Program for Patterns

Alphabet Triangle using PHP method
A
ABA
ABCBA
ABCDCBA
ABCDEDCBA

    <?php
    function printPattern($rows) {
        for ($i = 1; $i <= $rows; $i++) {
            // Print spaces
            for ($space = 1; $space <= $rows - $i; $space++) {
                echo " ";
            }

            // Print characters in ascending order
            for ($j = 0; $j < $i; $j++) {
                echo chr(65 + $j);
            }

            // Print characters in descending order
            for ($j = $i - 2; $j >= 0; $j--) {
                echo chr(65 + $j);
            }

            echo "\n";
        }
    }

    $rows = 5; // Number of rows for the pattern
    printPattern($rows);
    ?>

Number Triangle:
1
1 2
1 2 3
1 2 3 4
1 2 3 4 5

<?php
function printNumberTriangle($rows) {
    for ($i = 1; $i <= $rows; $i++) {
        // Print numbers
        for ($j = 1; $j <= $i; $j++) {
            echo $j . " ";
        }

        echo "\n";
    }
}

$rows = 5; // Number of rows for the triangle pattern
printNumberTriangle($rows);
?>

Upward-Pointing Star Triangle:

    *
   ***
  *****
 *******
*********

  

<?php
function printUpwardStarTriangle($rows) {
    for ($i = 1; $i <= $rows; $i++) {
        // Print spaces
        for ($space = 1; $space <= $rows - $i; $space++) {
            echo " ";
        }

        // Print stars
        for ($j = 1; $j <= 2 * $i - 1; $j++) {
            echo "*";
        }

        echo "\n";
    }
}

$rows = 5; // Number of rows for the upward-pointing star triangle
printUpwardStarTriangle($rows);
?>

Downward-Pointing Star Triangle:

*********

*******

*****

***

*

<?php
function printDownwardStarTriangle($rows) {
for ($i = $rows; $i >= 1; $i–) {
// Print spaces
for ($space = 1; $space <= $rows – $i; $space++) {
echo ” “;
}

// Print stars
for ($j = 1; $j <= 2 * $i – 1; $j++) {
echo “*”;
}

echo “\n”;
}
}

$rows = 5; // Number of rows for the downward-pointing star triangle
printDownwardStarTriangle($rows);
?>