PHP Fatal error: Call to undefined function imagettftext()

Question

Why am I getting the error PHP Fatal error: Call to undefined function imagettftext() on line 29?

Answer 1

I solve the same issue on my docker php:7-fpm enviroment, and I post the solution here:

---

If using Dockerfile to setup the enviroment

# more Dockerfile  
FROM php:fpm 
RUN apt-get update && apt-get install -y \
    libfreetype6-dev \
        libmcrypt-dev \
        libpng12-dev \
        libjpeg-dev \
        libpng-dev
    && docker-php-ext-install iconv mcrypt \
    && docker-php-ext-configure gd \
        --enable-gd-native-ttf \
        --with-freetype-dir=/usr/include/freetype2 \
        --with-png-dir=/usr/include \
        --with-jpeg-dir=/usr/include \
    && docker-php-ext-install gd \
    && docker-php-ext-install mbstring \
    && docker-php-ext-enable gd

If want to add the FreeType module on an exist container:

# on docker host machine
docker exec -it $FPM_CONTAINER bash

>>>>

# inside the container
apt-get install -y \
        libfreetype6-dev \
        libmcrypt-dev \
        libpng12-dev \
        libjpeg-dev \
        libpng-dev
docker-php-ext-configure gd \
        --enable-gd-native-ttf \
        --with-freetype-dir=/usr/include/freetype2 \
        --with-png-dir=/usr/include \
        --with-jpeg-dir=/usr/include \
    && docker-php-ext-install gd

exit

<<<<

docker restart $FPM_CONTAINER