在 Docker 中安装 GD 扩展

Question

我是 Docker 的新手，我正在尝试安装 PHP GD扩展。

这是我当前的 Dockerfile：

FROM php:7.4-fpm-alpine

RUN docker-php-ext-install mysqli pdo pdo_mysql bcmath gd

通过运行 docker 时docker-compose build && docker-compose up -d出现很多错误，最后我收到以下消息：

configure: error: Package requirements (zlib) were not met:

Package 'zlib', required by 'virtual:world', not found

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables ZLIB_CFLAGS
and ZLIB_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.
ERROR: Service 'php' failed to build: The command '/bin/sh -c docker-php-ext-install mysqli pdo pdo_mysql bcmath gd' returned a non-zero code: 1

如果末尾没有“gd”，Docker 容器会正常运行。

可能是什么问题，我该如何解决？

Answer 1

您可以尝试在 Dockerfile 中添加这些设置：

FROM php:7.4-fpm
RUN apt-get update && apt-get install -y \
        libfreetype6-dev \
        libjpeg62-turbo-dev \
        libpng-dev \
    && docker-php-ext-configure gd --with-freetype --with-jpeg \
    && docker-php-ext-install -j$(nproc) gd

官方文档。希望对你有帮助。

Answer 2

在我使用PHP8.0的 docker 中，通过将以下几行添加到我的文件中，我让GD 能够处理 jpg、png 和 webpphp.dockerfile：

FROM php:8.0-fpm-alpine

# Install dependencies for GD and install GD with support for jpeg, png webp and freetype
# Info about installing GD in PHP https://www.php.net/manual/en/image.installation.php
RUN apk add --no-cache \
        libjpeg-turbo-dev \
        libpng-dev \
        libwebp-dev \
        freetype-dev

# As of PHP 7.4 we don't need to add --with-png
RUN docker-php-ext-configure gd --with-jpeg --with-webp --with-freetype
RUN docker-php-ext-install gd