just_for_fun_with.php

<?php

class WithFileContents {
  private $resource = null;

  private function open($f) {
    $this->resource = fopen($f, "r");
  }

  public function run($resource, $fun) {
    if(is_callable($fun)) {
      $this->open($resource);
      $contents = fread($this->resource, filesize($resource));
      $fun($contents);
      $this->close();
    }
  }

  private function close() {
    fclose($this->resource);
  }
}

$f = function ($c) {
  printf("%s", $c);
};


$with = new WithFileContents ();
$with->run("withPattern.php", $f);