Question

我又回来了。我已经为form-process.php;

制作了这个php代码

    <?php
//prevent access if they haven't submitted the form.
if (!isset($_POST['submit'])) {
die(header("Location: form.php"));
}

session_start();

$_SESSION['formAttempt'] = true;

if (isset($_SESSION['error'])){
    unset($_SESSION['error']);
}

$required = array ("name", "email", "password1", "password2");

$_SESSION['error'] = array();

//Check required fields
foreach ($required as $requiredField) {
    if(!isset($_POST[$requiredField])  || $_POST[$requiredField] == "") {
        $_SESSION['error'] [] = $requiredField . "is required." ;
    }
}

//Validating Text in name
if (!preg_match('/^[/w.]+$/',$_POST['name'])) {
    $_SESSION['error'] [] = "Name must be letters and numbers only.";
}

//Validating Drop Down Selection
$validStates = array("Alabama","California", "Colorado", "Florida", "Illinois", "New York");
if (isset($_POST['state']) && $_POST['state'] != "") {
    if(!in_array($_POST['state'], $validStates)) {
        $_SESSION['error'] []="Please choose a valid state.";
    }
}

//Validating an Email
if(!filter_var($_POST['email'], FILTER_VALIDATE_EMAIL)) {
    $_SESSION['error'] = "Invalid email address";
}

//Ensure that the Passwords Match
if ($_POST['password1'] != $_POST['password2']) {
    $_SESSION['error'] [] = "Passwords do not match.";
}

//Final Disposition
if (isset($_SESSION['error']) && count ($_SESSION['error']) > 0) {
    die(header("Location: form.php")); 
} else {
    unset($_SESSION['formAttempt']);
    die(header("Location:success.php"));
}
?>

登录表单Div错误php代码;

<?php 
       if (isset($_SESSION['error']) && isset($_SESSION['formAttempt'])) {
           unset ($_SESSION['formAttempt']);
           print "Errors encountered <br />\n";
           foreach ($_SESSION['error'] as $error) {
           print $error . "<br />\n"; } 
   } 
 ?>

但是，在实际登录表单上测试时，我收到此错误：

警告：在第20行的E：\ XAMPP \ htdocs \ form.php中为foreach（）提供的参数无效

我对PhP很陌生，所以我可能会错过一些东西，但我无法完全理解它...抱歉

Answer 1

$_SESSION['error'] = "Invalid email address";

这会使它成为一个字符串而不是先前初始化的数组，从而导致foreach出错。尝试：

$_SESSION['error'][] = "Invalid email address";

也

$_SESSION['error'] [] = "Passwords do not match.";

$ _SESSION [＆＃39;错误＆＃39;]和[]之间不应该有空格，不确定这是否会导致问题，验证中有多个地方有额外的空间。< / p>

在登录表单上测试错误消息时，Foreach无效

1 个答案: