echo php_ini_loaded_file()
Output is True or False and the path is returned if php.ini file is loaded.
$path = php_ini_loaded_file();
if ($path) {
echo 'Path of php.ini: ' . $path;
} else {
echo 'No php.ini file is loaded';
}
Output is
Path of php.ini: C:\php\php.ini
You can get the path of php.ini by using php_info()