PHP Increment a counting variable in a text file

Question

This seems simple but I can\'t figure it out.

file_get_contents(\'count.txt\');
$variable_from_file++;
file_put_contents(\'count.txt\', $variable_from_file);         


        

Answer 1

$variable_from_file = (int)file_get_contents('count.txt');

But notice that this is not thread-safe.