How to use ID verification in PHP forms to enhance security-PHP Tutorial-php.cn

How to use ID verification in PHP forms to enhance security

PHPz

Release： 2023-06-25 11:32:02

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With the development of Internet technology, more and more businesses have moved online. At the same time, in order to ensure the security of user information, major websites pay more attention to user identity verification. As a reliable verification method, ID card verification is increasingly favored by major websites. In this article, we will detail how to use ID verification in PHP forms to enhance security for your website.

1. Basic format of ID card

ID card is a unique identity identifier, consisting of 18 digits and 1 digit check code. Among them, the first 17 digits are the identity code of the ID card number, and the last digit is the check code. In the PHP form, we need to authenticate based on the format of the ID card.

2. PHP verification of ID card

In PHP, we can use regular expressions to verify ID cards. The following is a simple PHP function used to determine whether the input ID card meets the specifications:

function is_IDCard($idcard){ 
    if(!preg_match('/^d{17}[0-9xX]$/', $idcard)) {
        return false;
    }
    $parsed = date_parse(substr($idcard, 6, 8));
    if (!($parsed['error_count'] == 0 && $parsed['warning_count'] == 0)) {
        return false;
    }
    $sigma = 0;
    $coef = array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);
    for ($i = 0; $i < 17; ++$i) {
        $sigma += $coef[$i] * $idcard[$i];
    }
    $mod = $sigma % 11;
    $check = '10x98765432';
    return strtoupper($idcard[17]) === $check[$mod];
}

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By calling the above function, we can easily verify whether the input ID card meets the specifications. If the return value is true, it proves that the format of the input ID card is correct, otherwise it is incorrect.

3. ID card verification for PHP forms

In PHP forms, we often need to verify the ID card entered by the user. The following is a simple verification process:

The user enters the ID number in the form;
PHP obtains the ID number entered by the user;
Calls the is_IDCard function Perform ID verification;
Based on the returned results, determine whether the ID number entered by the user is correct.

The following is an example of a PHP form to demonstrate how to perform ID card verification:

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>PHP身份证验证表单</title>
</head>
<body>
    <form action="test.php" method="post">
        <label for="idcard">请输入您的身份证号码：</label>
        <input type="text" name="idcard" id="idcard">
        <input type="submit" value="提交">
    </form>
    <?php
        if(isset($_POST['idcard'])){
            $idcard = $_POST['idcard'];
            if(is_IDCard($idcard)){
                echo "<script>alert('身份证验证通过');</script>";
            }else{
                echo "<script>alert('身份证验证不通过');</script>";
            }
        }
    ?>
</body>
</html>

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With the above code, we can implement ID card verification in the PHP form. If the ID number entered by the user meets the specifications, it will prompt "ID card verification passed", otherwise it will prompt "ID card verification failed".

Summary: ID card verification is an important security method and is widely used in Internet applications. In PHP forms, we can use regular expressions and PHP functions to implement ID verification, thereby improving the security of the website.

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