PHP Level 2, Regular Expressions

6 Questions | By Johnkawakami | Updated: Dec 12, 2022 | Attempts: 2031

Questions

Settings

This quiz is a test of basic PCRE, aka, preg_match(). Difficult concepts in regexes are not covered. Passing the test indicates that you have a basic understanding of regexes.

Questions and Answers

1.

In the following statement, what does the "+" symbol mean?preg_match('/^[0-9]+$/', $data)
- A.
  
  Any character
- B.
  
  One character between 0 and 9
- C.
  
  One or more characters between 0 and 9
- D.
  
  Zero or more characters between 0 and 9
- E.
  
  Any character between 0 and 9 followed by a $
2.

What would match the regex in the following statement:preg_match('/^[0-9]{3}-[0-9]{2,4}$/', $data)
- A.
  
  98090
- B.
  
  213-99
- C.
  
  415
- D.
  
  1-2345
- E.
  
  5-99
3.

Rank these three function in the order of their typical speed, slowest to fastest: preg_match(), strpos(), ereg().
- A.
  
  Preg_match, strpos, ereg
- B.
  
  Ereg, preg_match, strpos
- C.
  
  Ereg, strpos, preg_match
- D.
  
  Preg_match, ereg, strpos
4.

How long is the shortest string that would match this regex:preg_match('/^[a-z]+[0-9]*[A-Z]{2,10}$/')
- A.
  
  0 characters (empty string)
- B.
  
  1 character
- C.
  
  2 characters
- D.
  
  3 characters
- E.
  
  4 characters
5.

What is the value of $matches[1]?preg_match('/([0-9]{3})-([0-9]{3})-([0-9]{4})/', "TEL 323-555-1212", $matches);
- A.
  
  TEL
- B.
  
  323
- C.
  
  555
- D.
  
  1212
6.

Which of the following is NOT a typical use for regular expressions in PHP.
- A.
  
  Validating input data
- B.
  
  Dividing input text into substrings.
- C.
  
  Converting hexadecimal into decimal.
- D.
  
  Replacing strings with other strings.