放大的照片吗？

Question

//Get current dimensions 
$width = imagesx($myimage); 
$height = imagesy($myimage); 

$width = $width * ($zoom/100); 
$height = $height * ($zoom/100); 

$scale = min($new_width/$width, $new_height/$height); 

$new_width = ceil($scale * $width); 
$new_height = ceil($scale * $height); 




    imagecopyresampled($image_p, $myimage, 0, 0, $offset_x * -1, $offset_y * -1, $new_width, $new_height, $width, $height); 

我想放大的图片，但实际上它变得更小，而不是放大的。变焦就像100分之113= 1.13的系数应该在13％缩放

Answer 1

我想你想要的是：

//Get current dimensions 
$width = imagesx($myimage); 
$height = imagesy($myimage); 

$new_width = $width * $zoom/100; //120 zoom will increase the image by 20% 
$new_height = $height * $zoom/100; 

imagecopyresampled($image_p, $myimage, 0, 0, 0, 0, $new_width, $new_height, $width, $height); 

实际上是在php.net的第一个例子是变焦例如： http://php.net/manual/en/function.imagecopyresampled.php