PHP REGULAR EXPRESSIONS QUIZ

What will be the output of the following PHP code? echo str_pad("Salad", 5)." is good.";

is good SaladSaladSaladSaladSalad

is good Salad

Salad is good

SaladSaladSaladSaladSalad is good

TRUE ANSWER : ?
YOUR ANSWER : ?

[:alpha:] can also be specified as.

[A-za-z]

[a-z]

[A-Za-z0-9]

[A-z]

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Array ( [1] => steak )

Array ( [0] => potatoes )

Array ( [0] => pasta [1] => steak [2] => fish [3] => potatoes )

Array ( [3] => potatoes )

TRUE ANSWER : ?
YOUR ANSWER : ?

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

7

8

10

9

TRUE ANSWER : ?
YOUR ANSWER : ?

Which one of the following functions can be used to concatenate array elements to form a single delimited string?

explode()

concatenate()

implode()

concat()

TRUE ANSWER : ?
YOUR ANSWER : ?

Which one of the following is not a preg PHP function?

preg_matchall

preg_match_all

preg_split

preg_match

TRUE ANSWER : ?
YOUR ANSWER : ?

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

3 and 4

None of the mentioned

All of the mentioned

1 and 2

TRUE ANSWER : ?
YOUR ANSWER : ?

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

1, 3 and 4

1 and 4

Only 1

2 and 3

TRUE ANSWER : ?
YOUR ANSWER : ?

Which one of the following preg PHP function is used to do a find and replace on a string or an array?

preg_replace()

preg_find()

preg_findre()

preg_find_replace()

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Username must be all lowercase!

Error

Username is all lowercase!

No Output is returned

TRUE ANSWER : ?
YOUR ANSWER : ?

What will be the output of the following PHP code?<br/>echo str_pad("Salad", 5)." is good.";

[:alpha:] can also be specified as.

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

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

Which one of the following functions can be used to concatenate array elements to form a single delimited string?

Which one of the following is not a preg PHP function?

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

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

Which one of the following preg PHP function is used to do a find and replace on a string or an array?

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