Loosely typed languages are sometimes thought to make you a better programmer because you have to do a lot more checking while you are writing software.
The sad truth, of course, is that you don't. We've all stared at the screen wondering why $t refuses to increase inside a loop, only to find that there a few lines later, just off-screen, there is a line that assigns TRUE to $t. And we've all sighed and whispered "why doesn't it tell me I can't do that...."
There is nothing good about being loosely typed. People often say that it's "convenient", but... how? Is it really so much work to use two variables instead of one? Does your code become in any way more readable if you re-use variables for different kinds of data? Does finding bugs become easier?
Isn't it at least a little strange that in PHP it's perfectly acceptable to use ctype_digit((string) $var) to check if a variable contains an integer? How is that better than defining $var as an integer, after which it is simply guaranteed to be an integer?
Somebody, tell me what's good about loosely typed variables...