How to implement database backup in php (code)

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public function dataBackup(){ $doc_root=$_SERVER['DOCUMENT_ROOT']; $file_path_name=$doc_root.'/sqlbackup';　　//保存到的路径 $name='backup_'.date('YmdHis').".sql"; if(!file_exists($file_path_name)){ mkdir($file_path_name,0777); } $mysqldump_url='G:\phpstudy\PHPTutorial\MySQL\bin\mysqldump.exe';//mysqldump.exe的绝对路径，安装mysql自带的有，可以搜索一下路径 $host='127.0.0.1';//数据库所在的服务器地址 $User='root';//数据库用户名 $Password='root';//数据库密码 $databaseName='kuer';//数据库名 $process=$mysqldump_url." -h".$host." -u".$User." -p".$Password." ".$databaseName." >".$file_path_name."/".$name; $er=system($process);//system()执行外部程序，并且显示输出 if($er!==false){ echo json_encode('success!'); }else{ echo json_encode('error!'); } }

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