PHP Exercises: Capture a variable number of arguments to a given function

PHP: Exercise-102 with Solution

Write a PHP program to capture a variable number of arguments to a given function.

Sample Solution:

PHP Code:

<?php
// Licence: https://bit.ly/2CFA5XY

// Function definition for 'variadicFunction' that takes an array of operands as a parameter
function variadicFunction($operands)
{
    // Initialize a variable to store the sum of operands
    $sum = 0;

    // Iterate through each operand in the array and add it to the sum
    foreach($operands as $singleOperand) {
        $sum += $singleOperand;
    }

    // Return the final sum
    return $sum;
}

// Call 'variadicFunction' with an array containing two operands and display the result using 'var_dump'
var_dump(variadicFunction([1, 2]));

// Call 'variadicFunction' with an array containing four operands and display the result using 'var_dump'
var_dump(variadicFunction([1, 2, 3, 4]));
  
?>

Explanation:

• Function Definition:
• The variadicFunction is defined to take a single parameter $operands, which is expected to be an array of numbers.
• Variable Initialization:
• A variable $sum is initialized to 0 to hold the cumulative sum of the operands.
• Iterate Over Operands:
• A foreach loop iterates through each element in the $operands array.
• Each element (referred to as $singleOperand) is added to the $sum.
• Return Sum:
• After the loop completes, the function returns the total sum of the operands.
• First Function Call:
• The function is called with an array containing two elements [1, 2].
• The result is displayed using var_dump, which outputs int(3).
• Second Function Call:
• The function is called again with an array containing four elements [1, 2, 3, 4].
• The result is displayed using var_dump, which outputs int(10).

Output:

int(3)
int(10)

Flowchart:

PHP Code Editor:

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