错误WriteBlob使用ImageMagick 6.7.9失败 [英] error WriteBlob Failed using ImageMagick 6.7.9

问题描述

我想从pdf文件创建图像。我在Linux服务器
上安装了ImageMagick，并从具有root访问权限的终端成功创建了一个映像。

I want to create an image from a pdf file. I have installed ImageMagick on a Linux server and successfully created an image from a terminal with root access.

命令：

 /usr/local/bin/convert http://www.artisticancestry.com/sites/default/files/media/Getting%20Started_7.pdf /public_html/testing.png

但是当我要从php exec（）函数执行这个命令时。它显示此类错误

But When i am going to execute this command from php exec() function. It is showing this type of error

错误：
转换：无法打开图片 / public_html / testing-0.png'：没有这样的文件或目录@ error / blob.c / OpenBlob / 2642。
convert：WriteBlob Failed /public_html/testing-0.png'@ error / png.c / MagickPNGErrorHandler / 1751。

error: convert: unable to open image /public_html/testing-0.png': No such file or directory @ error/blob.c/OpenBlob/2642. convert: WriteBlob Failed/public_html/testing-0.png' @ error/png.c/MagickPNGErrorHandler/1751.

有一些权限问题，但不知道哪个文件没有权限。如何找出导致此问题的原因以及如何解决？

There is some permission issue but don't know which file has no permission.How can I find out what is causing this problem and how can I solve it?

推荐答案

这是我的许可问题

chmod -R 777 / dir

chmod -R 777 /dir

/ dir =您要编写图像的目录

/dir = Directory where you want to writing your image

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