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PeakGao

別讀成痞子高

老外用php寫的一個MySQL類

Description:

Extremely easy to use and full-featured MySQL class with measured queries.

Code:

<?

/*****************************************************************************/

/* */

/* mySQL Function Wrapper Class */

/* */

/* Wed 21 Nov 17:41:53 2001 */

/* Thu 29 Nov 19:20:22 2001 -lu */

/* */

/*****************************************************************************/

define("CMySQL_Included","1");

class CMySQL

{

// default values

var $def_host = "localhost"; // default host name

var $def_user = ""; // default user name

var $def_pass = ""; // default password

var $def_dbname = "service"; // default database name

// class-internal variables

var $linkid = 0; // mysql link id

var $errstr = ""; // last mysql error string

var $lastsql = ""; // last mysql query

var $last_result; // last mysql query result

var $m_start = 0;

var $m_diff = 0;

/* Constructor:

* Set default values and stuff.

*/

function CMySQL()

{

$errstr = "no connection";

}

/* CMySQL->Open:

* Connect to specified mySQL server.

*/

function Open($dbname="",$host="",$user="",$pass="",$pcon=0)

{

// use defaults?

if (!$dbname) $dbname = $this->def_dbname;

if (!$host ) $host = $this->def_host;

if (!$user ) $user = $this->def_user;

if (!$pass ) $pass = $this->def_pass;

// open persistent or normal connection

if ($pcon) {

$this->linkid = @mysql_pconnect($host,$user,$pass);

} else {

$this->linkid = @mysql_connect ($host,$user,$pass);

}

// connect to mysql server failed?

if (!$this->linkid)

{

$this->errstr = $pcon ? "persistent " : "";

$this->errstr .= "connect failed ('$user:$pass@$host')";

return 0; // error

}

// select database

$result = mysql_select_db($dbname);

if (!$result)

{

// db select failed

@mysql_close($this->linkid);

$this->errstr = "database not found ('$dbname')";

return 0; // error

}

// return with success

return 1;

}

/* CMySQL->Test:

* Tests a database connection and returns

* 1 on success or 0 on error.

*/

function Test($dbname,$host="",$user="",$pass="")

{

return $this->Open($dbname,$host,$user,$pass,0);

}

/* CMySQL->Error:

* Returns the last mySQL error as text.

*/

function Error()

{

if (!empty($this->errstr))

return $this->errstr."<br>\n";

if (empty($this->linkid))

{

$this->errstr = "no connection";

$em = $this->errstr;

}

else {

$en = @mysql_errno($this->linkid);

$em = @mysql_error($this->linkid);

if (!$en || !$em)

{

$this->errstr = "no connection";

$em = $this->errstr;

if (!$en) $en = "0";

}

return "$em (#$en)<br>\n";

}

/* CMySQL->Kill:

* Dies script with last mySQL error message.

*/

function Kill()

{

die ($this->Error());

}

/* CMySQL->ErrorNum:

* Returns the last mySQL error as number.

*/

function ErrorNum()

{

return @mysql_errno($this->linkid);

}

/* CMySQL->Close:

* Close current mySQL connection.

*/

function Close()

{

return @mysql_close($this->linkid);

}

/* CMySQL->Query:

* Executes the given SQL query and returns

* the proper results.

*/

function Query($sql="")

{

$this->lastsql = $sql;

$this->last_result = @mysql_query($sql,$this->linkid);

if (!$this->last_result)

{

$this->errstr = "query failed ('$sql')";

return 0; // error

}

return $this->last_result;

}

/* CMySQL->QueryM:

* Executes the given SQL query, measures

* it and returns the proper results.

*/

function QueryM($sql="")

{

$this->Start();

$result = $this->Query($sql);

$this->Stop();

return $result;

}

/* CMySQL->Start:

* Starts time measurement.

*/

function Start()

{

$parts = explode(" ",microtime());

$this->m_diff = 0;

$this->m_start = $parts[1].substr($parts[0],1);

}

/* CMySQL->Stop:

* Stops time measurement.

*/

function Stop()

{

$parts = explode(" ",microtime());

$m_stop = $parts[1].substr($parts[0],1);

$this->m_diff = ($m_stop - $this->m_start);

$this->m_start = 0;

}

/* CMySQL->Duration:

* Returns last measured duration (time

* between Start() and Stop()).

*/

function Duration($decimals=4)

{

return number_format($this->m_diff,$decimals);

}

/* CMySQL->Rows:

* Returns the last query's number of rows.

*/

function Rows()

{

if (!$this->last_result) return 0;

return @mysql_num_rows($this->last_result);

}

/* CMySQL->Fix:

* Returns string suitable for mySQL queries.

*/

function Fix($str)

{

return @addslashes($str);

}

/* CMySQL->Unfix:

* Returns mySQL string as normal string.

*/

function Unfix($str)

{

return @stripslashes($str);

}

/* CMySQL->Row:

* Reads the current row and returns contents

* as an PHP object or returns 0 on error.

*/

function Row()

{

if ($this->last_result) {

$row = mysql_fetch_object($this->last_result);

} else {

$row = 0;

}

return $row;

}

/* CMySQL->RowA:

* Reads the current row and returns contents

* as an array or returns 0 on error.

*/

function RowA()

{

if ($this->last_result) {

$row = mysql_fetch_array($this->last_result);

} else {

$row = 0;

}

return $row;

}

/* CMySQL->Seek:

* Sets the internal database pointer to the

* specified row number and returns the result.

*/

function Seek($rownum)

{

return mysql_data_seek($this->last_result,$rownum);

}

/* CMySQL->Free:

* Frees memory used by the query results and

* returns the function result.

*/

function Free()

{

return @mysql_free_result($this->last_result);

}

/*****************************************************************************/

?>

posted on 2007-04-03 18:43 PeakGao 閱讀(484) 評論(0) 編輯收藏引用所屬分類: 數據庫開發、php

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