您可以删除else语句，以便用户可以看到消息并能够再次上载csv，或者您可以使用

echo \'<script>windows.location.href="\' . $url . \'"</script>\'; die;

$admin_services = add_menu_page( \'Fee Schedule\', \'Fee Schedule\', \'administrator\', \'pd-  services\', \'pd_services\' );
function pd_services() {
?>
<div class="wrap">
    <form name="csvupload" action="" method="POST" enctype="multipart/form-data">
        <table class="form-table">
            <tr>
                <th><label for="uploadcsv">Upload Services from CSV</label></th>
                <td><input type="file" name="service_upload_csv" id="upload_csv_id" aria-required="true"></td>
            </tr>
            <td>
                <p class="submit">
                    <input type="submit" class="button-primary" name="admin_service_csv_upload"
                           value="<?php _e( \'Save Changes\' ) ?>"/>
                </p>
            </td>
        </table>
    </form>
    <?php echo $content ?>
</div>

function process_pd_services_upload() {
if ( $_SERVER["REQUEST_METHOD"] == "POST" && isset( $_POST[\'admin_service_csv_upload\'] ) ) {
    if ( get_file_extension( $_FILES["service_upload_csv"]["name"] ) != \'csv\' ) {
        $error[] = \'Only CSV files accepted!\';
    }
    if ( ! $error ) {
        $tot    = 0;
        $handle = fopen( $_FILES["service_upload_csv"]["tmp_name"], "r" );
        //echo $file   =  $_FILES["service_upload_csv"]["tmp_name"];
        while ( ( $data = fgetcsv( $handle, 1000, "," ) ) !== false ) {
            for ( $c = 0; $c < 1; $c ++ ) {
                //only run if the first column if not equal to firstname
                if ( $data[0] != \'Department Name\' ) {
                    $insert_csv_query = "INSERT INTO wp_services(
                                dept_name,
                                inc_10_codes,
                                description,
                                uc_fee
                                            )VALUES(
                                \'" . mysql_real_escape_string( $data[0] ) . "\',
                                \'" . mysql_real_escape_string( $data[1] ) . "\',
                                \'" . mysql_real_escape_string( $data[2] ) . "\',
                                \'" . mysql_real_escape_string( $data[3] ) . "\'
                                )";
                    $insert_csv_query;
                    $inserted = $wpdb->query( $insert_csv_query );
                }

                echo $tot ++;
            }
        }
        fclose( $handle );
        $_SESSION[\'pd_services_total_import\'] = $tot;
        wp_safe_redirect( admin_url( \'your admin url here\' ) );
    }
 }
}
add_action( \'wp\', \'process_pd_services_upload\' );