PHP操作MySQL数据库的类

PHP

#mysql #数据库封装 #类2012-05-11 21:57

这个类很好用的说。以后常来一个网yige.org

class dbstuff {

var $querynum = 0;

var $link;

var $charset;

function connect($dbhost, $dbuser, $dbpw, $dbname = '', $pconnect = 0, $halt = TRUE) {

if($pconnect) {

if(!$this->link = @mysql_pconnect($dbhost, $dbuser, $dbpw)) {

$halt && $this->halt('Can not connect to MySQL server');

}

} else {

if(!$this->link = @mysql_connect($dbhost, $dbuser, $dbpw, 1)) {

$halt && $this->halt('Can not connect to MySQL server');

}

}

if($this->version() > '4.1') {

if($this->charset) {

@mysql_query("SET character_set_connection=$this->charset, character_set_results=$this->charset, character_set_client=binary", $this->link);

}

if($this->version() > '5.0.1') {

@mysql_query("SET sql_mode=''", $this->link);

}

}

if($dbname) {

@mysql_select_db($dbname, $this->link);

}

mysql_query("SET NAMES utf8");

}

function select_db($dbname) {

return mysql_select_db($dbname, $this->link);

}

function fetch_array($query, $result_type = MYSQL_ASSOC) {

return mysql_fetch_array($query, $result_type);

}

function query($sql, $type = '') {

if(YIGEBUG) {

global $yigecms;

$sqlstarttime = $sqlendttime = 0;

$mtime = explode(' ', microtime());

$sqlstarttime = number_format(($mtime[1] + $mtime[0] - time()), 6) * 1000;

}

$func = $type == 'UNBUFFERED' && @function_exists('mysql_unbuffered_query') ?

'mysql_unbuffered_query' : 'mysql_query';

if(!($query = $func($sql, $this->link)) && $type != 'SILENT') {

$this->halt('MySQL Query Error', $sql);

}

if(YIGEBUG) {

$mtime = explode(' ', microtime());

$sqlendttime = number_format(($mtime[1] + $mtime[0] - time()), 6) * 1000;

$sqltime = round(($sqlendttime - $sqlstarttime), 3);

$explain = array();

$info = mysql_info();

if($query && preg_match("/^(select )/i", $sql)) {

$explain = mysql_fetch_assoc(mysql_query('EXPLAIN '.$sql, $this->link));

}

$yigecms['debug_query'][] = array('sql'=>$sql, 'time'=>$sqltime, 'info'=>$info, 'explain'=>$explain);

}

$this->querynum++;

return $query;

}

function affected_rows() {

return mysql_affected_rows($this->link);

}

function error() {

return (($this->link) ? mysql_error($this->link) : mysql_error());

}

function errno() {

return intval(($this->link) ? mysql_errno($this->link) : mysql_errno());

}

function result($query, $row) {

$query = @mysql_result($query, $row);

return $query;

}

function num_rows($query) {

$query = mysql_num_rows($query);

return $query;

}

function num_fields($query) {

return mysql_num_fields($query);

}

function free_result($query) {

return mysql_free_result($query);

}

function insert_id() {

return ($id = mysql_insert_id($this->link)) >= 0 ? $id : $this->result($this->query("SELECT last_insert_id()"), 0);

}

function fetch_row($query) {

$query = mysql_fetch_row($query);

return $query;

}

function fetch_fields($query) {

return mysql_fetch_field($query);

}

function version() {

return mysql_get_server_info($this->link);

}

function close() {

return mysql_close($this->link);

}

function halt($message = '', $sql = '') {

echo "

MySQL Error

Message: $message

SQL: $sql

Error: ".$this->error()."

Errno.: ".$this->errno()."";

exit();

}

}

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