logging object/array/variable dumps to a file in PHP

log_to_file.php

<?php 
function log_to_file($text) {
  $f = fopen('/tmp/my_log.txt', 'a');
  fwrite($f, date('Ymd H:i:s - ') . $text . "\n");
  fclose($f);
}

// to print arrays/objects use
// log_to_file(print_r($obj, $return = TRUE));