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 PHP Linkedin test answers

What is missing from this code, which is supposed to create a test cookie?

1 $string_name = " testcookie";

2 $string_value = "This is a test cookie";

3 $expiry_info = time()+259200;

4 $string_domain = "localhost.localdomain";

• The cookie session is missing.
• The call to setcookie() is missing.
• The $_COOKIE array is missing.
• The $_REQUEST is missing.

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What is the value of $total in this calculation?

$total = 2 + 5 * 20 - 6 / 3;

• 126
• 44
• 138
• 100

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What is the purpose of adding a lowercase "u" as a modifier after the final delimiter in a Perl-compatible regular expression?

• PHP doesn't use lowercase "u" as a modifier in regular expressions.
• It makes the dot metacharacter match anything, including newline characters.
• It inverts the greediness of the quantifiers in the pattern so they are not greedy by default.
• Both the pattern and subject string are treated as UTF-8.

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Which code snippet uses the correct syntax for creating an instance of the Pet class?

• $cat = new Pet();
• all of these answers
• $horse = (new Pet);
• $dog = new Pet;

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What is the best way to explain what this script does?

1 if (!$_SESSION['myusername']) 

2 {  

3    header('location: /login.php'); 

4    exit; 

5 }

• This script validates the username and password.
• This script times the session for myusername.
• Cookies are starting to be stored as a result of this script.
• This script is on a page that requires the user to be logged in. It checks to see if the user has a valid session.

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