Setting Up Driver
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2. Accessing Printers Admin Web UIOpen on Browser the Address: localhost:631/admin. 
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3. Adding PrinterThen Choose Add Printer.   Then Follow the Wizard until you load the suited PPD Driver… 
Contents
$schemamarkup = get_post_meta(get_the_ID(), 'schemamarkup', true); if(!empty($schemamarkup)) { echo $schemamarkup; }
Open on Browser the Address: localhost:631/admin.
Then Choose Add Printer.
 
Then Follow the Wizard until you load the suited PPD Driver…