<?php

  class sql
  {
    protected $db;

    public $prefix_code;
    public $prefix_value;

    function __construct($db, $prefix_code = "", $prefix_value = "")
    { $this->db = $db;
      $this->prefix_code = $prefix_code;
      $this->prefix_value = $prefix_value;
    }

    function query($sql)
    { $rst = $this->db->query($this->prefix_code ? str_replace($this->prefix_code, $this->prefix_value, $sql) : $sql);
      if($rst) return $rst;
      throw new Exception("  [erreur] sql : erreur dans une requete");
    }

    function insert_id()
    { return $this->db->insert_id();
    }

    function fetch_assoc($rst)
    { return $this->db->fetch_assoc($rst);
    }

    function free_result($rst)
    { return $this->db->free_result($rst);
    }

    function close()
    { return $this->db->close();
    }

  }

?>