php MYSQL data backup class_PHP tutorial-PHP Tutorial-php.cn

php MYSQL data backup class_PHP tutorial

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Release： 2016-07-21 15:46:12

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Functionally:
require_once("backdata.class.php");
$link = @mysql_connect("localhost","database name","password") or die ('Could not connect to server. ');
mysql_query("use cms",$link);
mysql_query("set names utf8",$link);
$dbbck=new backupData($link);//instantiate it , just a link identifier is enough
//When backing up data, if you want to back up all tables in a database, you can write like this:
$dbbck->backupTables("cms","./", array('*'));

//When backing up data, if you want to back up only one table in a database, you can write like this:
$dbbck->backupTables("cms" ,"./",array('user'));

//When backing up data, if you want to back up multiple tables in a database, you can write like this:

$ dbbck->backupTables("cms","./",array('user','acl','informatoin'));
//Note: $dbbck->backupTables("parameter 1", "Parameter 2", array());,
Parameter 1 is: database name,
Parameter 2 is: the location where the backup data is to be stored (i.e. directory address)
The third one is: you want Save those tables
ok...

The following is the code:

Copy the code The code is as follows:

/* 
* 
*A simple backup data class
*author FC 
* 
*/ 
class backupData{ 
private $mysql_link;//Link identification
private $dbName;//Database name
private $dataDir; //Directory where the data is to be stored
private $tableNames;//Table name
public function __construct( $mysql_link){ 
 
$this->mysql_link = $mysql_link; 
} 
 
public function backupTables($dbName,$dataDir,$tableNames){//Start backup
 
$this->dbName = $dbName; 
$this->dataDir = $dataDir; 
$this->tableNames = $tableNames; 
$tables=$this-> ;delarray($this->tableNames); 
$sqls=''; 
foreach($tables as $tablename){ 
if($tablename==''){//The table does not exist When 
continue; 
} 
//**********************The following is the first half of the SQL**** ********** 
//If the table exists, delete it first 
$sqls .= "DROP TABLE IF EXISTS $tablename;n"; 
//Read the table structure
$rs = mysql_query("SHOW CREATE TABLE $tablename",$this->mysql_link); 
$row=mysql_fetch_row($rs); 
//Get the table structure to form SQL 
$sqls .=$row['1'].";nn"; 
unset($rs); 
unset($row); 
//************ ************The following is the second half of the SQL************** 
//Find all the data in the table
$ rs=mysql_query("select * from $tablename",$this->mysql_link); 
//The number of fields in the table
$field=mysql_num_fields($rs); 
//Form this SQL statement: "INSERT INTO `groups` VALUES('1499e0ca25988d','Director','','0');" 
while($rows=mysql_fetch_row($rs)){ 
$comma=' ';//Comma
$sqls.="INSERT INTO `$tablename` VALUES("; 
for($i=0;$i<$field;$i++){ 
$sqls.= $comma."'".$rows[$i]."'"; 
$comma=','; 
} 
$sqls.=");nnn"; 
} 
} 
$backfilepath=$this->dataDir.date("Ymdhis",time()).'.sql'; 
//Write file
$filehandle = fopen($backfilepath , "w"); 
fwrite($filehandle, $sqls); 
fclose($filehandle); 
} 
 
private function delarray($array){//process incoming Incoming array
foreach($array as $tables){ 
if($tables=='*'){//All tables (when obtaining the table name, you cannot form an array in the usual way) 
$newtables=mysql_list_tables($this->dbName,$this->mysql_link); 
$tableList = array(); 
for ($i = 0; $i < mysql_numrows($newtables) ; $i++){ 
array_push($tableList,mysql_tablename($newtables, $i)); 
} 
$tableList=$tableList; 
}else{ 
$tableList=$array ; 
break; 
} 
} 
return $tableList; 
} 
} 