1. What is the primary use of a switch statement in PHP?
Answer:
Explanation:
A switch statement is used to perform different actions based on different conditions.
2. How does a switch statement compare its expression to the case values in PHP?
Answer:
Explanation:
A switch statement uses loose comparison (==) to compare its expression with the case values.
3. What keyword is used to terminate a case in a switch statement in PHP?
Answer:
Explanation:
The break keyword is used to terminate a case in a switch statement.
4. Which of the following is the correct syntax of a switch statement in PHP?
Answer:
Explanation:
The correct syntax for a switch statement in PHP is switch (variable) { case 'value': … }
5. What is the purpose of the default case in a switch statement in PHP?
Answer:
Explanation:
The default case in a switch statement is executed if no case value matches the switch expression.
6. Can a switch statement in PHP work with integer values?
Answer:
Explanation:
A switch statement in PHP can work with integer values, as well as strings.
7. What happens if the break statement is omitted in a case of a switch statement?
Answer:
Explanation:
If the break statement is omitted, PHP will continue executing the next case (fall-through behavior).
8. Is it possible to have multiple cases with the same code block in a switch statement in PHP?
Answer:
Explanation:
It is possible to have multiple cases share the same code block by stacking them before using a break.
9. How do you match multiple values in a single case in a switch statement in PHP?
Answer:
Explanation:
Multiple values can be matched in a single case by stacking case statements before a break.
10. Can a switch statement in PHP handle floating-point numbers?
Answer:
Explanation:
It's not recommended to use floating-point numbers in switch statements due to potential precision issues.
11. What is the output of the following code if $var = 10; switch ($var) { case 10: echo 'Ten'; break; default: echo 'Not ten'; }?
Answer:
Explanation:
Since $var matches the case value 10, 'Ten' will be outputted.
12. Is the expression in a switch statement in PHP limited to only variables?
Answer:
Explanation:
The expression in a switch statement can be any expression that evaluates to a value, not just variables.
13. How is a switch statement different from an if…else statement in PHP?
Answer:
Explanation:
A switch statement is used for equality comparison against multiple values, while if…else can evaluate a wider range of conditions.
14. Can the cases in a switch statement be expressions in PHP?
Answer:
Explanation:
The cases in a switch statement can be expressions that are evaluated at run time.
15. Is it mandatory to have a default case in a switch statement in PHP?
Answer:
Explanation:
The default case in a switch statement is optional and is used to capture any cases not specifically handled by other case statements.