一介简介的Mysql封装类
- WBOY原創
- 2016-06-21 09:06:06915瀏覽
mysql|封装
class_mysql.php
//######################################################################
//##### TITLE :: CLASS MYSQL
//##### FILE :: class_mysql.php
//##### PROJECT :: WebVision
//##### RELATED DOCUMENT :: None
//##### DESCRIPTION ::
//##### To provide access utility for MySQL access
//##### RunDB is used to run SQL query with the result
//##### grouped into array.
//##### AUTHOR :: Mark Quah
//##### REVISION ::
//######################################################################
class MYSQL
{
var $no_rows=0, $row=array();
var $no_fields=0, $field=array();
//#-----------------------------------------------------------------
//#---- FUNCTION :: MYSQL($p_host, $p_user, $p_passwd, $p_db="mysql")
//#---- DESCRIPTION ::
//#---- Initialize class with information to access server
//#---- No connection will be made at this point.
//#---- INPUT ::
//#---- p_host : server hostname|IP address
//#---- p_user : user name to log into server
//#---- p_passwd : passwd for the user
//#---- p_db : database to be used
//#---- OUTPUT ::
//#---- none
//#-----------------------------------------------------------------
function MYSQL($p_host, $p_user, $p_passwd, $p_db="mysql")
{
$this->sql_host = $p_host;
$this->sql_user= $p_user;
$this->sql_passwd = $p_passwd;
$this->sql_db = $p_db;
} // end MYSQL
//#-----------------------------------------------------------------
//#---- FUNCTION :: RunDB($statement, $exp_result = "")
//#---- DESCRIPTION ::
//#---- Execute a MySQL statement in a non-persistant mode
//#---- INPUT ::
//#---- p_statement : statement to be executed
//#---- exp_result : is result expected?
//#---- value 1 (default): result stored in row array
//#---- value 0: result not stored in row array
//#---- OUTPUT ::
//#---- return "OK" : succesful
//#---- return err_message from mysql_connect
//#---- exp_result==1: additional result stored into array row
//#---- no_row contains no. of record retrieved
//#---- row[recno][ "field" ] contains value of recno record
//#---- field["fieldname"] contains the field list
//#-----------------------------------------------------------------
function RunDB($p_statement, $exp_result = 1)
{
//--- Connect to the Database
$link=mysql_connect($this->sql_host, $this->sql_user, $this->sql_passwd);
if (!$link)
return sprintf("error connecting to host %s, by user %s",
$this->sql_host, $this->sql_user) ;
//--- Select the Database
if (!mysql_select_db($this->sql_db, $link))
{ $err_msg=sprintf("Error in selecting %s database",
$this->sql_db);
$err_msg .= sprintf("error:%d %s", mysql_errno($link),
mysql_error($link));
return $err_msg;
}
//--- Execute the Statement
if (!($this->result=mysql_query($p_statement, $link)))
{ $err_msg=sprintf("Error in selecting %s database\n",
$this->sqldb);
$err_msg .= sprintf("\terror:%d\t\nerror message %s",
mysql_errno($link), mysql_error($link));
return $err_msg;
}
//--- Organize the result
if ($exp_result == 1)
{ $this->no_rows = mysql_num_rows($this->result);
$this->GroupResult();
}
//--- SUCCESS RETURN
return OK;
} // end function RunDB
//#-----------------------------------------------------------------
//#---- FUNCTION :: GroupResult( )
//#---- DESCRIPTION ::
//#---- To group the raw result retrieved in an associative array
//#---- A query has to be made using RunDB prior to this execution
//#---- The handle is storedin $result
//#---- INPUT :: None
//#---- OUTPUT :
//#---- return none
//#---- additional result stored into array
//#---- no_row, row[recno]["field"] = value
//#---- no_field, field["fieldname"]
//#-----------------------------------------------------------------
function GroupResult()
{
//--- Get RESULT
$is_header = FALSE;
for ( $recno = 0; $recno no_rows; $recno ++ )
{ $row = mysql_fetch_object($this->result);
//--- Get Field List
if ( ! $is_header )
{ $no_fields = 0;
$t_row = $row;
while ( $item = each($t_row) )
{ $this->field[$no_fields] = $item["key"];
$no_fields ++;
}
$this->no_fields = $no_fields;
$is_header = TRUE;
}
//---- GET DATA
while ( $item = each($row))
$this->row[$recno][$item["key"]] = $item["value"];
}
//--- END CONNECTION
mysql_free_result($this->result);
} // GroupResult
//#-----------------------------------------------------------------
//#---- FUNCTION :: ShowHTML($p_table="", $p_header = "", $p_cell = "")
//#---- DESCRIPTION ::
//#---- To return the result in HTML Table format
//#---- INPUT ::
//#---- p_table : HTML
| recno"; for ($i = 0; $i no_fields; $i ++) printf(" |
%s", $this->field[$i]); //--- DISPLAY DATA for ( $i = 0; $i no_rows; $i ++) { echo " |
| %-3s", $i); for ($f = 0; $f no_fields; $f ++) { $f_name = $this->field[$f]; $f_value = $this->row[$i][$f_name]; if ( $f_value=="" ) $f_value=" "; printf(" |
%s", $f_value); } } //--- THE END echo " |
} // ShowHTML
} // end class MYSQL
?>
例子:
include("class_mysql.php");
//===== set up sql connection
$mysql=new MYSQL("server", "mysql userid", "mysql passwd", "mysql DB");
//==== Extract Result
$status = $mysql->RunDB("select * from user;");
if ($status != "OK")
{ echo "
DB Error: $status.
";
die;
}
for ($i = 0; $i no_rows; $i ++)
{
echo "Record No: " . ($i + 1) ."
";
for ($j = 0; $j no_fields; $j ++)
{
$field_name = $mysql->field[$j];
echo "Field: ".$field_name." ----- Value: ".
$mysql->row[$i][$field_name]."
";
}
}
//==== Use the built-in ShowHTML format
$status = $mysql->RunDB("select * from user;");
if ($status != "OK")
{ echo "
DB Error: $status.
";
die;
}
$mysql->ShowHTML("","","CENTER");
//==== Run some query not expecting results
$stmt = ("FILL IN YOUR STAEMENT eg. INSERT INTO");
$status = $myql->RunDB($stmt, 0);
if ($status
if ($status != "OK")
{ echo "
DB Fail: $status.
";
die;
}
else
{ echo "
Success: $status.
";
die;
}
?>