Check given number is positive and number of digits

<?php

// check number is greater than 0 and $length digits long
  // returns 1 on success
  function isNumberlength($num, $length){
  if($num > 0 && strlen($num) == $length)
  
    return 1;
    else
    return 0;
}



/// call the function with your  values








echo isNumberlength(100,5);



?>