PHP directry functions

dirname to gate name of the directoy and path

$var='https://www.plus2net.com/sql_tutorial/math.php';
echo dirname($var);

https://www.plus2net.com/sql_tutorial

is_dir to check if directory name is true or not

$var='test_dir';
if(is_dir($var)){
echo "This is a directory : $var ";
}else{
echo "This is NOT a directory : $var ";
}