Lintian tag information: missing-dependency-on-phpapi (type: error)

Description (from lintian-explain-tags)

This package includes a *.so file in /usr/lib/phpN (where N is a number
representing the major PHP version), normally indicating that it includes
a PHP extension. PHP extensions must depend on phpapi-$(php-configN
--phpapi), without adding an alternative package with the OR operator.

This can usually be achieved by, for example, adding the following code to
the binary-arch target of the rules file and adding ${php:Depends} to the
Depends field of the binary package shipping the extension:

echo "php:Depends=phpapi-$(php-config5 --phpapi)" > debian/substvars

Visibility: error
Show-Always: no
Check: binaries/prerequisites/php

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