foreach ($problems as $problem) {
    $this->solve($problem) || $this->execute(self::SHOOT);
}

To make the situation a little more worrying ;)

Do I die() after I shoot myself?

that should be placed inside a recursive function.
all problems shoud be solved

@narven Nope. Iteration into infinity.

lol

love this !

@mauris lol

@mauris no, you will just exit; life and continue to cemetery :)

You forgot something!

foreach ($problems as $problem) {
    $problemSolved = $this->solve($problem);
    if (!$problemSolved) {
        $this->execute(self::SHOOT);
    }
    $problems[] = new Problem();
}