Foreach is only returning the first value of an array

I don't understand why foreach is only returned the first value from the $even_values array. Here is the full code.

class fibonacci {

    private $seq_value;
    private $sequence = array(1,2);
    private $even_values = array();

    public function __construct(int $seq_value){
    $this->seq_value = $seq_value;
    }

    
    public function fibonacci_sequence(){
       for ($i=0; $i<=$this->seq_value-3; $i++) { 
        $this->sequence[] = $this->sequence[$i] + $this->sequence[$i+1];
       } 
       return $this->sequence;
       //print_r($this->sequence);
    }

    public function even_values(){
        foreach ($this->sequence as $value) {
            if ($value % 2 == 0) {
                $this->even_values[] = $value;
            }
        }
        //return $this->even_values;
       print_r($this->even_values);
    }


 }


 $fibonacci = new fibonacci(10);
 $fibonacci->even_values();

source https://stackoverflow.com/questions/67842723/foreach-is-only-returning-the-first-value-of-an-array