false]);
    
        if( ! empty( $sideload[ 'error' ] ) ) return false; 
    
        // add to media library
        $attachment_id = wp_insert_attachment(
            [
                'guid'           => $sideload[ 'url' ],
                'post_mime_type' => $sideload[ 'type' ],
                'post_title'     => basename( $sideload[ 'file' ] ),
                'post_content'   => '',
                'post_status'    => 'inherit',
            ],
            $sideload[ 'file' ]
        );
    
        if( is_wp_error( $attachment_id ) || ! $attachment_id ) {
            return false;
        }
    
        // update medatata, regenerate image sizes
        require_once( ABSPATH . 'wp-admin/includes/image.php' );
    
        wp_update_attachment_metadata(
            $attachment_id,
            wp_generate_attachment_metadata( $attachment_id, $sideload[ 'file' ] )
        );
    
        return $attachment_id;
    }
    
    function get_attachment_id_by_filename($file_name){
        global $wpdb;
        $result = $wpdb->get_col($wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE guid LIKE '%s' LIMIT 1;", '%' . $wpdb->esc_like($file_name) . '%' ));
        if( $result ) {
            return $result[0];
        }
        return false;
    }

}

$uploader = new Upload_File();
$uploader->upload_file('file_url_here');