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A problem that I've run into during the unending quest for complete test coverage is mocking of internal PHP functions. Unit tests are easy to write as long as a class method returns everything it does, but when a method starts to call out to certain internal PHP functions things get difficult. It's…
Sending plain emails with PHP can be pretty easy. On a basic level you can just call mail(), which triggers the server-side sendmail command. Pass in three parameters (a recipient email address, subject, and message) and you're done. When you start looking into file attachments and HTML messages,…