时间戳

首页 > 解决方案 > 如何让 php 验证适用于表单？

php - 如何让 php 验证适用于表单？

问题描述

我需要在表单发送到会话数组之前对其进行验证，这就是我目前所拥有的。

使用PHP_SELF表单被发送到需要验证输入的输入是否正确和有效的索引。

在提交表单之前会回显错误，并且每次提交错误输入时，其他消息都不会回显。页面刷新

任何帮助都会很棒，我已经禁用了我的 javascript 验证来测试它，并且功能只有一半

PHP代码：

<?php
    // define variables and set to empty values
    $nameErr = $emailErr = $mobileErr = $creditCardErr = $expiryErr = "";
    $name = $email = $mobile = $creditCard = $expiry = "";

    if ($_SERVER["REQUEST_METHOD"] == "POST") {
        function validate($str) {
            return trim(htmlspecialchars($str));
        }

        //Valikdating User name
        if (empty($_POST["cust[name]"])) {
            $nameErr = "Name is required";
        } else {
            $name = validate($_POST["cust[name]"]);

            if (!preg_match("/\b([A-Z]{1}[a-z]{1,30}[- ]{0,1}|[A-Z]{1}[- \']{1}[A-Z]{0,1}  
    [a-z]{1,30}[- ]{0,1}|[a-z]{1,2}[ -\']{1}[A-Z]{1}[a-z]{1,30}){2,5}/",$name)) {
                $nameErr = "Only Western names, letters and white spaces allowed";
            }
        }

        if (empty($_POST["cust[email]"])) {
            $emailErr = "Email is required";
        } else {
            $email = validate($_POST["cust[email]"]);
            // check if e-mail address is well-formed
            if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
                $emailErr = "Invalid email format";
            }
        }

        if (empty($_POST["cust[mobile]"])) {
            $mobileErr = "Mobile Number is required";
        } else {
            $mobile = validate($_POST["cust[mobile]"]);
            //check if mobile phone is inputted correctly
            if (!preg_match("/^(\(04\)|04|\+614)( ?\d){8}$/",$mobile)) {
                $mobilelErr = "Invalid Mobile Number";
            }
        }

        if (empty($_POST["cust[card]"])) {
            $creditCardErr = "Credit Card is required";
        } else {
            $creditCard = validate($_POST["cust[card]"]);
            //check if all credit card types are valid

            if (!preg_match("/^(\d){16}$/",$creditCard)) {

            }else if(!preg_match("/^(\d){4}\s{1}(\d){4}\s{1}(\d){4}\s{1}(\d){4}$/",$creditCard)) {

            }else if(!preg_match("/^(\d){4}\-{1}(\d){4}\-{1}(\d){4}\-{1}(\d){4}$/",$creditCard)) {
                $creditCardErr = "Invalid Credit Card";
            }
        }




        //This needs to be fixed
       if (empty($_POST["cust[expiry]"])) {
           $expiryErr = "Expiry is required";
       } else {
           $expiry = validate($_POST["cust[expiry]"]);
           //check if expiry is valid and a month ahead
           if (!preg_match("",$expiry)) {
               $expiryErr = "Invalid date, select month onwards";
           }
       }
   }

?>

HTML 表单代码：

<div id="bookingsCard">
    <form  id="seatform" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>" method="post">

        <!-- Customer Details -->
        <div class="CustomerDetails">

            <label for="CustomerDetails"><b>CUSTOMER DETAILS</b></label>
            <br><br>

            <label for="Name"><b>Name</b></label>
            <input type="text" name="cust[name]"  id="cust-name" value="<?php echo $name; ?>">
            <span class="error">* <?php echo $nameErr;?></span>
            <br><br>

            <label for="Email"><b>Email</b></label>
            <input type="email" name="cust[email]" id='cust-email' value="<?php echo $email; ?>">
            <span class="error">* <?php echo $emailErr;?></span>
            <br><br>

            <label for="Mobile"><b>Mobile</b></label>
            <input type="tel" name="cust[mobile]" id='cust-mobile' value="<?php echo $mobile; ?>">
            <span class="error">* <?php echo $mobileErr;?></span>
            <br><br>

            <label for="Credit Card"><b>Credit Card</b></label>
            <input type="text" name="cust[card]" id='cust-card' value="<?php echo $creditCard; ?>">
            <span class="error">* <?php echo $creditCardErr;?></span>
            <br><br>

            <label for="Expiry"><b>Expiry</b></label>
            <input type="month" name="cust[expiry]" id='cust-expiry' 
                                            pattern="[0-9]{4}-[0-9]{2}" value="<?php echo $expiry; ?>">
            <span class="error">* <?php echo $expiryErr;?></span>
            <br><br>
        </div>
        <hr>
        <label><b>Total Amount</b></label>
        <input  name="total" id="total" type="text" readonly>
        <br><br>
        <button type="submit" class="bookbtn" name="order" value='order' id='bookbtn' >Book Now!</button>
    </form>
</div>

标签： phphtmlformsvalidationsession

解决方案

你可以做这样的事情：对于 html： <input type="text" required name="custname" id="cust-name" value="<?php echo $name; ?>"><span class="error">* <?php echo $nameErr;?></span>不知道你为什么使用 cust[name] 但我使用了简化的名称，并添加了 html 5 验证required，这让生活更轻松。现在提交表单 php 后：

 if ( isset($_POST["name"]) && !empty($_POST["name"])) {

 $name = $_POST["name"];
//your other validation

  } else {
      $nameErr = "Name is required/ not set";
  }

//希望它可以帮助您快乐编码

推荐阅读