PHP programs for printing pyramid patterns

PHP
PHP programs for printing pyramid patterns

This article is aimed at giving a PHP implementation for pattern printing.

Simple Pyramid Pattern

Time Complexity: The time complexity of this algorithm is O(N^2) where N is the number of rows.

Space Complexity: The space complexity of this algorithm is O(1) because only a fixed amount of memory is used.

<?php
for ($i = 0; $i <= 5; $i++) {
    for ($j = 1; $j <= $i; $j++) {
        echo "* ";
    }
    echo "<br>";
}
?>

Output:-

PHP programs for printing pyramid patterns

Pattern 1

<?php
for ($i = 0; $i <= 5; $i++) {
    for ($j = 5 - $i; $j >= 1; $j--) {
        echo "* ";
    }
    echo "<br>";
}
?>

Pattern 2

<?php  
for($i=0;$i<=5;$i++){  
for($k=5;$k>=$i;$k--){  
echo "  ";  
}  
for($j=1;$j<=$i;$j++){  
echo "*  ";  
}  
echo "<br>";  
}  
for($i=4;$i>=1;$i--){  
for($k=5;$k>=$i;$k--){  
echo "  ";  
}  
for($j=1;$j<=$i;$j++){  
echo "*  ";  
}  
echo "<br>";  
}  
?>

Pattern 3

<?php  
for ($i=1; $i<=5; $i++)  
{  
 for ($j=1; $j<=5; $j++)  
  {  
   echo '* ';  
  }  
   echo "</br>";  
}  
?>

Pattern 4

<?php 
// printing pattern of numbers 
// printing pattern
function numpat($n)
{

// initializing starting number
$num = 1;

// outer loop to handle
// number of rows
// n in this case
for ($i = 0; $i < $n; $i++)
{

// inner loop to handle
// number of columns
// values changing acc. 
// to outer loop
for ($j = 0; $j <= $i; $j++ )
{
	
// printing number
echo $num." ";
}

// incrementing number
// at each column
$num = $num + 1;

// ending line after
// each row
echo "<br>";
}
}
// Driver Code
$n = 5;
numpat($n);

?>

Pattern 5

<?php 
// printing pattern of numbers
// Numbers without re assigning
function numpat($n)
{

// initialising starting
// number
$num = 1;

// outer loop to handle 
// number of rows
// n in this case
for ($i = 0; $i < $n; $i++)
{

// inner loop to handle 
// number of columns
// values changing acc.
// to outer loop
for ($j = 0; $j <= $i; $j++ )
{
	
// printing number
echo $num." ";

// incrementing number 
// at each column
$num = $num + 1;
}

// ending line after
// each row
echo "<br>";
}
}

// Driver Code
$n = 5;
numpat($n);

?>

Pattern 6

<?php
// pattern of alphabets
// printing pattern
function alphapat($n) {
// initializing value
// corresponding to 'A'
// ASCII value
    $num = 65;
    for ($i = 0; $i < $n; $i++) {
        for ($j = 0; $j <= $i; $j++) {
// explicitly converting
// to char
            $ch = chr($num);

// printing char value
            echo $ch . " ";
        }
// incrementing number
        $num = $num + 1;
// each row
        echo "<br>";
    }
}
// Driver Code
$n = 5;
alphapat($n);
?>

Pattern 7

<?php
// PHP code to demonstrate printing
// pattern of alphabets

// Function to demonstrate
// printing pattern
function contalpha($n)
{

// initializing value
// corresponding to 'A'
// ASCII value
$num = 65;

// outer loop to handle
// number of rows
// n in this case
for ($i = 0; $i < $n; $i++)
{

// inner loop to handle
// number of columns
// values changing acc. 
// to outer loop
for ($j = 0; $j <= $i; $j++ )
{
	
// explicitly converting
// to char
$ch = chr($num);

// printing char value
echo $ch." ";

// incrementing number 
// at each column
$num = $num + 1;
}

// ending line after each row
echo "<br>";
}
}

// Driver Code
$n = 5;
contalpha($n);

?>
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