11.
How many functions does PHP offer for searching and modifying strings using Perl-compatible regular expressions.

12.
What will be the output of the following PHP code?
<?php
$foods = array("pasta", "steak", "fish", "potatoes");
$food = preg_grep("/^s/", $foods);
print_r($food);
?>

13.
Say we have two compare two strings which of the following function/functions can you use?
1. strcmp()
2. strcasecmp()
3. strspn()
4. strcspn()

14.
Which one of the following functions will convert a string to all uppercase?

15.
What will be the output of the following PHP code?
<?php
$title = "O'malley wins the heavyweight championship!";
echo ucwords($title);
?>