I have installed Zend OPcache v7.1.30-1+ubuntu16.04.1+deb.sury.org+1 on my ubuntu machine but on indexing command it shows error Notice: Use of undefined constant MCRYPT_BLOWFISH - assumed 'MCRYPT_BLOWFISH'

please suggest pic1


It's looks like missing mcrypt

sudo apt-get install php7.1-mcrypt


sudo phpenmod mcrypt

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