preg_match error Unknown modifier '{' [duplicate]

Answer 1

You're missing a delimiter around your regular expressions:

if((preg_match('/[a-zA-Z]{1,7}+/',$_POST['naam'])) and (preg_match('/[^\@\#\<\>\&\*\/]+[a-zA-Z0-9]+!/',$_POST['password'])))

Answer 2

{1,7} - this means 1 to 7

{1,7}+ - this is awkward, as + denotes that preceding char should be at least once. usually used as [a-z]+ <-- requires a-z

{1,7}+ is wrong.