PHP
class Db
{
var $conn; function Db($host="localhost",$user="root",$pass="root",$db="test")
{
if(!$this->conn=MysqL_connect($host,$user,$pass))
die("can't connect to MysqL sever");
MysqL_select_db($db,$this->conn);
MysqL_query("SET NAMES 'UTF-8'");
} function execute($sql)
{
return MysqL_query($sql,$this->conn);
} function findCount($sql)
{
$result=$this->execute($sql);
return MysqL_num_rows($result);
} function findBysql($sql)
{
$array=array();
$result=MysqL_query($sql);
$i=0;
while($row=MysqL_fetch_assoc($result))
{
$array[$i]=$row;
$i++;
}
return $array;
} //$con的几种情况
//空：返回全部记录
//array：eg. array('id'=>'1') 返回id=1的记录
//string :eg. 'id=1' 返回id=1的记录
function toExtJson($table,$start="0",$limit="10",$cons="")
{
$sql=$this->generatesql($table,$cons);
$totalNum=$this->findCount($sql);
$result=$this->findBysql($sql." LIMIT ".$start.",".$limit);
$resultNum = count($result);//当前结果数
$str="";
$str.= "{";
$str.= "'totalCount':'$totalNum',";
$str.="'rows':";
$str.="[";
for($i=0;$i<$resultNum;$i++){
$str.="{";
$count=count($result[$i]);
$j=1;
foreach($result[$i] as $key=>$val)
{
if($j<$count)
{
$str.="'".$key."':'".$val."',";
}
elseif($j==$count)
{
$str.="'".$key."':'".$val."'";
}
$j++;
} $str.="}";
if ($i != $resultNum-1) {
$str.= ",";
}
}
$str.="]";
$str.="}";
return $str;
} function generatesql($table,$cons)
{
$sql="";//sql条件
$sql="select * from ".$table;
if($cons!="")
{
if(is_array($cons))
{
$k=0;
foreach($cons as $key=>$val)
{
if($k==0)
{
$sql.="where '";
$sql.=$key;
$sql.="'='";
$sql.=$val."'";
}else
{
$sql.="and '";
$sql.=$key;
$sql.="'='";
$sql.=$val."'";
}
$k++;
}
}else
{
$sql.=" where ".$cons;
}
}
return $sql;
} function toExtXml($table,".$limit);
$resultNum = count($result);//当前结果数
header("Content-Type: text/xml");
$xml="\n";
$xml.="\n";
$xml.="\t".$totalNum."\n";
$xml.="\t\n";
for($i=0;$i<$resultNum;$i++){
$xml.="\t\t\n";
foreach($result[$i] as $key=>$val)
$xml.="\t\t\t<".$key.">".$val." $xml.="\t\t\n";
}
$xml.="\t\n";
$xml.="\n";
return $xml;
} //输出word表格
function toWord($table,$mapping,$fileName)
{
header('Content-type: application/doc');
header('Content-Disposition: attachment; filename="'.$fileName.'.doc"');
echo ' xmlns:w="urn:schemas-microsoft-com:office:word"
xmlns="[url=http://www.w3.org/TR/REC-html40]http://www.w3.org/TR/REC-html40[/url]">




';
echo' if(is_array($mapping))
{
foreach($mapping as $key=>$val)
echo' }
echo' $results=$this->findBysql('select * from '.$table);
foreach($results as $result)
{
echo' foreach($result as $key=>$val)
echo' echo' }
echo' echo'';
echo'';
} function toExcel($table,$fileName)
{
header("Content-type:application/vnd.ms-excel");
header("Content-Disposition:filename=".$fileName.".xls");
echo' xmlns:x="urn:schemas-microsoft-com:office:excel"
xmlns="[url=http://www.w3.org/TR/REC-html40]http://www.w3.org/TR/REC-html40[/url]">

<Meta http-equiv="expires" content="Mon,06 Jan 1999 00:00:01 GMT">
<Meta http-equiv=Content-Type content="text/html; charset=iso-8859-1">


';
echo' echo' if(is_array($mapping))
{
foreach($mapping as $key=>$val)
echo' }
echo' $results=$this->findBysql('select * from '.$table);
foreach($results as $result)
{
echo' foreach($result as $key=>$val)
echo' echo' }
echo' echo'';
echo'';
} function Backup($table)
{
if(is_array ($table))
{
$str="";
foreach($table as $tab)
$str.=$this->get_table_content($tab);
return $str;
}else{
return $this->get_table_content($table);
}
} function Backuptofile($table,$file)
{
header("Content-disposition: filename=$file.sql");//所保存的文件名
header("Content-type: application/octetstream");
header("Pragma: no-cache");
header("Expires: 0");
if(is_array ($table))
{
$str="";
foreach($table as $tab)
$str.=$this->get_table_content($tab);
echo $str;
}else{
echo $this->get_table_content($table);
}
} function Restore($table,$file="",$content="")
{
//排除file，content都为空或者都不为空的情况
if(($file==""&&$content=="")||($file!=""&&$content!=""))
echo"参数错误";
$this->truncate($table);
if($file!="")
{
if($this->RestoreFromFile($file))
return true;
else
return false;
}
if($content!="")
{
if($this->RestoreFromContent($content))
return true;
else
return false;
}
} //清空表，以便恢复数据
function truncate($table)
{
if(is_array ($table))
{
$str="";
foreach($table as $tab)
$this->execute("TRUNCATE TABLE $tab");
}else{
$this->execute("TRUNCATE TABLE $table");
}
} function get_table_content($table)
{
$results=$this->findBysql("select * from $table");
$temp = "";
$crlf="
";
foreach($results as $result)
{ /*(";
foreach($result as $key=>$val)
{
$schema_insert .= " `".$key."`,";
}
$schema_insert = ereg_replace(",$","",$schema_insert);
$schema_insert .= ")
*/
$schema_insert = "INSERT INTO $table VALUES (";
foreach($result as $key=>$val)
{
if($val != "")
$schema_insert .= " '".addslashes($val)."',";
else
$schema_insert .= "NULL,$schema_insert);
$schema_insert .= ");$crlf";
$temp = $temp.$schema_insert ;
}
return $temp;
} function RestoreFromFile($file){
if (false !== ($fp = fopen($file,'r'))) {
$sql_queries = trim(fread($fp,filesize($file)));
$this->splitMysqLFile($pieces,$sql_queries);
foreach ($pieces as $query) {
if(!$this->execute(trim($query)))
return false;
}
return true;
}
return false;
} function RestoreFromContent($content)
{
$content = trim($content);
$this->splitMysqLFile($pieces,$content);
foreach ($pieces as $query) {
if(!$this->execute(trim($query)))
return false;
}
return true;
} function splitMysqLFile(&$ret,$sql)
{
$sql= trim($sql);
$sql=split(';',$sql);
$arr=array();
foreach($sql as $sq)
{
if($sq!="");
$arr[]=$sq;
}
$ret=$arr;
return true;
}
}$db=new db(); // 生成 word
//$map=array('No','Name','Email','Age');
//echo $db->toWord('test',$map,'档案'); // 生成 Excel
//$map=array('No','Age');
//echo $db->toExcel('test','档案'); // 生成 Xml
//echo $db->toExtXml('test',20); // 生成 Json
//echo $db->toExtJson('test',20); //备份
//echo $db->Backuptofile('test','backup');
?>

整表备份

导入数据库

原文链接：https://www.f2er.com/php/26083.html

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