Question

如何使用php cookie为访问者设置单击“提交”按钮限制。示例：如果用户从php邮件表单发送了3封邮件。发送3封邮件后，它将显示您的限制已结束。我怎么能这样做？

<form action="post.php" mathord="post"><input type="email" placeholder="Your Email" name"email"><input type="text" placeholder="Your Text"  name="text"><input type="submit" value="sent" name="sub"></form>

发送邮件后。如果用户尝试发送另一封电子邮件。它会说你已经发了邮件给我们

Answer 1

这是一个工作表单的完整示例，其中IP只能发布三次。它由JSON＆＃34;数据库＆＃34;管理。和一个数组。

我希望这会有所帮助。

<强>代码

<?php

if (isset($_POST['sub'])) { // Checking if there's a submit

    $dir = __DIR__ . "/submitted.json"; // File directory

    if (!file_exists($dir)) { // If the file doesn't exist
        file_put_contents($dir, "[]"); // Creates a file
        $jsonDatabase = array();
    } else
        $jsonDatabase = json_decode(file_get_contents($dir), true); // If it exists, it gets the content

    $userIP = $_SERVER['REMOTE_ADDR']; // Save the user IP in a variable

    if (array_key_exists($userIP, $jsonDatabase)) { // If the user IP exists in the array

        if ($jsonDatabase[$userIP] <= 3) { // If the IP has less than three submits
            $jsonDatabase[$userIP] += 1; // Adds a submit to the IP
            $canSubmit = true;
        }


    } else { // If the IP doesn't exist in the array
        $jsonDatabase[$userIP] = 1; // Save the IP in the array with the value one
        $canSubmit = true;
    }

    file_put_contents($dir, json_encode($jsonDatabase)); // Save the array back to the "database"

    if ($canSubmit) { // If the IP can submit
        // Do your stuff with the data you've got.
    } else { // If not
        echo "You've reached the limit.";
    }
}

?>

<html>
<head>
    <title>StackOverflow example</title>
</head>
<body>
<form action="index.php" method="post">
    <input type="email" placeholder="Your Email" name="email"/><br>
    <input type="text" placeholder="Your Text" name="text"/><br/>
    <input type="submit" value="Send" name="sub"/>
</form>
</body>
</html>

问候。

为用户提交按钮限制

1 个答案: