php database content is saved as an array of files

The contents of the database tutorial to save the file in an array Here to save the commonly used content in the database to a standard php format file, it is also more convenient to use, the following code.
* /
$ res = mysql tutorial _query ("select k1, k2 from" .table ('keywords'). "");
$ str = "<? php rn";
while ($ rs = mysql_fetch_array ($ res))
{

$ rss [0]. "'] ='". $ rs [1]. "'; rn";
}
$ str. = "?>";
file_put_contents ("keyword.php", $ str);
echo "export success";

//Method Two

$ f = file_get_contents ("w1.txt");
$ f = str_replace ("rn", "<br>", $ f); // Replace line breaks
$ arr = explode ("<br>", $ f);
$ str = "<? php rn";
foreach ($ arr as $ t)
{
$ rs = explode ("|", $ t);
// can not contain? Other special symbols
$ str. = "$ keyword ['". str_replace ("?", "", $ rs [0]).' ']' '' '. str_replace ("?", "", $ rs [1]). "'; rn";

}
$ str. = "?>";
file_put_contents ("keyword.php", $ str);
echo "export success";

//conn.php file
$ conn = mysql_connect ($ mysql_host, $ mysql_user, $ mysql_password) or die ('Connection Server Error');
mysql_select_db ($ mysql_db) or die ("Select database error");
mysql_query ("set names 'gbk'");
function table ($ t)
{
global $ mysql_table_prefix;
return $ mysql_table_prefix. $ t;
}
?>