PHP Interview Questions

Laravel Interview Questions

MySQL Interview Questions

How do you define an array in PHP?

  • A) $myArray = array();
  • B) $myArray = [];
  • C) Both A and B
  • D) $myArray = new Array();
Show Answer 
Correct Answer: C - Both A and B

What is the correct way to comment in PHP?

  • A) // This is a comment
  • B) /* This is a comment */
  • C) # This is a comment
  • D) All of the above
Show Answer 
Correct Answer: D - All of the above

What is the output of the following code: echo 5 + '10';?

  • A) 15
  • B) 510
  • C) 5 + 10
  • D) Error
Show Answer 
Correct Answer: A - 15

What is the output of the following PHP code: echo 5 + '10';?

  • A) 15
  • B) 510
  • C) 5 + 10
  • D) Error
Show Answer 
Correct Answer: A - 15

What is the correct way to create an array in PHP?

  • A) array[] = 'value';
  • B) $array = array('value1', 'value2');
  • C) $array = new array('value1', 'value2');
  • D) array('value1', 'value2') = $array;
Show Answer 
Correct Answer: B - $array = array('value1', 'value2');

What is the purpose of the 'echo' statement in PHP?

  • A) To output data to the screen
  • B) To create a variable
  • C) To include a file
  • D) To define a function
Show Answer 
Correct Answer: A - To output data to the screen

Which of the following is a correct way to start a PHP block?

  • A) <php>
  • B) <?php
  • C) <PHP>
  • D) <?PHP
Show Answer 
Correct Answer: B - <?php

How do you create an array in PHP?

  • A) array[] = value;
  • B) array(value);
  • C) $array = array();
  • D) $array[] = value;
Show Answer 
Correct Answer: C - $array = array();

Which of the following is the correct way to define a constant in PHP?

  • A) define('MY_CONSTANT', 'value');
  • B) const MY_CONSTANT = 'value';
  • C) Both A and B
  • D) constant MY_CONSTANT = 'value';
Show Answer 
Correct Answer: C - Both A and B

Which superglobal array is used to collect form data in PHP?

  • A) $_GET
  • B) $_POST
  • C) $_REQUEST
  • D) All of the above
Show Answer 
Correct Answer: D - All of the above

Which of the following is used to concatenate strings in PHP?

  • A) +
  • B) .
  • C) &
  • D) ,
Show Answer 
Correct Answer: B - .

What is the correct way to start a session in PHP?

  • A) session_start();
  • B) start_session();
  • C) begin_session();
  • D) initiate_session();
Show Answer 
Correct Answer: A - session_start();

How do you access a value from an associative array in PHP?

  • A) $array['key'];
  • B) $array.key;
  • C) $array.key();
  • D) $array->key;
Show Answer 
Correct Answer: A - $array['key'];

Which of the following is a valid way to declare a variable in PHP?

  • A) var $variable_name;
  • B) $variable_name = value;
  • C) variable_name = $value;
  • D) declare variable_name as $value;
Show Answer 
Correct Answer: B - $variable_name = value;

What function is used to include a file in PHP?

  • A) include_file()
  • B) require()
  • C) include()
  • D) import()
Show Answer 
Correct Answer: C - include()

Which of the following is a correct way to declare a variable in PHP?

  • A) var $variable_name;
  • B) $variable_name = value;
  • C) variable_name = $value;
  • D) declare $variable_name = value;
Show Answer 
Correct Answer: B - $variable_name = value;

How do you create a comment in PHP?

  • A) // This is a comment
  • B) /* This is a comment */
  • C) # This is a comment
  • D) All of the above
Show Answer 
Correct Answer: D - All of the above

What is the correct way to declare a variable in PHP?

  • A) var $variable_name;
  • B) $variable_name;
  • C) variable $variable_name;
  • D) declare $variable_name;
Show Answer 
Correct Answer: B - $variable_name;

Which of the following is used to get the length of a string in PHP?

  • A) strlen()
  • B) str_length()
  • C) length()
  • D) count()
Show Answer 
Correct Answer: A - strlen()

What does PHP stand for?

  • A) Personal Hypertext Processor
  • B) PHP: Hypertext Preprocessor
  • C) Private Home Page
  • D) Public Hypertext Processor
Show Answer 
Correct Answer: B - PHP: Hypertext Preprocessor

Which function is used to include a file in PHP?

  • A) include_file()
  • B) require()
  • C) include()
  • D) import()
Show Answer 
Correct Answer: C - include()

What is the correct way to start a PHP block?

  • A) <php>
  • B) <?php>
  • C) <script>
  • D) <PHP>
Show Answer 
Correct Answer: B - <?php>

Which of the following is a valid PHP array?

  • A) $array = array(1, 2, 3);
  • B) $array = [1, 2, 3];
  • C) Both A and B
  • D) $array = (1, 2, 3);
Show Answer 
Correct Answer: C - Both A and B

Which of the following is used to connect to a MySQL database in PHP?

  • A) mysql_connect()
  • B) db_connect()
  • C) connect_mysql()
  • D) mysqli_connect()
Show Answer 
Correct Answer: D - mysqli_connect()

Which of the following is a superglobal variable in PHP?

  • A) $_GET
  • B) $_POST
  • C) $_SESSION
  • D) All of the above
Show Answer 
Correct Answer: D - All of the above

Which of the following is used to comment in PHP?

  • A) // comment
  • B) # comment
  • C) /* comment */
  • D) All of the above
Show Answer 
Correct Answer: D - All of the above

How do you define a constant in PHP?

  • A) define('CONSTANT_NAME', value);
  • B) constant('CONSTANT_NAME', value);
  • C) const CONSTANT_NAME = value;
  • D) constant_name = value;
Show Answer 
Correct Answer: A - define('CONSTANT_NAME', value);

What is the purpose of the 'return' statement in a function?

  • A) To end the script
  • B) To return a value from the function
  • C) To call another function
  • D) To define a function
Show Answer 
Correct Answer: B - To return a value from the function

Which of the following is a valid comment in PHP?

  • A) // This is a comment
  • B) /* This is a comment */
  • C) # This is a comment
  • D) All of the above
Show Answer 
Correct Answer: D - All of the above

Which of the following is a valid PHP function to get the length of a string?

  • A) strlen()
  • B) length()
  • C) str_length()
  • D) getLength()
Show Answer 
Correct Answer: A - strlen()

Which of the following is the correct way to start a PHP block?

  • A) <php>
  • B) <?php>
  • C) <script language='php'>
  • D) <PHP>
Show Answer 
Correct Answer: B - <?php>

Which of the following is used to declare a variable in PHP?

  • A) var
  • B) let
  • C) $
  • D) #
Show Answer 
Correct Answer: C - $

Which symbol is used to denote a variable in PHP?

  • A) @
  • B) #
  • C) $
  • D) &
Show Answer 
Correct Answer: C - $

Which operator is used for string concatenation in PHP?

  • A) +
  • B) .
  • C) &
  • D) *
Show Answer 
Correct Answer: B - .

How do you comment in PHP?

  • A) // This is a comment
  • B) /* This is a comment */
  • C) # This is a comment
  • D) All of the above
Show Answer 
Correct Answer: D - All of the above