setterGetter.php

<?php

trait setterGetter
{
    private function resolveVariable()
    {
        $method = debug_backtrace()[1]['function'];
        $variable = strtolower(substr($method, 3));
        
        if ($variable === '') {
            throw new RuntimeException(sprintf("Can't call %s::%s", __CLASS__, $method));
        }
        
        return $variable;
    }
    
    public function get()
    {
        $variable = $this->resolveVariable();
        return $this->$variable;
    }
    
    public function set($value)
    {
        $variable = $this->resolveVariable();
        $this->$variable = $value;
        
        return $this;
    }
}

class Bouh {
    use setterGetter {
        get as getB;
        set as setB;

        get as getC;
        set as setC;
    }
    
    private $b;
    private $c;
}

$bouh = new Bouh();
$bouh->setB("it's b");
$bouh->setC("it's c");
echo $bouh->getB() . PHP_EOL;
echo $bouh->getC() . PHP_EOL;