Question

我试图通过＆＃34;早期退出＆＃34;来清理我的代码。每次我使用return语句时都会得到一个空白页面我应该将PHP代码移动到单独的文件吗？此外，我很乐意获得一些清理代码的提示。
谢谢!!

<?php
$capt_error = "";
$mismatch = "";
$name = $message = "";
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    session_start();
    // validate captcha
    if (empty($_POST["capt"])) {
        $capt_error = "Fältet är obligatoriskt.";
        return null; // HERE, I GET A BLANK PAGE
    } else {
        if($_POST['capt'] != $_SESSION['rand']) {
            $name = $_POST["name"];
            $message = $_POST['message'];
            $mismatch = "Inmatningen av CAPTHA är fel. Vänligen prova igen.";
        }
        else {
            // write to file but only if cookie is not set
            $ip_address = $_SERVER['REMOTE_ADDR'];
            $time_stamp = date('Y-m-d H:i');
            $data = "\n" . $_POST['name'] . ',' . $_POST['message'] . ',' . $ip_address . ',' . $time_stamp;
            $ret = file_put_contents('data.txt', $data, FILE_APPEND | LOCK_EX);
            if ($ret == false) {
                die('Fel vid skrivning till fil. Skrivrättigheter saknas');
            }

            // set cookie
            $cookie_name = $_POST['name'];
            $cookie_value = $ip_address;
            setcookie($cookie_name, $cookie_value, null, "/");
        }
    }
}
?>

<link rel="stylesheet" href="labb1.css" type="text/css">

<html>
    <head>
        <title>Labb 1</title>
    </head>
    <body>
        <h1 class="title">Laboration 1 - Gästboken</h1>
        <table border="1">
            <thead>
            <tr>
                <th colspan="3" class="table-title">Min Gästbok</th>
            </tr>
            </thead>
            <tbody>
                <tr>
                    <td class="bold">FRÅN</td>
                    <td class="bold">INLÄGG</td>
                    <td class="bold">LOGGNING</td>
                </tr>
                <?php
                    // open file
                    $f = fopen("data.txt", "r");
                    // while not end of file
                    while (!feof($f)) {
                        // split values with -
                        $arr = explode(",", trim(fgets($f), "\r\n"));
                        print "<tr>";
                            print "<td>$arr[0]</td>";
                            print "<td>$arr[1]</td>";
                            print "<td>IP: $arr[2]<br>TID: $arr[3]</td>";
                        print "</tr>";
                    }
                ?>
            </tbody>
        </table>

        <form action="" method="post">
            <div class="border">
                <div>
                    <span>Namn:</span>
                    <input type="text" name="name" value="<?php echo $name;?>">
                </div>
                <div>
                    <span>Meddelande:</span>
                    <textarea name="message" rows="5"><?php echo $message;?></textarea>
                </div>
                <div>
                    <?php
                        $rand = substr(str_shuffle(str_repeat("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz", 5)), 0, 5);
                        session_start();
                        $_SESSION["rand"] = $rand;
                        print "<span>CAPTCHA skriv detta i rutan nedan: </span> <span class='red bold'>$rand</span>"
                    ?>
                    <span class="error">* <?php echo $capt_error; ?></span>
                    <input type="text" name="capt">
                    <span class="error"><?php echo $mismatch?></span>
                </div>
                <div>
                    <input type="submit" value="Skicka">
                </div>
                <div>
                    <span class="red">*</span> är ett obligatoriskt fält
                </div>
            </div>
        </form>
    </body>
</html>

Answer 1

您似乎在代码中错误地使用了return语句。以下内容来自文档：

http://php.net/manual/en/function.return.php

如果从全局范围调用，则结束当前脚本文件的执行。如果包含或需要当前脚本文件，则将控制权传递回调用文件。

你似乎想要做的是捕获错误信息，然后在你的代码中使用它 - 这是完全可以的。只需设置一个带有错误的变量，继续执行代码并稍后检查变量。

提前退出给出空白页PHP？

1 个答案: