1. What is the basic structure for an if statement in PHP?
a) if (condition) { code to be executed; }
b) if condition { code to be executed; }
c) if (condition) execute code;
d) if: condition { code to be executed; }
Answer:
a) if (condition) { code to be executed; }
Explanation:
The correct syntax for an if statement in PHP is if (condition) { code to be executed; }
2. How do you execute some code if the 'if' condition is false in PHP?
a) Using an else statement
b) Using another if statement
c) Using a while statement
d) No need to execute code
Answer:
a) Using an else statement
Explanation:
An else statement is used to execute code when the 'if' condition is false.
3. What is the correct syntax for adding multiple conditions in an if statement in PHP?
a) if (condition1 && condition2) { code to be executed; }
b) if condition1 and condition2 { code to be executed; }
c) if (condition1) and (condition2) { code to be executed; }
d) if (condition1, condition2) { code to be executed; }
Answer:
a) if (condition1 && condition2) { code to be executed; }
Explanation:
Logical AND (&&) is used to combine multiple conditions in an if statement.
4. What is the purpose of the elseif statement in PHP?
a) To specify a new condition to test, if the first condition is false
b) To stop the script
c) To create a loop
d) To check the same condition again
Answer:
a) To specify a new condition to test, if the first condition is false
Explanation:
The elseif statement is used to specify a new condition if the first condition is false.
5. What happens if the condition in an if statement in PHP is true?
a) The script stops executing
b) The code inside the if block does not execute
c) The code inside the if block executes
d) The code inside the else block executes
Answer:
c) The code inside the if block executes
Explanation:
When the condition in an if statement is true, the code inside the if block executes.
6. How many elseif statements can you have in a single if…else structure in PHP?
a) Only one
b) As many as you want
c) Two
d) None
Answer:
b) As many as you want
Explanation:
You can have as many elseif statements as you want in a single if…else structure.
7. What is the correct way to write an if statement without curly braces in PHP?
a) if (condition) execute code;
b) if condition: execute code;
c) if (condition) execute code endif;
d) if condition execute code
Answer:
a) if (condition) execute code;
Explanation:
In PHP, if the if statement has only one line of code to be executed, curly braces can be omitted.
8. How do you execute different code for more than two conditions in PHP?
a) Using multiple if statements
b) Using if and else
c) Using if, else, and elseif
d) Using a switch statement
Answer:
c) Using if, else, and elseif
Explanation:
The if, else, and elseif statements are used to execute different code blocks for more than two conditions.
9. Can an else statement exist without a preceding if statement in PHP?
a) Yes
b) No
c) Only in a loop
d) Only in a function
Answer:
b) No
Explanation:
An else statement must always be preceded by an if statement.
10. What is the output of this PHP code? if (false) { echo "True"; } else { echo "False"; }
a) True
b) False
c) Error
d) Nothing
Answer:
b) False
Explanation:
Since the condition is false, the else block will be executed, outputting "False".
11. Which operator is commonly used inside an if condition to compare two values in PHP?
a) =
b) ==
c) ===
d) !=
Answer:
b) ==
Explanation:
The == operator is commonly used for equality comparison in an if condition.
12. What is the correct syntax for an if…elseif…else statement in PHP?
a) if (condition) { code1; } elseif (condition) { code2; } else { code3; }
b) if (condition) { code1; } else if (condition) { code2; } else { code3; }
c) Both a) and b)
d) if (condition) then { code1; } elseif (condition) then { code2; } else { code3; }
Answer:
c) Both a) and b)
Explanation:
Both syntaxes are correct for writing if…elseif…else statements in PHP.
13. In which case would you use an else statement in PHP?
a) When you want to execute code regardless of the outcome of the if condition
b) When you want to execute code only if the if condition is true
c) When you want to execute code only if the if condition is false
d) When you have multiple conditions to check
Answer:
c) When you want to execute code only if the if condition is false
Explanation:
An else statement is used to execute code only when the if condition evaluates to false.
14. Is it mandatory to use an else statement with every if statement in PHP?
a) Yes
b) No
c) Depends on the PHP version
d) Only in certain cases
Answer:
b) No
Explanation:
It is not mandatory to use an else statement with every if statement. It's used when you need to execute code if the if condition is false.
15. What does the following PHP code do? if ($x > 10) { echo "Greater"; } elseif ($x == 10) { echo "Equal"; } else { echo "Smaller"; }
a) Prints "Greater" if $x is greater than 10, "Equal" if $x is 10, otherwise "Smaller"
b) Always prints "Greater"
c) Always prints "Smaller"
d) Results in an error
Answer:
a) Prints "Greater" if $x is greater than 10, "Equal" if $x is 10, otherwise "Smaller"
Explanation:
The code checks three conditions using if, elseif, and else, and executes different code based on which condition is true.