php eval
// Our PHP code inside a variable $phpCode = ' class Foo { private $name; public function __construct($name) { $this->name = $name; } public function hello() { return $this->name; } } $serializedOutput = null; foreach (range(1, 100000) as $i) { $object = new Foo("name" . $i); $out[] = $object->hello(); } $serializedOutput = serialize($out); '; // end of variable function fakeEval($phpCode) { $tmpfname = tempnam("/tmp", "fakeEval"); $handle = fopen($tmpfname, "w+"); fwrite($handle, "<?php\n" . $phpCode); fclose($handle); include $tmpfname; unlink($tmpfname); return get_defined_vars(); } extract(fakeEval($phpCode)); echo strlen($serializedOutput);