裁剪图像

Question

下面的代码工作在我的笔记本电脑，但远程服务器上不起作用：

<?php 
error_reporting(E_ALL); 
ini_set('display_errors', '1'); 

$filename = "../../content/".base64_decode($_GET["file"]); 


$ext = pathinfo($filename, PATHINFO_EXTENSION); 

if ($ext=="jpg" || $ext=="jpeg") { 
$image_s = imagecreatefromjpeg($filename); 
} else if ($ext=="png") { 
$image_s = imagecreatefrompng($filename); 
} 

$width = imagesx($image_s); 
$height = imagesy($image_s); 


$newwidth = 285; 
$newheight = 232; 

$image = imagecreatetruecolor($newwidth, $newheight); 
imagealphablending($image,true); 
imagecopyresampled($image,$image_s,0,0,0,0,$newwidth,$newheight,$width,$height); 

// create masking 
$mask = imagecreatetruecolor($width, $height); 
$mask = imagecreatetruecolor($newwidth, $newheight); 



$transparent = imagecolorallocate($mask, 255, 0, 0); 
imagecolortransparent($mask, $transparent); 



imagefilledellipse($mask, $newwidth/2, $newheight/2, $newwidth, $newheight, $transparent); 



$red = imagecolorallocate($mask, 0, 0, 0); 
imagecopy($image, $mask, 0, 0, 0, 0, $newwidth, $newheight); 
imagecolortransparent($image, $red); 
imagefill($image,0,0, $red); 

// output and free memory 
header('Content-type: image/png'); 
imagepng($image); 
imagedestroy($image); 
imagedestroy($mask); 
?> 

它显示了我的笔记本电脑下面的图片： http://i.stack.imgur.com/Aai1r.png

这它是如何显示在远程服务器上的： http://i.stack.imgur.com/77fbV.png

您怎么看？什么是问题？

Answer 1

改了行：

imagecopy($image, $mask, 0, 0, 0, 0, $newwidth, $newheight); 

到：

imagecopymerge($image, $mask, 0, 0, 0, 0, $newwidth, $newheight,100); 

Answer 2

我想你可能在filepath方面有问题。检查PATHINFO返回有效扩展和$文件名申报的东西之后添加，以检查是否存在并且是可读

if(!is_file($file) || !is_readable($file)){ die('Readable file not found');} 

Answer 3

我想如何调试http://blog.regehr.org/archives/199一个基本的阅读将是对你有用，帮助您解决问题