include ('classes/config.php');
include_once ('classes/config.php');
require ('classes/config.php');
require_once ('classes/config.php');

Included Files Corrupting Things

Whitespace before or after the php start and end markers

White space or any characters before or after the <?php and ?> will be output in the same way as echo(as html) in an included file. This can be a problem, for instance having a line break after the ?> and the file being included before say the start of say an echo'd xml output will corrupt the xml output as a valid xml document requires the first line XML definition at the top of the file before any line break.

Feel free to comment if you can add help to this page or point out issues and solutions you have found. I do not provide support on this site, if you need help with a problem head over to stack overflow.

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