如何将变量附加到php中的对象

Question

I have this, that doesnt work obviously.

$start = $hours->start{$day};

I need to be able the change the $day dynamically. $day can be any day of the week

//For example
$start = $hours->startSunday;

Let me try to be more clear. The following objects contain a certain time

// will echo something like 8:00am
echo $hours->startSunday;

//will echo something like 7:00am
echo $hours->startMonday;

I need to be able to change the day part dynamically with a variable, since it can be any day of the week.

//so something like
echo $hours->start.$day;

but that doesnt work

Answer 1

First. You could edit syntax with

$hours = new stdClass();
$day = 'Sunday';
$hours->{'start'.$day} = 10;
$start = $hours->{'start'.$day};
var_dump($start);

Secnod. Better ot use getter and setter methods.

class Hours
    {
    private $hours = array();
    public function getStart($day)
        {
        return $this->hours[$day];
        }
    public function setStart($day, $value)
        {
        $this->hours[$day] = $value;
        }
    }
$hours = new Hours();
$day = 'Sunday';
$hours->setStart($day, 10);
$start = $hours->getStart($day);
var_dump($start);