Learn how to print a Right Half Pyramid pattern in PHP 2026 | Best Tutorial

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⭐ Right Half Pyramid Pattern

Aapko N rows ka ek Right Half Star Pyramid banana hai.

  • Row 1 → *
  • Row 2 → **
  • Row 3 → ***
  • …
  • Row N → *****... (N stars)

Is pattern mein stars left side se align hote hain.

<?php

// Yaha par hum N ki value set kar rahe hain
$N = 5;

// Outer loop rows ko control karta hai
for ($i = 1; $i <= $N; $i++) {

    // Inner loop har row me stars print karega
    for ($j = 1; $j <= $i; $j++) {
        echo "*";
    }

    // Har row ke baad next line
    echo "\n";
}

?>
PHP

Explanation (Line-by-Line):

✅ $N = 5;

Yeh bata raha hai ki hume 5 rows ka pattern banana hai.

✅ for ($i = 1; $i <= $N; $i++)

  • Yeh outer loop hai.
  • i represent karta hai row number.
  • Jab i = 1 hoga → row 1
  • Jab i = 2 hoga → row 2
    Aur aise hi N tak chalega.

✅ for ($j = 1; $j <= $i; $j++)

  • Yeh inner loop hai jo stars print karega.
  • Har row me jitna i hoga utne hi stars print honge.

Example:

  • Row 1 → i = 1 → 1 star
  • Row 2 → i = 2 → 2 stars

✅ echo "\n";

Her row complete hone ke baad next line me chala jaata hai.

User Input + HTML

<!DOCTYPE html>
<html>
<head>
    <title>Right Half Star Pyramid in PHP</title>
</head>
<body>

<!-- User input form -->
<form method="post">
    <label>Enter number of rows (N):</label>
    <input type="number" name="rows" required>
    <button type="submit">Generate Pyramid</button>
</form>

<pre>
<?php
// Check agar form submit hua hai
if ($_SERVER["REQUEST_METHOD"] == "POST") {

    // User se N ki value lena
    $n = $_POST['rows'];

    // Right Half Pyramid banana
    for ($i = 1; $i <= $n; $i++) {

        // Har row me stars print karne ka loop
        for ($j = 1; $j <= $i; $j++) {
            echo "*";
        }

        // Next line
        echo "\n";
    }
}
?>
</pre>

</body>
</html>
PHP

1️⃣ User Input Form

  • User N enter karega (rows ki sankhya).
  • Form POST method se data PHP ko bhej raha hai.

2️⃣ PHP Code

  • Hum check karte hain ki form submit hua ya nahi:
if ($_SERVER["REQUEST_METHOD"] == "POST")
PHP

3️⃣ Stars Print Karna

  • Outer loop rows banata hai:
for ($i = 1; $i <= $n; $i++)
PHP
  • Inner loop stars print karta hai:
for ($j = 1; $j <= $i; $j++)
PHP

4️⃣ Output Example (N = 5)

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