rtrim function doesn't work with ending h letter

Question

$file = \"refinish.php\";
$folder = rtrim($file, \".php\");
echo $folder; // refinis

where is ending h ?

I tried with some other

Answer 1

rtrim's second argument is not the substring to remove but a set of characters—could also be a range. You can use preg_replace if you want to make sure only the trailing .php is removed. e.g.,

preg_replace("/\.php$/", "", "refinish.php")