ImageMagick转换工作在命令行，但不是通过PHP exec（） [英] ImageMagick convert works in commandline, but not via PHP exec()

问题描述

我使用PHP的 exec（）使用ImagicMagick的 convert 转换图像。这是在CentOS服务器上运行。

  exec（convert http://www.google.com/images/srpr/ logo3w.png.jpg 
 -resize 640 /home/mysite/public_html/public/img/posts/original/1414_301a4.jpg）; 
  

使用 exec（）新图像出现在目标文件夹中。但是，如果我在shell中运行相同的命令，它可以正常工作！

我相信这是一个PATH问题。如果是这样，我如何检查PHP正在使用的路径，如何在PHP中设置正确的路径？

解决方案

首先，应尝试使用确实存在且可检索的输入文件：

 wget http://www.google.com/images/srpr/logo3w.png.jpg 
 
 --2012-08-21 20：55：24-- http://www.google.com /images/srpr/logo3w.png.jpg 
解析www.google.com（www.google.com）... 173.194.35.179，173.194.35.177，173.194.35.178，... 
连接到www.google.com（www.google.com）| 173.194.35.179 |：80 ...已连接。 
 HTTP请求发送，等待响应... 404未找到
 2012-08-21 20:55:24错误404：找不到。 
 

然后查看您的PHP使用：

  exec（它转换2> /tmp/whichconvert.2 1> whichconvert.1）
  
 
 
 
和
  tmp / whichconvert。{1,2} 
  
 最后， 转换：
 的完整路径exec（/ usr / local / full / path / to / convert标志：
 -resize 640 /home/mysite/public_html/public/img/posts/original/1414_301a4.jpg）; 
  
，然后
 <  
 
 
 
更新：
 
 
 
您要检索的文件可能不是 logo3w.png .jpg ，但 logo3w.png ：
 
 wget http://www.google.com/images/srpr/logo3w.png 
 --2012-08-21 21：04：22-- http://www.google.com/images/srpr/ logo3w.png 
解析www.google.com（www.google.com）... 173.194.35.180，173.194.35.177，173.194.35.179，... 
连接到www.google.com www.google.com）| 173.194.35.180 |：80 ...已连接。 
 HTTP请求发送，等待响应... 200 OK 
长度：7007（6.8K）[image / png] 
保存到：'logo3w.png'
 
 100％[============================================== =======>] 7,007 --.- K / s in 0.02s 
 
 2012-08-21 21:04:22（451 KB / s） - 'logo3w.png'保存[7007/7007] 
 
 
 
 
 此外，仅适用于本地文件URIs），您可能需要检查 convert 使用的 http委托是否确实安装在您的系统上：
  convert -list delegate | grep http 
 https => / opt / local / bin / curl-s -k -o％ohttps：％M
  
 另外，检查您的PHP运行的用户帐户是否确实有权写入目标目录：
  exec（touch / home / mysite / public_html / public / img / posts / original / touchtest）; 
  
，然后
  ls -l / home / mysite / public_html / public / img / posts / original / touchtest 
  
 
I am using PHP's exec() to convert an image using ImagicMagick's convert. This is being run on a CentOS server.
exec(convert http://www.google.com/images/srpr/logo3w.png.jpg 
    -resize 640 /home/mysite/public_html/public/img/posts/original/1414_301a4.jpg);
Using exec() does not cause the new image to appear in the destination folder. However if I were to run the same command in the shell, it works perfectly!

I believe this is a PATH problem. If so, how can I check the path that PHP is using, and how can I set the correct path in PHP?
解决方案
First, you should try with an input file that does indeed exist and is retrievable:
wget http://www.google.com/images/srpr/logo3w.png.jpg

  --2012-08-21 20:55:24--  http://www.google.com/images/srpr/logo3w.png.jpg
  Resolving www.google.com (www.google.com)... 173.194.35.179, 173.194.35.177, 173.194.35.178, ...
  Connecting to www.google.com (www.google.com)|173.194.35.179|:80... connected.
  HTTP request sent, awaiting response... 404 Not Found
  2012-08-21 20:55:24 ERROR 404: Not Found.
Then, to see which convert your PHP uses:
exec(which convert 2>/tmp/whichconvert.2 1>whichconvert.1)
and
cat /tmp/whichconvert.{1,2}
Last, also try with the full path to convert:
exec(/usr/local/full/path/to/convert logo: 
-resize 640 /home/mysite/public_html/public/img/posts/original/1414_301a4.jpg);
and then
identify /home/mysite/public_html/public/img/posts/original/1414_301a4.jpg




Update:

The file that you meant to retrieve was probably not logo3w.png.jpg, but logo3w.png:
  wget http://www.google.com/images/srpr/logo3w.png
  --2012-08-21 21:04:22--  http://www.google.com/images/srpr/logo3w.png
  Resolving www.google.com (www.google.com)... 173.194.35.180, 173.194.35.177, 173.194.35.179, ...
  Connecting to www.google.com (www.google.com)|173.194.35.180|:80... connected.
  HTTP request sent, awaiting response... 200 OK
  Length: 7007 (6.8K) [image/png]
  Saving to: ‘logo3w.png’

  100%[=====================================================>] 7,007       --.-K/s   in 0.02s   

  2012-08-21 21:04:22 (451 KB/s) - ‘logo3w.png’ saved [7007/7007]
Also, in case it works for local files only (not remote http-URIs) you may need to check if the http delegate used by convert is indeed installed on your system:
convert -list delegate | grep http
      https =>          "/opt/local/bin/curl" -s -k -o "%o" "https:%M"
Plus, check if the user account your PHP runs under does indeed have the right to write to the target directory:
exec(touch /home/mysite/public_html/public/img/posts/original/touchtest);
and then
ls -l  /home/mysite/public_html/public/img/posts/original/touchtest


                        
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