php imgick extension environment installation

Question

I would like to ask you about the environment for installing the imagick extension in PHP. After the installation was successful, I used the convert command to convert PDF images successfully. However, when using the PHP code to convert, Fatal error: Uncaught exception 'ImagickException' with message ' appeared. No decode delegate for this image format `' @ error/constitute.c/ReadImage/561' error message. I found a lot of information on the Internet and copied it over and over again, which cannot actually solve the problem.