PHP code to back up mysql database (one table, one file)_PHP tutorial

Copy code The code is as follows:

$cfg_dbhost ='localhost';//mysql host
$cfg_dbname ='sq_test';//Database name
$cfg_dbuser ='root';//Database user name
$cfg_dbpwd ='jb51.net';//Database user password
$cfg_db_language =' utf8';//Database encoding

class dbmysql{
public static $dbhost = 'localhost';
public static $dbname;
public static $dbuser = 'root';
public static $dbpass;
public static $charset = 'utf8';
public static $DB = null;
public $querycount = 0;

public function __construct()
{
self::$dbhost = $GLOBALS['cfg_dbhost'];
self::$dbname = $GLOBALS['cfg_dbname'];
self::$dbuser = $GLOBALS['cfg_dbuser '];
self::$dbpass = $GLOBALS['cfg_dbpwd'];
self::$charset= $GLOBALS['cfg_db_language'];
self::connect();
}
public function connect(){
self::$DB=mysql_connect(self::$dbhost,self::$dbuser,self::$dbpass);
if(!self::$ DB){
self::sqlError('Unable to connect to the server!'.self::mysqlerror);exit("Unable to connect to the server!");;
}
if(!mysql_select_db(self:: $dbname)){
self::sqlError('Unable to connect to database ('.self::$dbname.')!'.self::mysqlerror);exit("Unable to connect to database!");
}
mysql_query("SET NAMES '".self::$charset."', character_set_client=binary, sql_mode='';",self::$DB);
}

private function mysqlerror(){
return mysql_error();
}

public function getTablesName(){
$res = mysql_query('SHOW TABLES FROM '.self::$dbname,self ::$DB);
$tables=array();
while ($row=mysql_fetch_row($res))$tables[]=$row[0];
mysql_free_result($res);
return $tables;
}
public function getFields($table){
$res=mysql_query('DESCRIBE '.$table,self::$DB);
$tables= array();
while($row=mysql_fetch_row($res))$tables[]=$row[0];
mysql_free_result($res);
return $tables;
}

public function fetch_array($sql){
$res=mysql_query($sql,self::$DB);
$r=mysql_fetch_array($res);
mysql_free_result($res );
return $r;
}

public function fetch_assoc($sql){
$q3=mysql_query($sql,self::$DB); $ra=array( );
while($data=mysql_fetch_assoc($q3)){
$ra[]=$data;
}
mysql_free_result($q3);
return $ra;
}
private function sqlError($message='',$info ='',$sql=''){//Save error message to file
echo "{".$message."
DATE: ".date('Y-n-j H:i:s')."
ERROR: ".$info."
SQL: ".$sql."< br/>}
";
}
public function close(){
self::$DB =null;
}
public function __destruct()
{
self::close();
}
}

/*---class end*/

function makedir($dirpath){
if(!$dirpath) return 0;
$dirpath=str_replace("\","/",$dirpath); $mdir="";
foreach(explode("/",$dirpath ) as $val){
$mdir.=$val."/";
if($val==".."||$val==".")continue;
if( !is_dir($mdir)&&!file_exists($mdir)){
if(!@mkdir($mdir,0755)){
exit("Failed to create directory [".$mdir."]." );
}
}
}
return true;
}

function delDirAndFile($dirName){
if($handle=opendir($dirName) ){
while(false!==($item = readdir($handle))){
if($item !="."&&$item!=".."){
if (is_dir( "$dirName/$item")){
delDirAndFile( "$dirName/$item");
}else{ unlink("$dirName/$item"); }
}
}
closedir( $handle );
if( rmdir( $dirName ) )echo "Directory deleted successfully: $dirName
n";
}
}

function filein($filename="databak/",$table='',$mysql=''){
$fp = fopen($filename.'/'.$table.'.sql', 'w');
fputs($fp,$mysql);
fclose($fp);
}

header("Content-Type:text/html;charset=utf -8");

$db=new dbmysql();

$table=$db->getTablesName();

$filename="databak/" .date("Ymd");
$url=getcwd()."/databak/";
$handle = opendir($url);
while(false!==($file = readdir ($handle))){
if ($file!="."&&$file!=".."&&is_dir($url."/".$file)) {
if(date(" Ymd")-$file>5){delDirAndFile($url."/".$file);};
}
}

makedir($filename);
foreach( $table as $t){
$s1=$db->fetch_array("show create table `$t`");
$mysql="/*Time:".date("Y-m-d H: i:s")." */rnDROP TABLE IF EXISTS `$t`;rn".$s1['Create Table'].";rnrn";
$a1=$db->fetch_assoc("select * from `$t`");
foreach ($a1 as $data){
$vals=array_values($data);
$vals=array_map('addslashes',$vals);
$vals=join("','",$vals);
$vals="'".$vals."'";
$mysql.="INSERT INTO `$t` VALUES ( $vals);rn";
}
$mysql.="rn";
filein($filename,$t,$mysql);
}

echo "data The backup is successful and the backup file ".getcwd()."/".$filename."/
The program automatically cleans the backups from 5 days ago";
?>

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