Newline In String Question

[another_noob]

I am creating a basic application framework just for a challenging project. Things are going good except for this silly problem:

function make_mysqli_connection_file($db_host,$db_user,$db_pass,$db_name){
	$mysqli_connect_file = fopen("includes/mysqli_connect.inc.php", "w") or die("Unable to open file!");
	$conn_string = '<?php $dbc = mysqli_connect ("' . $db_host . '", "' . $db_user . '", "' . $db_pass . '", "' . $db_name . '") OR die("Could not connect to MySql: " . mysqli_connect_error() );';
	fwrite($mysqli_connect_file, $conn_string);
	fclose($mysqli_connect_file);
}

This function will create an "includes" directory and a "mysqli_connect.inc.php" file with the standard connection string, it works as expected. The problem is that I want a newline after the opening php tag. I have tried double quoting the string, single quoting and all the necessary concatenation combinations necessary to keep the variables correct. The current output of the function is this:

<?php $dbc = mysqli_connect ("localhost", "root", "", "database_test") OR die("Could not connect to MySql: " . mysqli_connect_error() );

And what I want is this:

<?php 
$dbc = mysqli_connect ("localhost", "root", "", "database_test") OR die("Could not connect to MySql: " . mysqli_connect_error() );

It seems so simple, but the solution is eluding me. If I can get this solved I can move forward on other parts of this script.

 

Thanks for any advice!

[HartleySan]

Use double quotes and then after the "<?php" part, write "\r\n".

[another_noob]

Thanks HartleySan for the reply. I got it to work with a variation of your suggestion. Before I posted for help, I did try exactly what you suggested, I got a newline, but I would get a "undefined variable $dbc" notice and $dbc would be blank in the generated string.

 

I had to initialize $dbc to a string literal '$dbc' for it to show up as a variable in the generated string.

 

Like this:

function make_mysqli_connection_file($db_host,$db_user,$db_pass,$db_name){
    $dbc='$dbc'; 
    $mysqli_connect_file = fopen("includes/mysqli_connect.inc.php", "w") or die("Unable to open file!");
    $conn_string = "<?php \r\n $dbc = mysqli_connect ('" . $db_host . "', '" . $db_user . "', '" .$db_pass . "', '" . $db_name . "') OR die('Could not connect to MySql: ' . mysqli_connect_error() )";
    fwrite($mysqli_connect_file, $conn_string);
    fclose($mysqli_connect_file);
}

Now I get the output I need in my auto generated connection script. This is a fun little project that I have become obsessed with...too much time on my hands I guess. Oh well, even if it goes nowhere, I learned a lot.

 

Thanks again.  

[HartleySan]

Yes, if you use double quotes for the entire string, then you must do that, yes.

Personally, I prefer to use single quotes for everything but the newline characters, and then switch to double quotes for just those.

 

Either way though, you can solve your problem.