On the fly database setup

[eluser]Rob W[/eluser]
Would the following work?

* Distribute the app with some specific values in the DB config ('demo_username' for example)
* Find & replace these values with the new ones
* Save the file

Code:

// Open the db config file - mode = read + write from beginning
$dbconfig_file = fopen('path/to/file', 'r+');
$dbconfig_text = fread($dbconfig_file);
// build arrays for str_replace to use
$find = array('demo_username') // values to find
$replace = array('real_username'); // values to replace, need to be in same position as those in $find
// Make the replacements
$new_dbconfig_text = str_replace($find, $replace, $dbconfig_text);
// rewrite the file
fwrite($dbconfig_file, $new_dbconfig_text);
// Close the handler
fclose($dbconfig_file);

Obviously with better error checking - and you'll need to be very careful about validation on the provided options, otherwise somebody could inject some nasty raw PHP code into your config file.

Hope that helps...

-R