filter_var()在php电子邮件表单中抛出错误异常

Question

我正在尝试使用PHP的表单发送电子邮件.

我的PHP代码:

<?php

$name = trim(strip_tags(stripslashes($_POST['name'])));
$email = trim(strip_tags(stripslashes($_POST['email'])));
$subject = trim(strip_tags(stripslashes($_POST['subject'])));
$message = trim(strip_tags(stripslashes($_POST['message'])));

$successful = "Message was sent";
$failure = "Message was not sent";

$header = "From: $email\r\n";

$validEmail = filter_var($email, FILTER_VALIDATE_EMAIL);

if ($name <> "" && $email <> "" && $subject <> "" && $message <> "") {
    if ($validEmail) {
        mail ("myemail@em.com", $subject, $message, $header);
        header("Location: emailsent.php?message=$successful");
    }
    else {
        header("Location: emailnotsent.php?message=$failure");
    }
}

?>

我的HTML:

        <form method="post" name="contact" action="sendMail.php">

            <label for="author">Name:</label> <input type="text" id="author" name="name" class="required input_field" />
            <div class="cleaner h10"></div>

            <label for="email">Email:</label> <input type="text" class="validate-email required input_field" name="email" id="email" />
            <div class="cleaner h10"></div>

            <label for="subject">Subject:</label> <input type="text" class="validate-subject required input_field" name="subject" id="subject"/>                               
            <div class="cleaner h10"></div>

            <label for="text">Message:</label> <textarea id="text" name="text" rows="0" cols="0" name="message" class="required"></textarea>
            <div class="cleaner h10"></div>             

            <input type="submit" value="Send" id="submit" name="submit" class="submit_btn float_r" />
            <input type="reset" value="Reset" id="reset" name="reset" class="submit_btn float_l" />

        </form>

当我提交表单时,我收到以下错误:

致命错误:调用未定义的函数:第13行的/home/web/i/interfaithmedical.com/htdocs/PagesByZ/sendMail.php中的filter_var()

Answer 1

filter_var()适用于PHP> = 5.2.0.如果该函数不存在,那么您必须运行较旧的PHP版本(或者您正在运行的PHP版本已明确禁用此特定功能,这是非常不可能的).

您可以升级到更新的PHP,也可以自己实现功能以在PHP版本上运行.