3.
[:alpha:] can also be specified as.

4.
How many functions does PHP offer for searching strings using POSIX style regular expression?

5.
What will be the output of the following PHP code?
<?php
$username = "jasoN";
if (ereg("([^a-z])",$username))
  echo "Username must be all lowercase!";
else
  echo "Username is all lowercase!";
?>

7.
POSIX stands for

8.
What will be the output of the following PHP code?
<?php
$text = "this istsome text thatnwe might like to parse.";
print_r(split("[nt]",$text));
?>

9.
Which of the following would be a potential match for the Perl-based regular expression /fo{2,4}/ ?
1. fol
2. fool
3. fooool
4. fooooool

10.
Which among the following is/are not a metacharacter?
1. /a
2. /A
3. /b
4. /B