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:
Fatal error: Call to undefined function 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.
sudo apt-get install phpx.x-gd
sudo service apache2 restart
x.x is the versión php.
after
systemctl restart php-fpm
the Gd library works.
As mentioned before, you might need GD library installed.
On a shell, check your php version first:
php -v
Then install accordingly. In my system (Linux-Ubuntu) it's php version 7.0:
sudo apt-get install php7.0-gd
Restart your webserver:
systemctl restart apache2
You should now have GD library installed and enabled.
You must enable the library GD2.
Find your (proper) php.ini file
Find the line: ;extension=php_gd2.dll and remove the semicolon in the front.
The line should look like this:
extension=php_gd2.dll
Then restart apache and you should be good to go.
In Ubuntu/Mint (Debian based)
$ sudo apt-get install php5-gd
After installing php5-gd apache restart is needed.
For php 7 on Ubuntu:
sudo apt-get install php7.0-gd
In CentOS, RedHat, etc. use below command. don't forget to restart the Apache. Because the PHP module has to be loaded.
yum -y install php-gd
service httpd restart
If you are like me and you are using one of the PHP Docker images as your base, you need to add the gd extension using different instructions then what's discussed above.
For the php:7.4.1-apache image you need to add in your Dockerfile:
RUN apt-get update && \
apt-get install -y zlib1g-dev libpng-dev libjpeg-dev
RUN docker-php-ext-configure gd --with-jpeg && \
docker-php-ext-install gd
These dev packages are needed for compilation of the GD php extension. For me this resulted in activation of GD with PNG and JPEG support in PHP.
You can still get Fatal error: Call to undefined function imagecreatefromjpeg() even if GD is installed.
The solution is to install/enable jped lib:
On Ubuntu:
apt-get install libjpeg-dev
apt-get install libfreetype6-dev
On CentOS:
yum install libjpeg-devel
yum install freetype-devel
If compiling from source add --with-jpeg-dir --with-freetype-dir or --with-jpeg-dir=/usr --with-freetype-dir=/usr.
For more details check https://www.tectut.com/2015/10/solved-call-to-undefined-function-imagecreatefromjpeg/
Source: Stackoverflow.com