PHP online test, practice interview questions and answers

1.

Which function is used to remove duplicate values from an array in PHP?

array_unique()

array_keys()

array_values()

2.

Interfaces can have private access modifier for abstract method?

True

False

3.

Interface helps in the following?

Multiple inheritance

Single inheritance

Multilevel inheritance

Abstraction

4.

Which of the following statement is wrong related to abstract class?

Can support multiple inheritance

Can have concrete methods

Can not support multiple inheritance

Can have abstract methods

5.

Which one is true related with Header()?

Header is used to clear the cache

Header is used to redirect

Header is used to load the header part

All of the above

6.

Which one will print true?

 var_dump(0123 == 123);
 var_dump('0123' == 123);
 var_dump('0123' === 123);

None

1

3

2

7.

What will be the output of the code snippet?

 $a = '90';
 $b = &$a;
 $b = "2$b";
 echo $b;

290

Generates an error

180

2

8.

What is the use of implode function in PHP?

Converts string to array

Converts array to string

9.

What is the use of break method in PHP?

Exit from the function

Stop execution

Halt the remaining part

Exit from the loop

10.

What is the use of explode function in PHP?

Converts string to array

Converts array to string