您的GD缺少JPEG支持。如果你在docker env中安装PHP,你需要安装libjpeg-dev,libfreetype6-dev和
docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/
如果您在任何hosting-env中使用PHP,请与您的托管服务提供商联系。我看起来像
gd
GD Support => enabled
GD Version => bundled (2.1.0 compatible)
FreeType Support => enabled
FreeType Linkage => with freetype
FreeType Version => 2.6.3
GIF Read Support => enabled
GIF Create Support => enabled
JPEG Support => enabled
libJPEG Version => 6b
PNG Support => enabled
libPNG Version => 1.6.28
WBMP Support => enabled
XBM Support => enabled