We only need to search for N types of database backup class codes on the Internet. Now I will summarize a few good database backups and hope it will be helpful to everyone.
Database backup class
How to use:
The code is as follows |
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代码如下 |
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require_once("backdata.class.php");
$link = @mysql_connect("localhost","数据库名","密码") or die ('Could not connect to server.');
mysql_query("use cms",$link);
mysql_query("set names utf8",$link);
$dbbck = new backupData($link);//实例化它,只要一个链接标识就行了
//备份数据时,如想备份一个数据库中的所有表,你可这样写:
$dbbck->backupTables("cms","./",array('*'));
//备份数据时,如想备份一个数据库中的仅一个表时,你可这样写:
$dbbck->backupTables("cms","./",array('user'));
//备份数据时,如想备份一个数据库中的多个表时,你可这样写:
$dbbck->backupTables("cms","./",array('user','acl','informatoin'));
//注解:$dbbck->backupTables("参1","参2",array());中,
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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());,
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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: Which tables do you want to save
backdata.class.php
The code is as follows |
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/*
*
*A simple Mysql backup data class
*
*/
class backupData{
Private $mysql_link;//Link identification
Private $dbName; //Database name
private $dataDir; //The 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==''){//When the table does not exist
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 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**************
//Search for all data in the table
$rs=mysql_query("select * from $tablename",$this->mysql_link);
//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 = ''; // The 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($array){ //Process the incoming array
foreach($array as $tables){ to ’ ’ to ’ to Receive Table ’s ’ to ’
$newtables=mysql_list_tables($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;
}
}
?>
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