Problem with 0 executed statements

[koupisbean]

Hello, I have discovered probably a problem.

Im using Laravel DebuBar and when I want to register TraceablePDO class to track all PDO queries and run 0 queries, it gives error with return type.

Register (in Laravel ServiceProvider):

$pdo = new TraceablePDO(DB::getPdo());
app('debugbar')->addCollector(new PDOCollector($pdo));

DB::setPdo($pdo);

Error:

DebugBar\DataCollector\PDO\TraceablePDO::getAccumulatedStatementsDuration(): Return value must be of type float, null returned

After preventing from returning null, it works as it should.

Fix (in DebugBar\DataCollector\PDO\TraceablePDO):

    /**
     * Returns the accumulated execution time of statements
     *
     * @return float
     */
    public function getAccumulatedStatementsDuration() : float
    {
        return array_reduce($this->executedStatements, function ($v, $s) { return $v + $s->getDuration(); }) ?? 0;
    }

    /**
     * Returns the peak memory usage while performing statements
     *
     * @return int
     */
    public function getMemoryUsage() : int
    {
        return array_reduce($this->executedStatements, function ($v, $s) { return $v + $s->getMemoryUsage(); }) ?? 0;
    }

    /**
     * Returns the peak memory usage while performing statements
     *
     * @return int
     */
    public function getPeakMemoryUsage() : int
    {
        return array_reduce($this->executedStatements, function ($v, $s) { $m = $s->getEndMemory(); return $m > $v ? $m : $v; }) ?? 0;
    }

[angeljqv]

Closed by #523