I would like to determine whether or not a variable has any text at all.
For instance, my current code is this:

if (is_numeric ($id)) 
{
  //do stuff
} 
else 
{
  // do other stuff 
}

However, there is a problem if my variable contains both a string and a number
such as "you are 93 years old",
because it sees that number 93 is present and considers the variable numeric.
I want the if statement to only "do stuff" if there is absolutely no text in the variable at all.

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