本文实例讲述了PHP封装的MSSql操作类。分享给大家供大家参考,具体如下:
<?php
/*MSSql的操作类*/
class MSSql {
var $link;
var $querynum = 0;
/*连接MSSql数据库,参数:dbsn->数据库服务器地址,dbun->登陆用户名,dbpw->登陆密码,dbname->数据库名字*/
function Connect($dbsn, $dbun, $dbpw, $dbname) {
if($this->link = @mssql_connect($dbsn, $dbun, $dbpw, true)) {
$query = $this->Query('SET TEXTSIZE 2147483647');
if (@mssql_select_db($dbname, $this->link)) {
} else {
$this->halt('Can not Select DataBase');
}
} else {
$this->halt('Can not connect to MSSQL server');
}
}
/*执行sql语句,返回对应的结果标识*/
function Query($sql) {
if($query = @mssql_query($sql, $this->link)) {
$this->querynum++;
return $query;
} else {
$this->querynum++;
$this->halt('MSSQL Query Error', $sql);
}
}
/*执行Insert Into语句,并返回最后的insert操作所产生的自动增长的id*/
function Insert($table, $iarr) {
$value = $this->InsertSql($iarr);
$query = $this->Query('INSERT INTO ' . $table . ' ' . $value . '; SELECT SCOPE_IDENTITY() AS [insertid];');
$record = $this->GetRow($query);
$this->Clear($query);
return $record['insertid'];
}
/*执行Update语句,并返回最后的update操作所影响的行数*/
function Update($table, $uarr, $condition = '') {
$value = $this->UpdateSql($uarr);
if ($condition) {
$condition = ' WHERE ' . $condition;
}
$query = $this->Query('UPDATE ' . $table . ' SET ' . $value . $condition . '; SELECT @@ROWCOUNT AS [rowcount];');
$record = $this->GetRow($query);
$this->Clear($query);
return $record['rowcount'];
}
/*执行Delete语句,并返回最后的Delete操作所影响的行数*/
function Delete($table, $condition = '') {
if ($condition) {
$condition = ' WHERE ' . $condition;
}
$query = $this->Query('DELETE ' . $table . $condition . '; SELECT @@ROWCOUNT AS [rowcount];');
$record = $this->GetRow($query);
$this->Clear($query);
return $record['rowcount'];
}
/*将字符转为可以安全保存的mssql值,比如a'a转为a''a*/
function EnCode($str) {
return str_replace(''', '''', str_replace('', '', $str));
}
/*将可以安全保存的mssql值转为正常的值,比如a''a转为a'a*/
function DeCode($str) {
return str_replace('''', ''', $str);
}
/*将对应的列和值生成对应的insert语句,如:array('id' => 1, 'name' => 'name')返回([id], [name]) VALUES (1, 'name')*/
function InsertSql($iarr) {
if (is_array($iarr)) {
$fstr = '';
$vstr = '';
foreach ($iarr as $key => $val) {
$fstr .= '[' . $key . '], ';
$vstr .= ''' . $val . '', ';
}
if ($fstr) {
$fstr = '(' . substr($fstr, 0, -2) . ')';
$vstr = '(' . substr($vstr, 0, -2) . ')';
return $fstr . ' VALUES ' . $vstr;
} else {
return '';
}
} else {
return '';
}
}
/*将对应的列和值生成对应的insert语句,如:array('id' => 1, 'name' => 'name')返回[id] = 1, [name] = 'name'*/
function UpdateSql($uarr) {
if (is_array($uarr)) {
$ustr = '';
foreach ($uarr as $key => $val) {
$ustr .= '[' . $key . '] = '' . $val . '', ';
}
if ($ustr) {
return substr($ustr, 0, -2);
} else {
return '';
}
} else {
return '';
}
}
/*返回对应的查询标识的结果的一行*/
function GetRow($query, $result_type = MSSQL_ASSOC) {
return mssql_fetch_array($query, $result_type);
}
/*清空查询结果所占用的内存资源*/
function Clear($query) {
return mssql_free_result($query);
}
/*关闭数据库*/
function Close() {
return mssql_close($this->link);
}
function halt($message = '', $sql = '') {
$message .= '<br />MSSql Error:' . mssql_get_last_message();
if ($sql) {
$sql = '<br />sql:' . $sql;
}
exit("DataBase Error.<br />Message $message $sql");
}
}
?>
希望本文所述对大家PHP程序设计有所帮助。
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