为什么javascript验证结束而不是php验证

Question

帮助！我似乎无法通过javascript验证我的表单，如果成功，则通过php验证。我做错了什么？在检查完javascript函数后，它只会重新加载一个空白的checkout.php？我一辈子都搞不明白为什么会发生这种事。它需要检查javascript，然后如果成功则检查php，如果成功则提交并转到conformation.php页面。

Javascript验证代码：

function validateForm() {
    valid = true;
    var a=document.forms["checkout"]["fname"].value;
    if (a==null || a=="")
    {
    alert("First name must be filled out");
    valid = false;
    }
    var b=document.forms["checkout"]["lname"].value;
    if (b==null || b=="")
    {
    alert("Last name must be filled out");
    valid = false;
    }
    var c=document.forms["checkout"]["address"].value;
    if (c==null || c=="")
    {
    alert("Address must be filled out");
    valid = false;
    }   
    var d=document.forms["checkout"]["email"].value;
    if (d==null || d=="")
    {
    alert("Email address must be filled out");
    valid = false;
    }
    var e=document.forms["checkout"]["email"].value;
    if(!validateEmail(e)){
    alert("Must be a valid email address");
    valid = false;
    }   
    var f=document.forms["checkout"]["phone"].value;
    if (f==null || f=="")
    {
    alert("Phone number must be filled out");
    valid = false;
    }
    var g=document.forms["checkout"]["phone"].value;
    if(!validatePhone(g)){
    alert("Must be a valid phone number");
    valid = false;
    }   
    var h=document.forms["checkout"]["card"].value;
    if (h==null || h=="")
    {
    alert("Credit card info must be filled out");
    valid = false;
    }
    var i=document.forms["checkout"]["card"].value;
    if(!validateCard(i)){
    alert("Must be a valid credit card number");
    valid = false;
    }
    return valid;
}
 function validateEmail(email) {
    var pattern = new RegExp(/^[_a-z0-9-]+(.[_a-z0-9-]+)*@[a-z0-9-]+(.[a-z0-9-]+)*(.[a-z]{2,3})$/);
    return pattern.test(email);
}
function validatePhone(phone) {
    var ppattern = new RegExp(/^[(]?(d{0,3})[)]?[s]?[-]?(d{3})[s]?[-]?(d{4})[s]?[x]?(d*)$/);
    return ppattern.test(phone);
}
function validateCard(card) {
    var cpattern = new RegExp(/(?:d[ ]?){12,17}d/);
    return cpattern.test(card);
}

php验证代码：

if(isset($_POST['SubmitForm'])){
if(empty($_POST['fname'])){
    echo "First name cannot be empty!<br/><br/>";
    return false;
}
if(empty($_POST['lname'])){
    echo "Last name cannot be empty!<br/><br/>";
    return false;
}
if(empty($_POST['address'])){
    echo "Address field cannot be empty!<br/><br/>";
    return false;
}
if(empty($_POST['email'])){
    echo "Email field cannot be empty!<br/><br/>";
    return false;
}
if($_POST['email']){
    $email = $_POST['email'];
    $regex = '/^[_a-z0-9-]+(.[_a-z0-9-]+)*@[a-z0-9-]+(.[a-z0-9-]+)*(.[a-z]{2,3})$/'; 
    $match = preg_match($regex,$email);
    if(!$match)
    echo "Not a valid email address!<br/><br/>";
    return false;
}
if(empty($_POST['phone'])){
    echo "Phone number cannot be empty!<br/><br/>";
    return false;
}
if($_POST['phone']){
    $phone = $_POST['phone'];
    $reg = '/^[(]?(d{0,3})[)]?[s]?[-]?(d{3})[s]?[-]?(d{4})[s]?[x]?(d*)$/';
    $pmatch = preg_match($reg, $phone);
    if (!$pmatch)
    echo "Not a valid phone number!<br/><br/>";
    return false;
}
if(empty($_POST['card'])){
    echo "Card field cannot be empty!<br/><br/>";
    return false;
}
if($_POST['card']){
    $card = $_POST['card'];
    $match = preg_match("#[0-9]#",$card);
    if(strlen($card) < '13')
    echo "Card field must be at least 13 digits <br/><br/>";
    return false;
    if(!$match)
    echo "Card number must be numeric<br/><br/>";
    return false;
}
if($_POST['month']){
$month = $_POST['month'];
if($month < 05)
    echo "Expired credit card";
    return false;
}
return true;
$fname = $_SESSION['fname'];
    $lname = $_SESSION['lname'];
    $email = $_SESSION['email'];
    $phone = $_SESSION['phone'];
    $representation = json_encode($_SESSION['cart'],JSON_PRETTY_PRINT);
    $pfile = fopen("orders.txt","a+");
    rewind($pfile);
    fwrite($pfile, "rn$fname:$lname:$email:$phone:$representation");
    fclose($pfile);
}

最后是形式本身：

<form name = 'checkout' method='post' onsubmit="return validateForm()" action="<?php echo $_SERVER['PHP_SELF']; ?>" accept-charset='UTF-8'>
<table style="border:thin solid #ccc;" rules="rows" cellpadding="6px" width="50%">
<tr><td>
</td></tr> 
<tr><td>First Name:<input type="text" name="fname" class="required" value="<?php if (isset($fname)){echo $fname;}?>" /></td></tr> 
<tr><td>
</td></tr> 
<tr><td>Last Name:<input type="text" name="lname" value="<?php if (isset($lname)){echo $lname;}?>" /></td></tr> 
<tr><td>
</td></tr> 
<tr><td>Address:</br><textarea name="address" id="address" value="<?php if (isset($address)){echo $address;}?>"></textarea></td></tr>
<tr><td>
</td></tr>  
<tr><td>Email:<input type="text" name="email" value="<?php if (isset($email)){echo $email;}?>"/></td></tr> 
<tr><td>
</td></tr> 
<tr><td>Phone:<input type="text" name="phone" value="<?php if (isset($phone)){echo $phone;}?>"/></td></tr> 
<tr><td>
</td></tr> 
<tr><td>Delivery method:<input type="radio" name="delivery"
    <?php if (isset($delivery) && $delivery=="regular post") echo "checked";?>
    value="regular post" checked>Regular Post
    <input type="radio" name="delivery"
    <?php if (isset($delivery) && $delivery=="courier") echo "checked";?>
    value="courier">Courier
    <input type="radio" name="delivery"
    <?php if (isset($delivery) && $delivery=="express courier") echo "checked";?>
    value="express courier">Express Courier</td></tr> 
<tr><td>
</td></tr> 
<tr><td>Credit Card No:<input type='text' name='card' maxlength='18' size='19' value="<?php if (isset($card)){echo $card;}?>"/></td></tr>
<tr><td>
</td></tr> 
<tr><td>Expiration Month:<select name="month">
    <option value="01">01</option>
    <option value="02">02</option>
    <option value="03">03</option>
    <option value="04">04</option>
    <option value="05">05</option>      
    <option value="06">06</option>
    <option value="07">07</option>
    <option value="08">08</option>
    <option value="09">09</option>
    <option value="10">10</option>
    <option value="11">11</option>
    <option value="12">12</option></select></td></tr>
<tr><td>
</td></tr> 
<tr><td>Expiration Year:<select name="year">
    <option value="2014">2014</option>
    <option value="2015">2015</option>
    <option value="2016">2016</option>
    <option value="2017">2017</option>
    <option value="2018">2018</option></select></td></tr>
<tr><td>
</td></tr> 
<tr><td><input type="checkbox" value="newsletter" name="letter[]">Check here to sign up for the newsletter</td></tr>    
<tr><td>
</td></tr> 
<tr><td colspan="2" align="left"><input type="submit" name="SubmitForm" value="Send"/></td></tr> 
</table> 

Answer 1

验证的这一部分是错误的！

如果将$_POST['month']传递给验证，则会导致验证始终返回FALSE。

它也永远不会运行文件生成，因为在运行文件创建代码之前，您有一个return true。

if($_POST['month']){
    $month = $_POST['month'];
    if($month < 05)
        echo "Expired credit card";
    return false;
}
return true;
$fname = $_SESSION['fname'];
    $lname = $_SESSION['lname'];
    $email = $_SESSION['email'];
    $phone = $_SESSION['phone'];
    $representation = json_encode($_SESSION['cart'],JSON_PRETTY_PRINT);
    $pfile = fopen("orders.txt","a+");
    rewind($pfile);
    fwrite($pfile, "rn$fname:$lname:$email:$phone:$representation");
    fclose($pfile);

据猜测，它可能看起来像这样：

if($_POST['month']){
    $month = $_POST['month'];
    if($month < 05) {
        echo "Expired credit card";
        return false;
    }
}
$fname = $_SESSION['fname'];
$lname = $_SESSION['lname'];
$email = $_SESSION['email'];
$phone = $_SESSION['phone'];
$representation = json_encode($_SESSION['cart'],JSON_PRETTY_PRINT);
$pfile = fopen("orders.txt","a+");
rewind($pfile);
fwrite($pfile, "rn$fname:$lname:$email:$phone:$representation");
fclose($pfile);
return true;