How to implement solid diamond in while loop in php

php The steps to use a while loop to implement a solid diamond are: 1. Create a PHP sample file; 2. Define the variable "$size" to control the size of the diamond; 3. In the upper part of the loop, use the inner while loop to print spaces, and another inner while loop to print asterisks; 4. In the second half of the loop, use similar logic in reverse order to print spaces and asterisks.

Operating system for this tutorial: Windows 10 system, php8.1.3 version, Dell G3 computer.

Using the while loop in PHP to print a solid diamond, you can follow the following steps:

<?php
$size = 5;  // 菱形的大小（行数）
// 上半部分
$row = 1;
while (row<=row <= row<=size) {
    // 打印空格
    spaces=spaces = spaces=size - $row;
    while ($spaces > 0) {
        echo " ";
        $spaces--;
    }
    // 打印星号
    stars=2∗stars = 2 * stars=2∗row - 1;
    while ($stars > 0) {
        echo "*";
        $stars--;
    }
    echo "
";
    $row++;
}
// 下半部分
row=row = row=size - 1;
while ($row >= 1) {
    // 打印空格
    spaces=spaces = spaces=size - $row;
    while ($spaces > 0) {
        echo " ";
        $spaces--;
    }
    // 打印星号
    stars=2∗stars = 2 * stars=2∗row - 1;
    while ($stars > 0) {
        echo "*";
        $stars--;
    }
    echo "
";
    $row--;
}
?>

In the above code, we use two while loops, one for drawing the upper part of the rhombus, and another to draw the lower half of the rhombus.

In the first half of the loop, we use the inner while loop to print spaces, and determine how many spaces need to be printed based on the difference between the current number of lines and the total number of lines. Then use another inner while loop to print the asterisks, and determine how many asterisks need to be printed based on the current number of lines.

In the second half of the loop, we use similar logic in reverse order to print spaces and asterisks.

Please note that after outputting each line, we use echo " " to print a newline character so that the diamond is displayed in the correct format in the terminal.

You can adjust the size value to control the size of the diamond as needed. The above code will print a solid diamond composed of * characters, The size of the diamond is specified by size.

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