imagecreatefromjpeg 和类似的函数在 PHP 中不起作用
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imagecreatefromjpeg and similar functions are not working in PHP
提问by UserIsCorrupt
I've searched for this and the solutions provided in past questions are completely incomprehensible to me. Whenever I run functions like imagecreatefromjpeg, I get this:
我已经搜索过这个，过去问题中提供的解决方案对我来说是完全无法理解的。每当我运行像这样的函数时imagecreatefromjpeg，我都会得到这个：
Fatal error: Call to undefined function imagecreatefromjpeg() ...
致命错误：调用未定义的函数 imagecreatefromjpeg() ...
I'm working on a new install of PHP; my last installation never had this problem. I don't get what's going on.
我正在安装新的 PHP；我上次安装从来没有遇到过这个问题。我不明白发生了什么。
回答by admoghal
Install GD Library
安装 GD 库
Which OS you are using?
您使用的是哪个操作系统？
http://php.net/manual/en/image.installation.php
http://php.net/manual/en/image.installation.php
Windows http://www.dmxzone.com/go/5001/how-do-i-install-gd-in-windows/
Windows http://www.dmxzone.com/go/5001/how-do-i-install-gd-in-windows/
Linux http://www.cyberciti.biz/faq/ubuntu-linux-install-or-add-php-gd-support-to-apache/
Linux http://www.cyberciti.biz/faq/ubuntu-linux-install-or-add-php-gd-support-to-apache/
回答by Pierre de LESPINAY
In Ubuntu/Mint (Debian based)
在 Ubuntu/Mint（基于 Debian）中
$ sudo apt-get install php5-gd
回答by Commander
You must enable the library GD2.
您必须启用库 GD2。
Find your (proper) php.ini file
找到你的（正确的）php.ini 文件
Find the line: ;extension=php_gd2.dll and remove the semicolon in the front.
找到这一行：;extension=php_gd2.dll，去掉前面的分号。
The line should look like this:
该行应如下所示：
extension=php_gd2.dll
Then restart apache and you should be good to go.
然后重新启动apache，你应该很高兴。
回答by Mugoma J. Okomba
You can still get Fatal error: Call to undefined function imagecreatefromjpeg()even if GD is installed.
Fatal error: Call to undefined function imagecreatefromjpeg()即使安装了GD，您仍然可以获得。
The solution is to install/enable jped lib:
解决方案是安装/启用 jped lib：
On Ubuntu:
在Ubuntu 上：
apt-get install libjpeg-dev
apt-get install libfreetype6-dev
On CentOS:
在 CentOS 上：
yum install libjpeg-devel
yum install freetype-devel
If compiling from source add --with-jpeg-dir --with-freetype-diror --with-jpeg-dir=/usr --with-freetype-dir=/usr.
如果从源代码编译添加--with-jpeg-dir --with-freetype-dir或--with-jpeg-dir=/usr --with-freetype-dir=/usr.
For more details check https://www.tectut.com/2015/10/solved-call-to-undefined-function-imagecreatefromjpeg/
有关更多详细信息，请查看https://www.tectut.com/2015/10/solved-call-to-undefined-function-imagecreatefromjpeg/
回答by CodeNoob
sudo apt-get install phpx.x-gd
sudo service apache2 restart
x.x is the versión php.
xx 是 php 版本。
回答by iKode
For php 7 on Ubuntu:
对于 Ubuntu 上的 php 7：
sudo apt-get install php7.0-gd
须藤 apt-get 安装 php7.0-gd
回答by Piotr Olaszewski
After installing php5-gdapache restart is needed.
安装后php5-gd需要重启apache。
回答by Muthukumar Anbalagan
In CentOS, RedHat, etc. use below command. don't forget to restart the Apache. Because the PHP module has to be loaded.
在 CentOS、RedHat 等中，使用以下命令。不要忘记重新启动Apache。因为必须加载 PHP 模块。
yum -y install php-gd
service httpd restart
回答by Tktongmaicom Tkt
aftersystemctl restart php-fpm
the Gd library works.
在systemctl restart php-fpm
Gd 库工作之后。
回答by arakno
As mentioned before, you might need GD library installed.
如前所述，您可能需要安装 GD 库。
On a shell, check your php version first:php -v
在 shell 上，首先检查你的 php 版本：php -v
Then install accordingly. In my system (Linux-Ubuntu) it's php version 7.0:sudo apt-get install php7.0-gd
然后相应地安装。在我的系统（Linux-Ubuntu）中，它是 php 版本 7.0：sudo apt-get install php7.0-gd
Restart your webserver:systemctl restart apache2
重新启动您的网络服务器：systemctl restart apache2
You should now have GD library installed and enabled.
您现在应该安装并启用了 GD 库。
