php – 一次更改多个mysql数据库(SAAS数据库更改)

我还让它在应用更改之前备份每个数据库.备份部分现在特定于Linux / Unix,但可以调整以适用于其他操作系统.

目前它非常冗长,因此您可以根据需要进行更改.您还可以更改行终止符,具体取决于您是从CLI还是浏览器运行它.我建议将它放在您的脚本目录中并从CLI运行它.

如果您需要其他任何内容或者这对您不起作用,请告诉我.

<?php
// Configure these as needed
$db_host = 'localhost';
$db_user = 'user';
$db_pass = 'password';

$datetime_pattern       = date('Ymd.His');
$backup_file_path       = "/path/to/db_backups/$datetime_pattern/";
$backup_file_format     = "db_backup.%s.sql";
$backup_syntax_pattern  = "/usr/bin/mysqldump --host=%s --user=%s --password=%s --opt %s > $backup_file_path/db_backup.%s.sql";
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!
// CHANGE THE PERMISSIONS!!!!!!
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!
$backup_file_permission = 0777;

// Choose how to terminate your lines
$line_end = "n";      // Use for CLI
//$line_end = "<br/>";   // Use for browser

// Match words that begin with 'user',case-insensitive
$pattern = '/^user/i';

// What changes will we be applying?
$db_update_syntax = array("ALTER TABLE foo ADD baz1 VARCHAR(30) AFTER bar1","ALTER TABLE foo ADD baz2 VARCHAR(30) AFTER bar2","ALTER TABLE foo ADD baz3 VARCHAR(30) AFTER bar3",);

// END OF CONFIGURATION
/////////////////////////////////////////////////////////////


// Create the database backup directory
if (!mkdir($backup_file_path,$backup_file_permission,true)) {
    die('Failed to create backup directory...');
}

// Connecting to MySQL.
$conn = @mysql_connect($db_host,$db_user,$db_pass)
        or die('Not connected : ' . mysql_errno() . ': ' . mysql_error());

$db_list = mysql_list_dbs($conn);

echo "{$line_end}Starting Database Update.{$line_end}";
while ($row = mysql_fetch_assoc($db_list)) {
    $db_name = $row['Database'];
    if (preg_match($pattern,$db_name)) {
        echo "{$line_end}A match was found: [$db_name]{$line_end}";
        echo "Backing up the database{$line_end}";
        // Backup the database
        $backup_syntax = sprintf($backup_syntax_pattern,$db_host,$db_pass,$db_name,$db_name);
        exec($backup_syntax);
        $db_selected = mysql_select_db($db_name,$conn)
                       or die("Can't use [$db_name] : " . mysql_error());

        foreach ($db_update_syntax as $each_update_syntax) {
            echo "Altering using: [$alter_syntax]{$line_end}";
            $update_status = mysql_query($alter_syntax);
            if ($update_status) {
                echo "Success!{$line_end}{$line_end}";
            } else {
                echo "Unable to update [$db_name] : " . mysql_error() . "{$line_end}{$line_end}";
            }
        }
    } else {
        echo "Ignoring: [$db_name]{$line_end}";
    }
}
echo "Finished!{$line_end}";
// Free resources / Close MySQL Connection
mysql_free_result($db_list);
mysql_close($conn);