I'm new to codeigniter and version is 2.1.4, i have problem in export database in sql method. I have given code below, when i run the code it will not show any errors. When i check the given path no files created. Can any one help me. Thanks in advance.
function backup_tables($host='localhost',$user='arts',$pass='arts123',$name='arts',$tables = 'sales')
{
$link = mysql_connect($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);
}
$return = "";
//cycle through
foreach($tables as $table)
{
$result = mysql_query('SELECT * FROM '.$table);
$num_fields = mysql_num_fields($result);
//$return.= 'CREATE TABLE '.$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]);
$row[$j] = preg_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";
}
$backup_file = '/var/www/html/art/assets/uploads/csv/backup-'.date('M').'-'.date('Y').'.sql';
//save file
$handle = fopen($backup_file,'w+');
fwrite($handle,$return);
fclose($handle);
exit;
}
Related
I'm using the script I posted below and it appeared to have worked based on the email and the fact it actually generated the file. However, It didn't backup anything.
Here is the output stored in the file it created:
SET FOREIGN_KEY_CHECKS=0;
SET SQL_MODE="NO_AUTO_VALUE_ON_ZERO";
SET AUTOCOMMIT=0;
START TRANSACTION;
SET FOREIGN_KEY_CHECKS=1;
COMMIT;
Here is the php script being used to generate the backup:
#!/usr/bin/php
<?php
backup_tables();
// backup all tables in db
function backup_tables()
{
$day_of_backup = ''; //possible values: `Monday` `Tuesday` `Wednesday` `Thursday` `Friday` `Saturday` `Sunday`
$backup_path = '/home/user/public_html/path/to/BACKUP.file/destination/'; //make sure it ends with "/"
$db_host = 'localhost';
$db_user = 'root';
$db_pass = 'replace_w_ur_password';
$db_name = 'replace_w_ur_db_name';
//set the correct date for filename
if (date('l') == $day_of_backup) {
$date = date("Y-m-d");
} else {
//set $date to the date when last backup had to occur
$datetime1 = date_create($day_of_backup);
$date = date("Y-m-d", strtotime($day_of_backup.'-1 days'));
}
if (!file_exists($backup_path.$date.'-backup'.'.sql')) {
//connect to db
$link = mysqli_connect($db_host,$db_user,$db_pass);
mysqli_set_charset($link,'utf8');
mysqli_select_db($link,$db_name);
//get all of the tables
$tables = array();
$result = mysqli_query($link, 'SHOW TABLES');
while($row = mysqli_fetch_row($result))
{
$tables[] = $row[0];
}
//disable foreign keys (to avoid errors)
$return = 'SET FOREIGN_KEY_CHECKS=0;' . "\r\n";
$return.= 'SET SQL_MODE="NO_AUTO_VALUE_ON_ZERO";' . "\r\n";
$return.= 'SET AUTOCOMMIT=0;' . "\r\n";
$return.= 'START TRANSACTION;' . "\r\n";
//cycle through
foreach($tables as $table)
{
$result = mysqli_query($link, 'SELECT * FROM '.$table);
$num_fields = mysqli_num_fields($result);
$num_rows = mysqli_num_rows($result);
$i_row = 0;
//$return.= 'DROP TABLE '.$table.';';
$row2 = mysqli_fetch_row(mysqli_query($link,'SHOW CREATE TABLE '.$table));
$return.= "\n\n".$row2[1].";\n\n";
if ($num_rows !== 0) {
$row3 = mysqli_fetch_fields($result);
$return.= 'INSERT INTO '.$table.'( ';
foreach ($row3 as $th)
{
$return.= '`'.$th->name.'`, ';
}
$return = substr($return, 0, -2);
$return.= ' ) VALUES';
for ($i = 0; $i < $num_fields; $i++)
{
while($row = mysqli_fetch_row($result))
{
$return.="\n(";
for($j=0; $j<$num_fields; $j++)
{
$row[$j] = addslashes($row[$j]);
$row[$j] = preg_replace("#\n#","\\n",$row[$j]);
if (isset($row[$j])) { $return.= '"'.$row[$j].'"' ; } else { $return.= '""'; }
if ($j<($num_fields-1)) { $return.= ','; }
}
if (++$i_row == $num_rows) {
$return.= ");"; // last row
} else {
$return.= "),"; // not last row
}
}
}
}
$return.="\n\n\n";
}
// enable foreign keys
$return .= 'SET FOREIGN_KEY_CHECKS=1;' . "\r\n";
$return.= 'COMMIT;';
//set file path
if (!is_dir($backup_path)) {
mkdir($backup_path, 0755, true);
}
//delete old file
//$old_date = date("Y-m-d", strtotime('-4 weeks', strtotime($date)));
//$old_file = $backup_path.$old_date.'-backup'.'.sql';
//if (file_exists($old_file)) unlink($old_file);
//save file
$handle = fopen($backup_path.$date.'-backup'.'.sql','w+');
fwrite($handle,$return);
fclose($handle);
}
}
?>
Any recommendations or leads on why it wouldn't actually backup all the tables would be greatly appreciated.
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?
In this code, enter host, username, password, database or table name in first line : backup_tables('localhost','useranme','password','database_or_table_name');
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($handle);
}
?>
This question already has answers here:
mysql_fetch_array()/mysql_fetch_assoc()/mysql_fetch_row()/mysql_num_rows etc... expects parameter 1 to be resource
(31 answers)
Closed 2 years ago.
I don't know why I recieve this error.
Here is what my code looks like:
<?php ini_set('memory_limit', '1000M'); set_time_limit(0);
backup_tables('host','dbuser','password','dbname','dbtable');
function backup_tables($host,$user,$pass,$name,$tables = '*')
{
$link = mysql_connect($host,$user,$pass);
mysql_select_db($name,$link);
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);
}
foreach($tables as $table) {
$result = mysql_query('SELECT * FROM '.$table);
$num_fields = mysql_num_fields($result);
$row2 = mysql_fetch_row(mysql_query('SHOW CREATE TABLE '.$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] = preg_replace("/\n/i", "\\n",$row[$j]);;
if (isset($row[$j])) {
$return.= '"'.$row[$j].'"' ;
} else {
$return.= '""';
}
if ($j<($num_fields-1)) {
$return.= ',';
}
}
$return.= ");\n";
}
}
$return.="\n\n\n";
}
$handle = fopen('db-backup-'.time().'-'.(md5(implode(',',$tables))).'.sql','w+');
fwrite($handle,$return); fclose($handle);
} ?>
firstly, all your code on one line makes it awfully hard to help you debug.
secondly check $result before passing it to mysql_num_fields you'll find its false because the query failed.
check here for more info on a similar problem thats explained in a better way
Change to this it might work :
$result = mysql_query('SELECT * FROM `$table`');
I tried this following code to backup mysql database into file and it works perfectly create the .sql file I need.
function backup_tables()
{
$host='localhost';
$user='root';
$pass='';
$name='evote';
$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
foreach($tables as $table)
{
$result = mysql_query('SELECT * FROM '.$table);
$num_fields = mysql_num_fields($result);
$return.= 'DROP TABLE '.$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] = str_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
$sql_name='db-backup.sql';
$handle = fopen($sql_name,'w+');
fwrite($handle,$return);
fclose($handle);
return $sql_name;
}
but it shows the error code :
A PHP Error was encountered
Severity: Notice
Message: Undefined variable: return
Filename: models/vote_m.php
can somebody tell me how to fix this?
The first time you reach this line;
$return.= 'DROP TABLE '.$table.';';
...$return has no value to append to. To get rid of the warning, you'll need to initialize $return (to an empty string probably) before starting the loop.
I am trying to perform php/mysql backups
I receive values from a form page and then with the command "select tables", i save those values in a array.
After that i do a "for" loop to backup each table:
<?php
$dbname = $_POST['txt_db_name'];
$tbname = $_POST['txt_tb_name'];
$ligacao=mysql_connect('localhost','root','')
or die ('Problemas na ligação ao Servidor de MySQL');
$res = mysql_query("SHOW TABLES FROM pessoal");
$tables = array();
mysql_select_db($dbname,$ligacao);
while($row = mysql_fetch_array($res, MYSQL_NUM)) {
$tables[] = "$row[0]";
}
$length = count($tables);
for ($i = 0; $i < $length; $i++) {
$query=
"SELECT * INTO OUTFILE 'pessoa_Out.txt'".
"FIELDS TERMINATED BY ',' ".
"ENCLOSED BY '\"'".
"LINES TERMINATED BY '#'".
"FROM $tables[$i]";
$resultado = mysql_query($query,$ligacao);
}
mysql_close();
if ($resultado)
$msg ='Sucesso na Exportaçao da Database '.$dbname.' ';
else
$msg ='Erro Impossivel Exportar a Database '.$tbname.' ';
?>
Don't do this — you are re-inventing existing tools!
Invoke mysqldump instead, which is expressly designed for the purpose.
With the proper permissions, you can use PHP's system or exec to invoke this.
First, I agree with the ones saying that mysqldump should be used for this. But basing on your comment that you just need it to be done with php/mysql for educational (or whatever) purposes, here is the script (yep, it re-invents the wheel). Note that you should create a backup directory in the folder where you upload this and allow web server to write to it :
<?php
error_reporting(E_ALL);
ini_set('display_errors',1);
ini_set('memory_limit','1500M');
set_time_limit(0);
backup_tables('localhost','user','xxxxxxx','xxxxxxxxxx');
/* backup the db OR just a table */
function backup_tables($host,$user,$pass,$name,$tables = '*')
{
//save file
$handle = gzopen(getcwd() . DIRECTORY_SEPARATOR . 'backup' . DIRECTORY_SEPARATOR . 'db-backup-'.time().'.sql.gz','w9');
$link = mysql_connect($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
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";
gzwrite($handle,$return);
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] = str_replace("\n","\\n",$row[$j]);
if (isset($row[$j])) { $return.= '"'.$row[$j].'"' ; } else { $return.= '""'; }
if ($j<($num_fields-1)) { $return.= ','; }
}
$return.= ");\n";
gzwrite($handle,$return);
}
}
$return ="\n\n\n";
gzwrite($handle,$return);
}
gzclose($handle);
}