(PHP 4, PHP 5, PHP 7)
Examples:
include_once with a case insensitive OS in PHP 4
With PHP 4, _once functionality differs with case-insensitive operating systems (like Windows) so for example:
<?php include_once "a.php"; // this will include a.php include_once "A.php"; // this will include a.php again! (PHP 4 only) ?>
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