PHP Basic Programs for Beginners

PHP Basic Programs for Beginners - Important Points

21.		Which of the following is the correct way to check if a string contains a specific substring in PHP?

A. if (strpos($myString, "world") !== false) { ... }

B. if (substr($myString, "world") !== false) { ... }

C. if ($myString contains "world") { ... }

D. None of the above

View Answer Discuss Work Space

Answer: option a

Explanation:

The correct way to check if a string contains a specific substring in PHP is by using the strpos() function and checking if it returns a value that is not false.

22.		What is the output of the following PHP code snippet? <?php $myArray = array("red", "green", "blue"); echo count($myArray); ?>

22.

What is the output of the following PHP code snippet?

<?php
$myArray = array("red", "green", "blue");
echo count($myArray);
?>

A. 3

B. red, green, blue

C. Array

D. None of the above

View Answer Discuss Work Space

Answer: option a

Explanation:

The code snippet creates an array with three elements and then uses the count() function to display the number of elements in the array, which is 3.

23.		Which of the following is the correct way to declare a constant in PHP?

A. define("PI", 3.14);

B. const PI = 3.14;

C. PI = 3.14;

D. None of the above

View Answer Discuss Work Space

Answer: option a

Explanation:

The correct way to declare a constant in PHP is by using the define() function, as shown in option A.

24.		What is the output of the following PHP code snippet? <?php $myVar = true; if ($myVar) { echo "The variable is true"; } else { echo "The variable is false"; } ?>

24.

What is the output of the following PHP code snippet?

<?php
$myVar = true;
if ($myVar) {
echo "The variable is true";
} else {
echo "The variable is false";
}
?>

A. The variable is true

B. The variable is false

C. 1

D. None of the above

View Answer Discuss Work Space

Answer: option a

Explanation:

The code snippet sets the $myVar variable to true and then uses an if-else statement to display "The variable is true" if $myVar is true, which it is in this case.

25.		Which of the following is the correct way to create a multidimensional array in PHP?

A. $myArray = array("red", array("green", "blue"), "yellow");

B. $myArray = array("red", "green", "blue", "yellow");

C. $myArray = array(array("red", "green"), array("blue", "yellow"));

D. None of the above

View Answer Discuss Work Space

Answer: option a

Explanation:

The correct way to create a multidimensional array in PHP is by nesting arrays inside arrays, as shown in option A.

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