如何在桌子内制作菱形图案/形状（星号）？ (html + php)

Question

我必须在表格内使用 for 循环制作一个菱形星号。 星号前后必须有“空白”<td> 空格才能移动并使其看起来居中，因此它看起来像钻石。我怎么做？ （我在 HTML 代码中使用了 PHP。）

没有<tr> 和<td> 标签的代码，看起来像菱形，因为它居中对齐：

<center>
<?php
echo "<table border = 1>";

    // loop for the pyramid

        for($i = 1; $i <= 10; $i += 2) {
            for($j = 1; $j <= $i; $j++) {
                echo "* ";
            }
        echo "<br />";
        }

    // loop for the inverted pyramid, so it looks like a diamond

    for($i = 7; $i >= 1; $i -= 2) {
        for($j = 1; $j <= $i; $j++) {
            echo "* ";
        }   
    echo "<br />";
    }

echo "</table>";
?>
</center>

带有<tr> 和<td> 标签的代码需要“空格”以使其看起来像居中对齐：

<?php
echo "<table border = 1>";

    // loop for the pyramid

    echo "<tr>";
            for($i = 1; $i <= 10; $i += 2) {
            echo "<tr>";
                for($j = 1; $j <= $i; $j++) {
                    echo "<td>* </td>";
                }
            echo "</tr>";
        }
    echo "</tr>";

    // loop for the inverted pyramid, so it looks like a diamond

    for($i = 7; $i >= 1; $i -= 2) {
    echo "<tr>";
        for($j = 1; $j <= $i; $j++) {
            echo "<td>* </td>";
        }   
    echo "<br />";
    echo "</tr>";
    }

echo "</table>";
?>

请帮忙！

Answer 1

这是您的解决方案的新代码。我添加了逻辑来将空白 td 向前和向后放置到 *

<?php
echo "<table border = 1>";

    // loop for the pyramid

    echo "<tr>";
    $max = $initAmount = 10;
            for($i = 1; $i <= $initAmount; $i += 2) {
                $max = $max -2;

                    $halfTD = (int)$max/2;
            echo "<tr>";
            for($b = 1; $b <= $halfTD; $b++){
                        echo "<td></td>";
                    }
                for($j = 1; $j <= $i; $j++) {


                    echo "<td>* </td>";
                }
                for($b = 1; $b <= $halfTD; $b++){
                        echo "<td></td>";
                    }
            echo "</tr>";
        }
    echo "</tr>";

    // loop for the inverted pyramid, so it looks like a diamond
$max = $initAmount = 10;
    for($i = 7; $i >= 1; $i -= 2) {
        $max = $max -2;
        $diff = $initAmount - $max;
        $blankTd = $diff/2;

    echo "<tr>";
        for($b = 1 ; $b <= $blankTd; $b++){
            echo "<td></td>";
        }
        for($j = 1; $j <= $i; $j++) {
            echo "<td>* </td>";
        }   
        for($b = 1 ; $b <= $blankTd; $b++){
            echo "<td></td>";
        }
    echo "</tr>";
    }

echo "</table>";
?>

Answer 2

我使用下面的代码而不使用表格来制作菱形。

<div style="text-align: center">
<?php
$n = 8;

if($n === 1){ die("input must be greater than 1"); }

$nn = ($n * 2);
$m = (ceil($nn / 2) + 1);
$temp = 0;

for($x = 1; $x <= $nn; $x++){
    $temp = (($x < $m) ? ($temp + 1) : ($temp - 1));
    $total = ($temp > 1 ? ((2 * $temp) - 1) : $temp);

    echo nl2br(str_repeat('* &nbsp;', $total) . "\r\n");
}
?>

Answer 3

我使用了下面的代码。

<div style="text-align: center">
<?php
$n = 8;

if($n === 1){ die("input must be greater than 1"); }

$nn = ($n * 2);
$m = (ceil($nn / 2) + 1);
$temp = 0;

for($x = 1; $x <= $nn; $x++){
    $temp = (($x < $m) ? ($temp + 1) : ($temp - 1));
    $total = ($temp > 1 ? ((2 * $temp) - 1) : $temp);

    echo nl2br(str_repeat('* &nbsp;', $total) . "\r\n");
}
?>

Answer 4

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