PHP programming tips: while loop draws beautiful solid diamonds

PHP programming tips: while loop draws beautiful solid diamonds

As a popular back-end programming language, PHP has powerful Functional and flexible syntax, how to use PHP to write beautiful graphics? In this article, I will demonstrate how to use a while loop to draw a solid diamond, allowing you to feel the charm of PHP.

First of all, we need to understand the characteristics of the diamond: each row of the diamond is composed of spaces and asterisks. As the number of rows increases, the spaces gradually decrease and the asterisks gradually increase. We can implement this logic through while loop.

The following is an example of the PHP code we need:

<?php
$rows = 7; // Define the number of rows in the diamond
$spaces = $rows - 1; //Initial number of spaces in the first row
$stars = 1; //Initial number of stars in the first line

// The upper part of the rhombus
$i = 0;
while ($i < $rows) {
    echo str_repeat(" ", $spaces); // Output spaces
    echo str_repeat("*", $stars); // Output stars
    echo "
";

    $spaces--; // Reduce the number of spaces per line
    $stars = 2; // The number of stars increases each time
    $i;
}

// Lower half of the rhombus
$spaces = 1; // Initialize the number of spaces in the lower half
$stars = $rows * 2 - 3; // Initialize the number of stars in the lower half
$i = 0;
while ($i < $rows - 1) {
    echo str_repeat(" ", $spaces); // Output spaces
    echo str_repeat("*", $stars); // Output stars
    echo "
";

    $spaces; // Increase the number of spaces per line
    $stars -= 2; // The number of stars decreases each time
    $i;
}
?>

In the above code, we first define the number of rows of the diamond as 7, and then use a while loop to output the upper and lower parts of the diamond in sequence. By constantly adjusting the number of spaces and asterisks, a beautiful solid diamond is finally drawn.

Through this example, we can see that it is possible to draw complex graphics by using PHP's while loop combined with simple logic. I hope this example can help you better understand the application of PHP and stimulate your interest in programming.

To summarize, it is very important to master basic programming skills. I hope that sharing this article can help everyone learn and understand PHP programming better. Let's use code to create more interesting and practical works together!

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