uploading data precaution

Question 1

$name = preg_replace(“/[^A-Za-z0-9.]/”, “”, $name);

Answer 1

leaves only the characters A-Z, a-z, 0-9, and period in the string $nae, and strips out anything else

Question 2

$name = strtolower(ereg_replace(“[^A-Za-z0-9.]”, “”, $name));

Answer 2

changes all uppercase characters to lowercase and strips out anything besides characters a-z, 0-9 and period.