I am wondering if someone could shed some light on
this aspect of PHP. It might be something obvious, but
I am not able to figure it out.

I have a function that returns a dynamically generated
HTML string. However, I need a way to let the caller
know if that function has failed. One way I thought
of, is to have an empty return:


hoping that I could check for isset(). However, isset
reports "1". (In the C world, I could easily check for
Is there a way in PHP to return a failure flag back to
the caller? (Of course, I could use an argument as a
success flag. But, I am wondering if there is a way to
do it in the return variable.)

Thank you in advance.

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