Get file extension from a string in PHP

Sometimes you just need to get the file extension from a string.  Here are a couple quick solutions to get it in literally 1 line of code.

Option #1

echo pathinfo('puppies.html', PATHINFO_EXTENSION); // Outputs: "html"

Option #2

echo substr(strrchr('puppies.html', '.'), 1); // Outputs: "html"
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