Build an array called $myWeek which will hold the array elements Today, Yesterday and then builds up the rest of the week by the name of the day going back 1 week.
Then you just need to pass your date to the function.
There are times when I have encountered the need to decompress a response from a PHP request.
This is how it's done, but you must have control of the request and you can set the Accept-Encoding header.
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions.
Consider email address RFCs:
Look at HTML5 form input element (with type=email) regex pattern: