Question

我无法在代码中识别问题。我正在使用WordPress内容管理系统中的代码：

    <?php
include_once 'includes/register.inc.php';
include_once 'includes/functions.php';
?>
<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>Secure Login: Registration Form</title>
        <script type="text/JavaScript" src="js/sha512.js"></script> 
        <script type="text/JavaScript" src="js/forms.js"></script>
        <link rel="stylesheet" href="styles/main.css" />
    </head>
    <body>
        <!-- Registration form to be output if the POST variables are not
        set or if the registration script caused an error. -->
        <h1>Register with us</h1>
        <?php
        if (!empty($error_msg)) {
            echo $error_msg;
        }
        ?>
        <ul>
            <li>Usernames may contain only digits, upper and lower case letters and underscores</li>
            <li>Emails must have a valid email format</li>
            <li>Passwords must be at least 6 characters long</li>
            <li>Passwords must contain
                <ul>
                    <li>At least one upper case letter (A..Z)</li>
                    <li>At least one lower case letter (a..z)</li>
                    <li>At least one number (0..9)</li>
                </ul>
            </li>
            <li>Your password and confirmation must match exactly</li>
        </ul>
        <form action="<?php echo esc_url($_SERVER['PHP_SELF']); ?>" 
                method="post" 
                name="registration_form">
            Username: <input type='text' 
                name='username' 
                id='username' /><br>
            Email: <input type="text" name="email" id="email" /><br>
            Password: <input type="password"
                             name="password" 
                             id="password"/><br>
            Confirm password: <input type="password" 
                                     name="confirmpwd" 
                                     id="confirmpwd" /><br>
            <input type="button" 
                   value="Register" 
                   onclick="return regformhash(this.form,
                                   this.form.username,
                                   this.form.email,
                                   this.form.password,
                                   this.form.confirmpwd);" /> 
        </form>
        <p>Return to the <a href="index.html">login page</a>.</p>
    </body>
</html>

我收到一条错误：PHP致命错误：在/var/www/html/register.php中调用未定义的函数esc_url（）。此函数用于清理PHP_SELF服务器变量的输出：这是我的函数：

function esc_url($url) {

    if ('' == $url) {
        return $url;
    }

    $url = preg_replace('|[^a-z0-9-~+_.?#=!&;,/:%@$\|*\'()\\x80-\\xff]|i', '', $url);

    $strip = array('%0d', '%0a', '%0D', '%0A');
    $url = (string) $url;

    $count = 1;
    while ($count) {
        $url = str_replace($strip, '', $url, $count);
    }

    $url = str_replace(';//', '://', $url);

    $url = htmlentities($url);

    $url = str_replace('&amp;', '&#038;', $url);
    $url = str_replace("'", '&#039;', $url);

    if ($url[0] !== '/') {
        // We're only interested in relative links from $_SERVER['PHP_SELF']
        return '';
    } else {
        return $url;
    }
}

我无法找到这两个代码中会出现错误的位置。

Answer 1

你说该功能存在于文件

中

/var/www/html/register.php

但你要包括

include_once 'includes/register.inc.php';

哪个文件名不正确。如果您使用过require_once，那么您自己就会发现错误。将include更改为require并收到错误消息。

require_once 'includes/register.inc.php';
require_once 'includes/functions.php';

修改

好像我重读了错误信息而register.php不是应该包含的文件。但是这个答案仍然会站在这里而不会被删除，因为错误仍然是由于同样的问题。

如果遇到未定义函数的消息，则它是未定义的。并且这仅表示它在当前文件中的存在以及任何包含的文件中的存在。当然，这不是PHP核心功能。

PHP致命错误：调用未定义的函数esc_url（）

1 个答案: