如何使用php中的备份文件解决此问题
我已经经历过大约两次mysql数据库崩溃,它无法连接很长一段时间,我总是要联系托管服务重新激活它…出于某种原因。所以我想创建一种机制来解决备份文件的问题。代码如下:如何使用php中的备份文件解决此问题,php,sql,select,backup,Php,Sql,Select,Backup,我已经经历过大约两次mysql数据库崩溃,它无法连接很长一段时间,我总是要联系托管服务重新激活它…出于某种原因。所以我想创建一种机制来解决备份文件的问题。代码如下: <?php $query = //some source $db_user = "data_search"; $db_password = "password"; $database = "data_search"; $backupfile = '/data_search.sql'; $db_table = "words"
<?php
$query = //some source
$db_user = "data_search";
$db_password = "password";
$database = "data_search";
$backupfile = '/data_search.sql';
$db_table = "words";
$db = mysql_connect($hostname, $db_user, $db_password);
mysql_select_db($database,$db);
mysql_query("set names 'utf8'");
if ($db) {
$result = mysql_query("
SELECT
*
FROM
$db_table
WHERE
word = '$query'
LIMIT
0 , 1
");
} else {
$result = mysql_query("
LOAD DATA INFILE
'$backupfile'
FROM
'$db_table'
WHERE
word = '$query'
LIMIT
0 , 1
");
}
$num = mysql_numrows($result);
$i = 0;
while ($i < $num) {
$word = mysql_result($result,$i,"word");
echo $word;
$i++;
}
您可以使用(它与mysqldump不同!)您可以对其进行编程,通过FTP或每封电子邮件传输DBs,这样在服务器完全崩溃时它们就不会丢失 改用mysqldump
。您可以从PHP开始:
/* get mysql database as gzipped backup file;
* be aware, that the DB-password is stored in the ~/.bash_history,
* if you include it in the program-call;
*/
shell_exec('mysqldump --host=DB_HOST --user=DB_USER --password=DB_PASSWORD --databases DB_NAME --skip-triggers --compact --no-create-info | gzip -9 > BACKUP_FILENAME-`date +%Y-%m-%d_%Hh%Mm%Ss`.sql.gz')
或者通过shell脚本执行此操作:
# !/bin/bash
REMOTE_DB_USER="my-database-user"
REMOTE_DB_PASSWORD="my-database-password"
REMOTE_DATABASE="my-database-name"
LOCAL_BACKUP_DIRECTORY="~/backup/dumps"
CURRENT_TIMESTAMP=`date +%Y-%m-%d_%Hh%Mm%Ss`
# switch to local backup directory
echo "change dir";
cd $LOCAL_BACKUP_DIRECTORY
# dump whole remote database to gzipped file
echo "dump db to local"
/usr/bin/mysqldump --user=$REMOTE_DB_USER --password=$REMOTE_DB_PASSWORD --host=127.0.0.1 --port=3306 $REMOTE_DATABASE | gzip -9 > dump-$CURRENT_TIMESTAMP.sql.gz
echo "finished"
我还建议您使用mysqldump,但如果您有shell访问权限,我建议您直接使用mysqldump,而不必处理php超时和内存问题
例如,如果您希望进行定期备份,那么您应该通过运行bash脚本的cron进行备份
如果我们知道此脚本的使用案例,这将有所帮助。请改用mysqldump。