代码未报错 但是未显示其功能

Question

我想在5行5列表格中输入 1~21数字 代码如下

<?php 
    echo "table border=1";
    for ($i = 0;$i < 5;$i++){
        echo "<tr>";
        for($j = 0;$j < 5;$j++){
            echo "<td>";
            $val = $j*5+$i+1;
            if($val<22) echo $val;
            else echo "&nbsp;";
            echo "</td>";
        }
        echo "</tr>";
    }
    echo "</table>";
?>

但是 其效果

请问是代码出现错误才导致没出现表格吗？ 还是哪里有问题 帮指出下 请大家帮帮忙~

Answer 1

第二行代码table标签没有<>;这种低级错误自己要控制。

Answer 2

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Answer 3

echo "table border=1";改为echo "<table border=1>";