PHP Basic Programs for Beginners

PHP Basic Programs for Beginners - Important Points

16.		What is the output of the following PHP code snippet? <?php $num1 = 10; $num2 = 5; $result = $num1 + $num2; echo "The result is " . $result; ?>

16.

What is the output of the following PHP code snippet?

<?php
$num1 = 10;
$num2 = 5;
$result = $num1 + $num2;
echo "The result is " . $result;
?>

A. The result is 10

B. The result is 5

C. The result is 15

D. None of the above

View Answer Discuss Work Space

Answer: option c

Explanation:

The code snippet adds two variables $num1 and $num2 and then displays the result using the echo statement, which is "The result is 15".

17.		Which of the following is the correct way to check if a variable is not null in PHP?

A. if ($myVar == null) { ... }

B. if ($myVar === null) { ... }

C. if ($myVar != null) { ... }

D. None of the above

View Answer Discuss Work Space

Answer: option b

Explanation:

The correct way to check if a variable is not null in PHP is by using the === operator, as shown in option B.

18.		What is the output of the following PHP code snippet? <?php $myString = "Hello, world!"; echo str_replace("Hello", "Hi", $myString); ?>

18.

What is the output of the following PHP code snippet?

<?php
$myString = "Hello, world!";
echo str_replace("Hello", "Hi", $myString);
?>

A. Hi, world!

B. Hello, world!

C. Hi

D. None of the above

View Answer Discuss Work Space

Answer: option a

Explanation:

The code snippet uses the str_replace() function to replace the word "Hello" with "Hi" in the $myString variable and then displays the modified string, which is "Hi, world!".

19.		Which of the following is the correct way to sort an array in ascending order in PHP?

A. sort($myArray, "ASC");

B. asort($myArray);

C. ksort($myArray);

D. None of the above

View Answer Discuss Work Space

Answer: option b

Explanation:

The correct way to sort an array in ascending order in PHP is by using the asort() function.

20.		What is the output of the following PHP code snippet? <?php $i = 1; do { echo $i; $i++; } while ($i <= 5); ?>

20.

What is the output of the following PHP code snippet?

<?php
$i = 1;
do {
echo $i;
$i++;
} while ($i <= 5);
?>

A. 12345

B. 54321

C. 1234

D. None of the above

View Answer Discuss Work Space

Answer: option a

Explanation:

The code snippet uses the do-while loop to display the numbers from 1 to 5, which are "12345".

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