Question

How do I preg_replace .php from end of string?

for ($x = 0; $x < count($sidebar_links); $x++) {

   $sidebar[$x] = $x;           
}

$sidebar_links:

array(3) { [0]=>  string(9) "index.php" [1]=>  string(9) "site2.php" [2]=>  string(7) "site3.php" } 

Answer 1

you can use simple str_replace

like

str_replace('.php', '', $sidebar_links[$x]);

or basename

basename($sidebar_links[$x], ".php");