php - 动态缩略图 PHP

Question

我想到了这个:

<?php 

$dir = $_GET['dir'];

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

$create = imagecreatetruecolor(150, 150); 
$img = imagecreatefromjpeg($dir); 
imagecopyresampled($create, $img, 0, 0, 0, 0, 150, 150, 150, 150); 

imagejpeg($create, null, 100); 

?>

它通过访问来工作:

http://example.com/image.php?dir=thisistheimage.jpg

哪个工作正常......但输出很糟糕:

有人可以将我的图像代码修改为 150 x 150 覆盖黑色区域...

谢谢。

解决方案:

<?php 

$dir = $_GET['dir'];

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

list($width, $height) = getimagesize($dir);

$create = imagecreatetruecolor(150, 150); 
$img = imagecreatefromjpeg($dir); 

$newwidth = 150;
$newheight = 150;

imagecopyresized($create, $img, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);

imagejpeg($create, null, 100); 

?>

Answer 1

使用imagecopyresized :

$newwidth = 150;
$newheight = 150;
imagecopyresized($create, $image, 0, 0, 0, 0, $newwidth, $newheight, $oldwidth, $oldheight);