readline.php

<?php

if (php_sapi_name() == "cli") {
  $HISTORY_FILE = $_SERVER['HOME'] . "/.mal-history";
  function mal_readline($prompt) {
      global $HISTORY_FILE;
      static $history_loaded = false;

      // Load the history file
      if (! $history_loaded) {
          $history_loaded = true;
          if (is_readable($HISTORY_FILE)) {
              if ($file = fopen($HISTORY_FILE, "r")) {
                  while (!feof($file)) {
                      $line = fgets($file);
                      if ($line) { readline_add_history($line); }
                  }
                  fclose($file);
              }
          }
      }

      $line = readline($prompt);
      if ($line === false) { return NULL; }
      readline_add_history($line);

      // Append to the history file
      if (is_writable($HISTORY_FILE)) {
          if ($file = fopen($HISTORY_FILE, "a")) {
              fputs($file, $line . "\n");
              fclose($file);
          }
      }

      return $line;
  }
} else {
  function mal_readline($prompt) {}
}

?>