Type casting and Comparison with Loose Operator “==”

Question

I have a problem baffling me terribly. I noticed this before but didn\'t give it any heed until today. I was trying to write my own check for integer strings. I know of

Answer 1

Here's a function that more rigorously tests for either an int or an integer string.

function isIntegerNumeric($val) {
  return (
    is_int($val)
      || (
        !is_float($val)
          && is_numeric($val)
          && strpos($val, ".") === false
      )
  );
}

It's relatively quick and avoids doing any string checking if it doesn't have to.