Example: Print Hollow Diamond Pattern in PHP

<?php
// Print Hollow Diamond Pattern in PHP

// It's the size of pattern
$x = 15;

// Size of the hollow diamond should be even number
if ($x % 2 == 1)
    $x++;

// This will print the hollow diamond pattern
hollowDiamond($x);

function hollowDiamond($size) {
    $diff = $size / 2;

    echo "-----The hollow diamond pattern is-----\n\n";

    // This will print the first half diamond
    for ($i = 1; $i <= $diff; $i++) {
        echo "\t";
        for ($j = 1; $j <= $diff - $i; $j++) {
            echo " ";
        }
        if ($i == 1) {
            echo "*";
        } else {
            echo "*";
            for ($j = 1; $j <= 2 * $i - 3; $j++) {
                echo " ";
            }
            echo "*";
        }
        echo "\n";
    }

    // This will print the last half diamond
    for ($i = $diff + 1; $i < $size; $i++) {
        echo "\t";
        for ($j = 1; $j <= $i - $diff; $j++) {
            echo " ";
        }
        if ($i == $size - 1) {
            echo "*";
        } else {
            echo "*";
            for ($j = 1; $j <= 2 * ($size - $i) - 3; $j++) {
                echo " ";
            }
            echo "*";
        }
        echo "\n";
    }
}
?>