Butterfly pattern in PHP of the numbers by using the for loop

In this article, you will learn how to print the butterfly pattern in the PHP programming language of the numbers using the for loop statement.

Example

You should have knowledge of the following topics in PHP programming to understand this program:

• PHP for loop statement

In this program, we used normal functions and statements to print the butterfly pattern.

Source Code

<?php
// Butterfly pattern in PHP of the numbers by using the for loop

// Size of the butterfly pattern
$h = 7;

echo "This the butterfly pattern:\n\n";

// This will print the butterfly pattern
butterflyPattern($h);

// It's the function to
// print the butterfly pattern
function butterflyPattern($h) {
	for($r = 1; $r <= $h - 1; $r++) {
        echo "\t";
        for($d = 1; $d <= $r; $d++)
            echo $d . " ";
        for($s = 1; $s <= 2 * ($h - $r); $s++)
            echo "  ";
        for($d = $r; $d >= 1; $d--)
            echo $d . " ";
        echo "\n";
    }

    for($r = $h; $r >= 1; $r--) {
        echo "\t";
        for($d = 1; $d <= $r; $d++)
            echo $d . " ";
        for($s = 1; $s <= 2 * ($h - $r); $s++)
            echo "  ";
        for($d = $r; $d >= 1; $d--)
            echo $d . " ";
        echo "\n";
    }
}

?>

Output

Explanation

In this program, we have made the calculation using the for loop statement.