PHPCfg\Parser::readVariableRecursive PHP Method

    private function readVariableRecursive($name, Block $block)
    {
        if ($this->ctx->complete) {
            if (count($block->parents) === 1 && !$block->parents[0]->dead) {
                // Special case, just return the read var
                return $this->readVariableName($name, $block->parents[0]);
            }
            $var = new Operand\Temporary(new Variable(new Literal($name)));
            $phi = new Op\Phi($var, ["block" => $block]);
            $block->phi[] = $phi;
            // Prevent unbound recursion
            $this->writeVariableName($name, $var, $block);
            foreach ($block->parents as $parent) {
                if ($parent->dead) {
                    continue;
                }
                $phi->addOperand($this->readVariableName($name, $parent));
            }
            return $var;
        }
        $var = new Operand\Temporary(new Variable(new Literal($name)));
        $phi = new Op\Phi($var, ["block" => $block]);
        $this->ctx->addToIncompletePhis($block, $name, $phi);
        $this->writeVariableName($name, $var, $block);
        return $var;
    }