致命错误：无法重新声明类convertThis

Question

调用convertThis课程时，出现以下错误：

  

致命错误：无法重新声明类convertThis   第4行的C：\ xampp \ htdocs \ xproject_private_functions \ convert.php

有人可以帮我吗？

convert.php

<?php

class convertThis
{
 public $err_params;
 public $errurl;
 public $errtype;
 public $errkeyline;
 public static function  errEncoder($err_url, $err_type, $err_keyline)
    {
        $this->errurl= base64_encode($err_url);
        $this->errtype= base64_encode($err_type);
        $this->errkeyline= base64_encode($err_keyline);

        $this->err_params='{:'.hex2bin($err_url.'-'.$err_type.'-'.$err_keyline).':}';

        print $this->err_params;
    }   
}
?>

的index.php

<?

if(file_exists('../_private/_functions/convert.php'))
  {
    require('../_private/_functions/convert.php');
  }
else
  {
        die("Error...file not found!");
  }

$obj= new convertThis();
$obj->errEncoder("http://localhost/af_cbms/index.php?id='36","500","id='36");

?>