1. Which of the following is used to output one or more strings in PHP?
Answer:
Explanation:
Both echo and print are used to output strings in PHP.
2. What is the main difference between echo and print?
Answer:
Explanation:
echo can accept multiple arguments whereas print can only handle one, and print always returns 1, unlike echo.
3. How do you output a variable and a string together using echo?
Answer:
Explanation:
The . operator is used for string concatenation in PHP.
4. Which of the following is a correct way to use echo?
Answer:
Explanation:
echo can be used with or without parentheses.
5. What is the correct way to output HTML tags using print?
Answer:
Explanation:
print can output HTML tags either directly or within parentheses.
6. How can you output multiple strings using echo?
Answer:
Explanation:
echo can take multiple parameters separated by commas to output strings consecutively.
7. What is the output of print('Hello' . ' ' . 'World')?
Answer:
Explanation:
The . operator concatenates strings, and print outputs the concatenated string.
8. Which statement is true about echo and print?
Answer:
Explanation:
print returns a value, so it can be used in expressions, unlike echo.
9. What will the following PHP code output: echo 10 + 20;
Answer:
Explanation:
echo outputs the result of the arithmetic operation, which is 30 in this case.
10. Which of the following is a valid use of print in PHP?
Answer:
Explanation:
print can be used in this way and will assign the value 1 to $result.
11. Can echo be used to output the value of an array directly?
Answer:
Explanation:
echo cannot output array values directly; it only works with strings and numbers.
12. What is the output of the following code: print "Hello" . "World";
Answer:
Explanation:
The . operator concatenates the strings without adding any space.
13. How can you output a newline character using echo?
Answer:
Explanation:
In double-quoted strings, \n represents a newline character.
14. What is the result of using print in a ternary operator like this: $result = (true ? print "Yes" : print "No");
Answer:
Explanation:
The ternary operation evaluates to true, so print "Yes" is executed.
15. Can echo and print be used interchangeably without affecting the output?
Answer:
Explanation:
In simple strings without the need for a return value or multiple arguments, echo and print can often be used interchangeably.