php create file if not exists code example

Example 1: php check if file exists

if (!file_exists('http://mysite.com/images/thumbnail_1286954822.jpg')) {   
$filefound = '0';                         
}

Example 2: laravel create new file if not exists

if (!file_exists('somefile.txt')) {
    touch('somefile.txt', strtotime('-1 days'));
}