WordPress: The optional module bcmath/imagick is not installed or has been disabled

Tips when using WordPress Tools - Site Health:可选的模组bcmath/imagick未被安装或已被禁用

Solution

bcmath

yum install php-bcmath/service php-fpm restart

imagick

Before installing the Imagick extension, let’s briefly talk about two concepts:
ImageMagick, a third-party image processing software, has more powerful functions than GD. It is recommended to install both as there is no conflict.
Imagick is an extension module of PHP, which calls the API provided by ImageMagick to operate images.
So before installing the imagick extension, ImageMagick must be installed first.

Install ImageMagick

yum install ImageMagick
convert -version                  #能看到版本号就是安装成功
yum install php-pear php-dev      #安装依赖
yum install ImageMagick-devel     #安装依赖 

Install imagick

 去官网查找需要的版本：https://pecl.php.net/package/imagick
 下载包：wget http://pecl.php.net/get/imagick-3.4.4.tgz
 解压包：tar -zxvf imagick-3.4.4.tgz 
 进入包文件夹 cd ./imagick-3.4.4 
 phpize
 ./configure
 make && make install
 vim /etc/php.ini    #配置php.ini  
 文件查找: ( find / -name  php.ini ）
 添加 extension=imagick.so ，大概在880行左右，在vi/vim下可用（‘/extension=’ 快速定位）
 service php-fpm restart    #重启php-fpm

problem solved

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