Use PHP to write a while loop to generate a solid diamond

Title: Write a while loop in PHP to generate a solid diamond

In PHP, we can use a while loop to generate a solid diamond. The following uses a specific code example to demonstrate how to use PHP to write a while loop to generate a solid diamond.

<?php
// Define the number of rows of the diamond
$rows = 7;

// the top half
for ($i = 1; $i <= $rows; $i ) {
    //Print spaces on each line
    for ($j = 1; $j <= $rows - $i; $j ) {
        echo " ";
    }
    //Print each line*
    $j = 1;
    while ($j <= 2 * $i - 1) {
        echo "*";
        $j;
    }
    echo "
";
}

// the second half
for ($i = $rows - 1; $i >= 1; $i--) {
    //Print spaces on each line
    for ($j = 1; $j <= $rows - $i; $j ) {
        echo " ";
    }
    //Print each line*
    $j = 1;
    while ($j <= 2 * $i - 1) {
        echo "*";
        $j;
    }
    echo "
";
}
?>

In the above code, we first defined the number of rows of the diamond as 7 rows. Then it is divided into the upper half and the lower half, and two for loops are used to control the number of rows. In each line, use a while loop to print spaces and *, thereby generating the effect of a solid diamond.

Through the above code example, we can see how to use PHP to write a while loop to generate a solid diamond. Hope this example helps you!

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