// 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);