<?PHP
// The file
$filename = 'test.jpg';
$PErcent = 0.5;

// Content type
header('Content-type: image/jpeg');

// Get new dimensions
list($width,$height) = getimagesize($filename);
$new_width = $width * $percent;
$new_height = $height * $percent;

// Resample
$image_p = imagecreatetruecolor($new_width,$new_height);
$image = imagecreatefromjpeg($filename);
imagecopyresampled($image_p,$image,$new_width,$new_height,$width,$height);

// Output
imagejpeg($image_p,null,100);
?>

我的问题是,如何保存这个已调整大小的图像？我需要吗？有没有办法操纵调整大小的图像而不保存它？