3. PHP variable names are case sensitive and variables do not need to be declared before they can be used. Answer: A and D.
4. The include instruction will create a warning, but allow the script to continue running when an error is encountered. Answer: C.
5. There are at least three ways to create comments in a PHP script, and <comment is not one of them. Answer: B.
6. The n escape character in PHP renders a linefeed. Answer: A.
7. The global configuration file is php.ini.
8. The command $AU++; increments the variable by one – changing it from 7 to 8. Answer: A.
9. The printf type specifier f is used for a floating point value. Answer: B.
10. The PHP logical operator to use to see if both a and b are true would be a && b. Answer: B.
11. The first entry is 0, the second is 1, and the numbers increment from there. Answer: D.
12. The srand() function must be called to send the random number generator before array_rand(). Answer: C.
13. The default order resulting from a sort utilizing asort() is alphabetic (A-Z) and lowest to highest (0-9). Answer: A and C.
14. Variable names cannot begin with a numeric character. Answer: B.
15. The opening tag used by PHP is <?php. Answer: A.
16. Curly braces are used to separate blocks of statements within a control structure. Answer: C.
17. The settype function can be used to assign a data type to a variable. Answer: C.
18. The REMOTE_ADDR HTTP variable contains the IP address of the machine making a request. Answer: D.
19. The POST method should be used for a form as described. Answer: A.
20. If the result is not a whole number, it is assigned the double data type If it is a whole number, integer is assigned. Answer: B.
