PHP export .sql file/mysql database backup program_PHP tutorial

php tutorial export .sql file/mysql tutorial database tutorial backup program

$database='';//Database name
$options=array(
'hostname' => '',//ip address
'charset' => 'utf8',//encoding
'filename' => $database.'.sql',//File name
'username' => '',
'password' => ''
);
mysql_connect($options['hostname'],$options['username'],$options['password'])or die("Cannot connect to database!");
mysql_select_db($database) or die("Wrong database name!");
mysql_query("SET NAMES '{$options['charset']}'");
$tables = list_tables($database);
$filename = sprintf($options['filename'],$database);
$fp = fopen($filename, 'w');
foreach ($tables as $table) {
​ dump_table($table, $fp);
}
fclose($fp);
//Download sql file
$file_name=$options['filename'];
Header("Content-type:application/octet-stream");
Header("Content-Disposition:attachment;filename=".$file_name);
readfile($file_name);
//Delete the sql file on the server
unlink($file_name);
exit;
//Get the name of the table
function list_tables($database)
{
$rs = mysql_list_tables($database);
$tables = array();
While ($row = mysql_fetch_row($rs)) {
          $tables[] = $row[0];
}
Mysql_free_result($rs);
Return $tables;
}
//Export database
function dump_table($table, $fp = null)
{
$need_close = false;
If (is_null($fp)) {
           $fp = fopen($table . '.sql', 'w');
         $need_close = true;
}
$a=mysql_query("show create table `{$table}`");
$row=mysql_fetch_assoc($a);fwrite($fp,$row['Create Table'].';');//Export table structure
$rs = mysql_query("SELECT * FROM `{$table}`");
While ($row = mysql_fetch_row($rs)) {
            fwrite($fp, get_insert_sql($table, $row));
}
Mysql_free_result($rs);
If ($need_close) {
            fclose($fp);
}
}
//Export table data
function get_insert_sql($table, $row)
{
$sql = "INSERT INTO `{$table}` VALUES (";
$values ​​= array();
foreach ($row as $value) {
          $values[] = "'" . mysql_real_escape_string($value) . "'";
}
$sql .= implode(', ', $values) . ");";
Return $sql;
}?>