如何在php中备份数据库? [英] How to take backup of database in php?

问题描述

我正在做一些与金融相关的项目，为此我正在使用 mysql 数据库.有人可以建议我如何在每次操作后备份数据库吗?

I am doing some projects related to finance and for that i am using mysql database.Can any one suggest me how to take backup of database after each operation?

推荐答案

在这段代码中，在第一行输入主机、用户名、密码、数据库或表名: backup_tables('localhost','useranme','密码','database_or_table_name');

In this code, enter host, username, password, database or table name in first line : backup_tables('localhost','useranme','password','database_or_table_name');

您将在 htdocs 中得到一个名为 db-backup....... 的文件.这对我有用.试试这个代码:

You will get a file named db-backup....... in htdocs. This works for me. Try This code:

<?php

// Enter database name here

backup_tables('localhost','useranme','password','database_or_table_name');

/* backup the db OR just a table */
function backup_tables($host,$user,$pass,$name,$tables = '*')
{

    $link = mysql_connect($host,$user,$pass);
    mysql_select_db($name,$link);

    //get all of the tables
    if($tables == '*')
    {
        $tables = array();
        $result = mysql_query('SHOW TABLES');
        while($row = mysql_fetch_row($result))
        {
            $tables[] = $row[0];
        }
    }
    else
    {
        $tables = is_array($tables) ? $tables : explode(',',$tables);
    }

    //cycle through
    $return = "";
    foreach($tables as $table)
    {
        $result = mysql_query('SELECT * FROM '.$table);
        $num_fields = mysql_num_fields($result);

        $return.= 'DROP TABLE IF EXISTS '.$table.';';
        $row2 = mysql_fetch_row(mysql_query('SHOW CREATE TABLE '.$table));
        $return.= "\n\n".$row2[1].";\n\n";

        for ($i = 0; $i < $num_fields; $i++) 
        {
            while($row = mysql_fetch_row($result))
            {
                $return.= 'INSERT INTO '.$table.' VALUES(';
                for($j=0; $j < $num_fields; $j++) 
                {
                    $row[$j] = addslashes($row[$j]);
                    $row[$j] = ereg_replace("\n","\\n",$row[$j]);
                    if (isset($row[$j])) { $return.= '"'.$row[$j].'"' ; } else { $return.= '""'; }
                    if ($j < ($num_fields-1)) { $return.= ','; }
                }
                $return.= ");\n";
            }
        }
        $return.="\n\n\n";
    }

    //save file
    $handle = fopen('db-backup-'.time().'-'.(md5(implode(',',$tables))).'.sql','w+');
    fwrite($handle,$return);
    fclose($handle);
}

?>

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