Hi Folks,
I am new to php.
I want to accept a character string which I will use as a unique user
id. I want to check the string to ensure the user has not typed
characters that I consider to be invalid as part of a user id. I was
thinking of doing something along the lines of:
if (strpbrk($userid, '~!@#$%^&*()_+=-{}[]\\|;\':"<>?,./`') <> null) {
blah, blah, blah......
but I think that would still leave me open to control characters.
I am thinking maybe I should loop through the string character by
character and check it's ascii value (using ord) is within the range of
a-z and A-Z ?
Is this the best way of achieving this ? Is there a php command to do
something similar ? I have done a few web searches and haven't come up
with much.
TIA,
JC
