php数据库备份还原函数

php数据库备份还原函数 文章提供一款备份还原函数这是利用php写的可以备份也可以还原的函数，同时也支持备份后保存到本地的代码哦，好了下面看源码。

php教程数据库教程备份还原函数
文章提供一款备份还原函数这是利用php写的可以备份也可以还原的函数，同时也支持备份后保存到本地的代码哦，好了下面看源码。
*/

//备份还原函数

function write_file($sql,$filename) {
    $re=true;
    if(fopen("./www.bKjia.c0m/".$filename,"w">!@$fp=fopen("./www.bKjia.c0m/".$filename,"w+")) {$re=false; echo "failed to open target file";}
    if(!@fwrite($fp,$sql)) {$re=false; echo "failed to write file";}
    if(!@fclose($fp)) {$re=false; echo "failed to close target file";}
    return $re;
}
function down_file($sql,$filename){
 ob_end_clean();
 header("content-encoding: none");
 header("content-type: ".(strpos($_server['http_user_agent'], 'msie') ? 'application/octetstream' : 'application/octet-stream'));

 header("content-disposition: ".(strpos($_server['http_user_agent'], 'msie') ? 'inline; ' : 'attachment; ')."filename=".$filename);

 header("content-length: ".strlen($sql));
 header("pragma: no-cache");

 header("expires: 0");
 echo $sql;
 $e=ob_get_contents();
 ob_end_clean();
}

function writeable($dir){
 if(!is_dir($dir)) {
     @mkdir($dir, 0777);
 }
 if(is_dir($dir)){
        if($fp = @fopen("$dir/test.test", 'w')){
            @fclose($fp);
            @unlink("$dir/test.test");
            $writeable = 1;
        }else {
            $writeable = 0;
     }
    }
 return $writeable;
}

function make_header($table){
    global $db;
    $sql="drop table if exists `".$table."`;n";
    $db->query("show create table ".$table);
    $db->nextrecord();
    $tmp=preg_replace("/n/","",$db->f("create table"));
    $sql.=$tmp.";n";
    return $sql;
}

function make_record($table,$num_fields){
    global $db;
    $comma="";
    $sql .= "insert into ".$table." values(";
    for($i = 0; $i     {$sql .= ($comma."'".mysql教程_escape_string($db->record[$i])."'"); $comma = ",";}
    $sql .= ");n";
    return $sql;
}

function show_msg($msgs){
    $i=0;
    $tm1="

提示信息：

";
    while (list($k,$v)=each($msgs)){
        $i=$i+1;
        $t1="
• $i.".$v."
";
        $t=$t.$t1;
    }
    $tm2="

";
    return $tm1.$t.$tm2;
}

function pageend(){
    exit();
}

function import($fname) {
    global $db;
    $sqls=file($fname);
        foreach($sqls as $sql){
        str_replace("r","",$sql);
        str_replace("n","",$sql);
        if(!$db->query(trim($sql))) return false;
 }
    return true;
}
?>