Best 20+ multiple-choice questions (MCQs) on PHP Data Types and related topics. The questions are designed to test your knowledge and understanding of PHP data types, operators, and their behaviors. Each question is followed by four options and the correct answer is highlighted for each question. This content is useful for anyone who wants to test their knowledge of PHP data types or prepare for PHP certification exams.
Question 1: What is the output of the following PHP code snippet?
$var1 = "hello";
$var2 = 5;
echo gettype($var1) . " " . gettype($var2);
- string integer
- integer string
- string string
- integer integer
Question 2: What is the data type of the value returned by the PHP function strpos()?
- integer
- string
- array
- boolean
Question 3: What is the output of the following PHP code snippet?
$var1 = 2;
$var2 = "2";
echo $var1 + $var2;
- 22
- 4
- 0
- 2
Answer: b) 4
Question 4: Which of the following is not a PHP data type?
- boolean
- integer
- float
- character
Answer: d) character
Question 5: What is the output of the following PHP code snippet?
$var1 = true;
$var2 = false;
echo gettype($var1) . " " . gettype($var2);
- boolean boolean
- integer integer
- string string
- boolean integer
Answer: a) boolean boolean
Question 6: Which of the following is not a PHP scalar data type?
- boolean
- float
- array
- string
Answer: c) array
Question 7: What is the output of the following PHP code snippet?
$var1 = 10;
$var2 = "10";
if ($var1 === $var2) {
echo "Equal";
} else {
echo "Not Equal";
}
- Equal
- Not Equal
- 10
- Error
Answer: b) Not Equal
Question 8: Which of the following data types is used to store a collection of key-value pairs in PHP?
- integer
- float
- boolean
- array
Answer: d) array
Question 9: What is the output of the following PHP code snippet?
$str = "123abc";
$num = (int) $str;
echo gettype($num) . " " . $num;
- string 123abc
- integer 123
- string 123
- integer 123abc
Answer: b) integer 123
Question 10: Which of the following data types is used to represent a null value in PHP?
- boolean
- integer
- null
- string
Answer: c) null
Question 11: What is the output of the following PHP code snippet?
$str1 = "hello";
$str2 = "world";
echo $str1 . " " . $str2;
- hello world
- helloworld
- "hello" "world"
- "helloworld"
Answer: a) hello world
Question 12: Which of the following data types is used to store a sequence of characters in PHP?
- integer
- boolean
- string
- array
Answer: c) string
Question 13: What is the output of the following PHP code snippet?
$var1 = "10";
$var2 = "20";
echo $var1 + $var2;
- 30
- 1020
- 0
- NaN
Answer: b) 1020
Question 14: Which of the following data types is used to represent a list of ordered items in PHP?
- string
- integer
- array
- null
Answer: c) array
Question 15: What is the output of the following PHP code snippet?
$var1 = true;
$var2 = "false";
if ($var1 && !$var2) {
echo "True";
} else {
echo "False";
}
- True
- False
- Nothing is outputted
- Error
Answer: a) True
Question 16: Which of the following is a PHP non-scalar data type?
- string
- float
- boolean
- object
Answer: d) object
Question 17: What is the output of the following PHP code snippet?
$arr = array("apple", "banana", "cherry");
echo count($arr);
- apple, banana, cherry
- 3
- 6
- Error
Answer: b) 3
Question 18: Which of the following data types is used to store a boolean value in PHP?
- integer
- float
- boolean
- string
Answer: c) boolean
Question 19: What is the output of the following PHP code snippet?
$x = 5;
echo ++$x;
- 6
- 5
- 11
- Error
Answer: a) 6
Question 20: Which of the following data types is used to store large numbers with decimals in PHP?
- boolean
- integer
- string
- float
Answer: d) float
Question 21: Which of the following operators is used for concatenating two strings in PHP?
- *
- /
- –
- .
Answer: d) .
Question 22: What is the output of the following PHP code snippet?
$x = 10;
echo ++$x + $x++;
- 20
- 21
- 22
- 11
Answer: b) 21
Question 23: Which of the following data types is used to represent nothing in PHP?
- boolean
- string
- integer
- null
Answer: d) null
Question 24: What is the output of the following PHP code snippet?
$x = 10;
if ($x == "10") {
echo "Equal";
} else {
echo "Not equal";
}
- Equal
- Not equal
- Nothing is outputted
- Error
Answer: a) Equal
Question 25: Which of the following data types is used to store a single character in PHP?
- integer
- string
- boolean
- float
Answer: b) string
