php.ini

zend_extension=opcache.so
opcache.enable=1
opcache.enable_cli=1
extension=parallel.so
opcache.preload=preloaded.php

preloaded.php

<?php
echo "Executing Preloader".PHP_EOL;
class a
{
    public static $b="foo";
    public $c="bar";
    public static function getB()
    {
        return self::$b;
    }
}

test.php

<?php
parallel\run(function(){
    var_dump(a::$b); // returns correct value, but segfaults at end of program
    var_dump(a::getB()); // returns correct value, but segfaults at end of program
    $a = new a; // does not segfault
    var_dump($a->c); // returns correct value, does not segfault
});