Supported Versions: PHP 4, PHP 5, PHP 7, PHP 8
Convert the first byte of a string to a value between 0 and 255
ord(string $character): int
        $img $this->manager()->make('tests/images/trim.png');

        
$img->interlace();

        
$img->encode('png');

        
$this->assertTrue((ord($img->encoded[28]) != '0'));

        
$img->interlace(false);

        
$img->encode('png');

        
$this->assertFalse((ord($img->encoded[28]) != '0'));
        $this->assertTrue((ord($img->encoded[28]) != '0'));

        
$img->interlace(false);

        
$img->encode('png');

        
$this->assertFalse((ord($img->encoded[28]) != '0'));

    }



    public function 
testGammaImage()
        $img $this->manager()->make('tests/images/trim.png');

        
$img->interlace();

        
$img->encode('png');

        
$this->assertTrue((ord($img->encoded[28]) != '0'));

        
$img->interlace(false);

        
$img->encode('png');

        
$this->assertFalse((ord($img->encoded[28]) != '0'));
        $this->assertTrue((ord($img->encoded[28]) != '0'));

        
$img->interlace(false);

        
$img->encode('png');

        
$this->assertFalse((ord($img->encoded[28]) != '0'));

    }



    public function 
testGammaImage()