Question

我对编程很新。我正在尝试编写一个相当基本的if，ifif是我的数据库代码片段，但是当它编译时，它只是从第一个if语句一直打印到最后的代码。我已经过了好几天，无法解决我出错的地方

<!DOCTYPE html>
<html>
<body>

<?php
$row = "A1 Header";
$compulsary = FALSE;
$mutable = TRUE;
$included = FALSE;

if ($compulsary == FALSE and $mutable == TRUE) {
        echo "<textarea style=background-color:yellow; name=\"message\">Please Enter</textarea><br>";
    }
elseif ($compulsary == FALSE and $mutable == FALSE){    
        echo "'"$row"'";
        }

elseif ($compulsary == True and $mutable == True) {
    echo "<textarea style=background-color:yellow; name=\"message\">Please Enter</textarea><br>";
    }
else {
    echo "'"$row"'";
    }
?>

</body>
</html>

Answer 1

试试这个

<!DOCTYPE html>
<html>
    <body>

        <?php
        $row = "A1 Header";
        $compulsary = FALSE;
        $mutable = TRUE;
        $included = FALSE;

        if ($compulsary == FALSE and $mutable == TRUE) {
            echo "<textarea style=background-color:yellow; name=\"message\">Please Enter</textarea><br>";
        } elseif ($compulsary == FALSE and $mutable == FALSE) {
            echo "'".$row."'";
        } elseif ($compulsary == True and $mutable == True) {
            echo "<textarea style=background-color:yellow; name=\"message\">Please Enter</textarea><br>";
        } else {
            echo "'".$row."'";
        }
        ?>

    </body>
</html>

Answer 2

You can do like this:  



<!DOCTYPE html>
    <html>
    <body>

    <?php
    $row = "A1 Header";
    $compulsary = FALSE;
    $mutable = TRUE;
    $included = FALSE;

    if ($compulsary == FALSE and $mutable == TRUE) {
            echo "<textarea style='background-color:yellow;' name='\"message\"'>Please Enter</textarea><br>";
        }
    elseif ($compulsary == FALSE and $mutable == FALSE){    
            echo $row;
            }

    elseif ($compulsary == TRUE and $mutable == TRUE) {
        echo "<textarea style='background-color:yellow;' name='\"message\"'>Please Enter</textarea><br>";
        }
    else {
        echo $row;
        }
    ?>

    </body>
    </html>

Answer 3

我认为你有语法错误。试试这个：

echo "'\"$row\"'";

PHP If语句响应所有代码而不是打印答案

3 个答案: