以下是我在工作中常用的一个php中对sql server2000中数据操纵的一个公共odbc操纵类,希望能够给各位初学php的同仁一点点帮助
<? file://include ("odbc_para.php"); $DbName="localhost"; $DbUser="sa"; $DbPassWord="";//在这里进行定义连接odbc的数据库名,用户名,及密码,实际中以数据库的用户
file://名及密码为标准。
define(C_DB_HOST,$Host); define(C_DB_NAME,$DbName); define(C_DB_USER,$DbUser); define(C_DB_PASS,$DbPassWord);
class Odbc{ var $Host = C_DB_HOST; // Hostname of our MySQL server var $Database = C_DB_NAME; // Logical database name on that server var $User = C_DB_USER; // Database user var $Password = C_DB_PASS; // Database user's password var $UseODBCCursor = 0;
var $Link_ID = 0; // Result of mysql_connect() var $Query_ID = 0; // Result of most recent mysql_query() // var $Record = array(); // Current mysql_fetch_array()-result var $Row = 0; // Current row number var $Errno = 0; // Error state of query var $Error = "";
var $Auto_Free = 0; ## set this to 1 to automatically free results
function Halt($msg) { printf("</td></tr></table><b>Database error:</b> %s<br>\n", $msg); printf("<b>ODBC Error</b>: %s (%s)<br>\n", $this->Errno, $this->Error); die("Session halted."); }
function Connect() { if ( 0 == $this->Link_ID ) { $this->Link_ID=odbc_connect($this->Database, $this->User, $this->Password, $this->UseODBCCursor); if (!$this->Link_ID) { $this->halt("Link-ID == false, odbc_connect failed"); } } } function Close() { if (0 != $this->Link_ID){ odbc_close($this->Link_ID); } }
function Query($Query_String) { $this->Connect(); # printf("<br>Debug: query = %s<br>\n", $Query_String);
# [email protected] suggested that we use this instead of the odbc_exec(). # He is on NT, connecting to a Unix MySQL server with ODBC. -- KK # $this->Query_ID = odbc_prepare($this->Link_ID,$Query_String); # $this->Query_Ok = odbc_execute($this->Query_ID); $this->Query_ID = odbc_exec($this->Link_ID,$Query_String); $this->Row = 0; file://odbc_binmode($this->Query_ID, 1); file://odbc_longreadlen($this->Query_ID, 4096000); if (!$this->Query_ID) { $this->Errno = 1; $this->Error = "General Error (The ODBC interface cannot return detailed error messages)."; $this->halt("Invalid SQL: ".$Query_String); } return $this->Query_ID; } function NextRecord() { $this->Record = array(); $this->$stat = odbc_fetch_into($this->Query_ID,&$this->Record, ++$this->Row); if (!$this->$stat) { if ($this->Auto_Free) { odbc_free_result($this->Query_ID); $this->Query_ID = 0; }; } else { // add to Record[<key>] $count = odbc_num_fields($this->Query_ID); for ($i=1; $i<=$count; $i++) $this->Record[strtolower(odbc_field_name ($this->Query_ID, $i)) ] = stripslashes($this->Record[ $i - 1 ]); } return $this->Record; } function Seek($pos) { $this->Row = $pos; }
function MetaData($table) { $count = 0; $id = 0; $res = array();
$this->Connect(); $id = odbc_exec($this->Link_ID, "select * form $table"); if (!$id) { $this->Errno = 1; $this->Error = "General Error (The ODBC interface cannot return detailed error messages)."; $this->halt("Metadata query failed."); } $count = odbc_num_fields($id); for ($i=1; $i<=$count; $i++) { $res[$i]["table"] = $table; $name = odbc_field_name ($id, $i); $res[$i]["name"] = $name; $res[$i]["type"] = odbc_field_type ($id, $name); $res[$i]["len"] = 0; // can we determine the width of this column? $res[$i]["flags"] = ""; // any optional flags to report? } odbc_free_result($id); return $res; }
function NumRows() { # Many ODBC drivers don't support odbc_num_rows() on SELECT statements. $num_rows = odbc_num_rows($this->Query_ID); file://printf ($num_rows."<br>");
# This is a workaround. It is intended to be ugly. if ($num_rows < 0) { $i=10; while (odbc_fetch_row($this->Query_ID, $i)) $i*=10;
$j=0; while ($i!=$j) { $k= $j+intval(($i-$j)/2); if (odbc_fetch_row($this->Query_ID, $k)) $j=$k; else $i=$k; if (($i-$j)==1) { if (odbc_fetch_row($this->Query_ID, $i)) $j=$i; else $i=$j; }; file://printf("$i $j $k <br>"); }; $num_rows=$i; }
return $num_rows; }
function NumFields() { return count($this->Record)/2; } function FieldValue($Field_Name){ return odbc_result($this->Query_ID,$Field_Name);//Record[strtolower($Field_Name)]; } function AffectedRows() { return odbc_num_rows($this->Query_ID); }
} ?>
我的这个操作类是一个odbc接口类。在调用数据操作之前首先需进行odbc的连接,然后再把相应的值付给下面的变量,以便进行操纵:
$DbName="localhost"; $DbUser="sa"; $DbPassWord="";//
假设在odbc连接成功的条件下,对数据库中的表table1进行操作则如下进行:
$db=new Odbc();
$sq1="select * from $table";//选择表中的所有记录
$db->query($sql);
while($result=$db->NextRecrod)
{
echo $result;
}
$db->Close();
.
.
.

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