Installing libpng12
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2. Enabling libpng12 PPA Repo
Adding libpng12 PPA for Ubuntu GNU/Linux
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3. Installing libpng12
Installing libpng12 on Ubuntu 20.04
Simply play:sudo apt install libpng12-0 libpng12-dev
Contents
$schemamarkup = get_post_meta(get_the_ID(), 'schemamarkup', true); if(!empty($schemamarkup)) { echo $schemamarkup; }
Adding libpng12 PPA for Ubuntu GNU/Linux
Installing libpng12 on Ubuntu 20.04
Simply play:
sudo apt install libpng12-0 libpng12-dev