如何動態使用if語句php

Question

我有多個查詢表單並且有不同的字段。我要檢查驗證每個字段我有不同的形式與阿賈克斯

下面是我的示例代碼：

if($name && $email && $mobile && $departuredate && $vehicle && $query){  
    ?> 

    <form action="<?php echo DOMAIN; ?>contact/booking-form.php" method="post"> 
    <input type="hidden" name="name" value="<?php echo $name; ?>" /> 
    <input type="hidden" name="email" value="<?php echo $email; ?>" /> 

    <input type="hidden" name="mobile" value="<?php echo $mobile; ?>" /> 

    <?php if(isset($_POST['vehicle'])) {?> 
    <input type="hidden" name="vehicle" value="<?php echo $vehicle; ?>" /> 
    <?php } ?> 

    <input type="hidden" name="departuredate" value="<?php echo $departuredate; ?>" /> 
    <input type="hidden" name="query" value="<?php echo $query; ?>" /> 

    <input type="hidden" name="enquiry" value="<?php echo $enquiry; ?>" /> 
    <input type="hidden" name="page" value="<?php echo $page; ?>" /> 
    <input type="hidden" name="agree" value="<?php echo $agree; ?>" /> 

    <input type="hidden" name="submit" id="submit"> 

    </form> 

<script> 
var form = document.getElementById('submit').form; 
var submit_method = document.createElement("form").submit; 
submit_method.call(form); 
</script> 
<?php } ?> 

在給定的代碼$車輛沒有修復（有時此值爲空）。我如何檢查表格是否有車輛領域，然後檢查空車並繼續

Answer 1

嗨，你可以這樣使用。

<?php 

function function1() { 
echo "this is function 1"; 
} 

function function2() { 
echo "this is function 2"; 
} 

if ($page) 
eval("{$page}();"); 

echo "<a href='$PHP_SELF?page=function1'>Function 1</a>"; 
echo "<a href='$PHP_SELF?page=function2'>Function 2</a>"; 

?> 

Answer 2

您可以在JavaScript中使用此相同if聲明

<?php if(isset($_POST['vehicle'])) {?> 
    //if the field exists write your js validation otherwise . . . 
    <?php } ?> 

Answer 3

• 列表中的所有字段
• 收集所有必填字段
• 驗證
• 如果所有的驗證，過程數據

預訂-form.php的

<?php 
    // Fields 
    $name = $_POST['name']; 
    $email = $_POST['email']; 
    $mobile = $_POST['mobile']; 
    $departuredate = $_POST['departuredate']; 
    $vehicle = $_POST['vehicle']; 
    $query = $_POST['query']; 

    // other fields 

    // A set of required fields 
    $required_fields = array(
     $name, $email, $mobile, $departuredate, $vehicle, $query 
    ); 

    $message = []; 
    $is_ok = 1; 

    // Validate 
    foreach ($required_fields as $each) { 
     if (empty($each)) { 
      $message[] = 'Fields with (*) are required'; 
      $is_ok = 0; 
     } 
    } 

    // If all validated 
    if ($is_ok) { 
     // process the data 
    } 
?> 
<ul class="errors"> 
    <?php 
     // Display errors in list 
     foreach ($message as $each_msg) { 
      echo "<li>$each_msg</li>"; 
     } 
    ?> 
</ul> 
<form action="<?php echo $_SERVER['PHP_SELF'] ?>" method="post"> 
    <input type="hidden" name="name" value="<?php echo $name; ?>" /> 
    <input type="hidden" name="email" value="<?php echo $email; ?>" /> 
    <input type="hidden" name="mobile" value="<?php echo $mobile; ?>" /> 
    <?php if (isset($_POST['vehicle'])) { ?> 
     <input type="hidden" name="vehicle" value="<?php echo $vehicle; ?>" /> 
    <?php } ?> 
    <input type="hidden" name="departuredate" value="<?php echo $departuredate; ?>" /> 
    <input type="hidden" name="query" value="<?php echo $query; ?>" /> 
    <input type="hidden" name="enquiry" value="<?php echo $enquiry; ?>" /> 
    <input type="hidden" name="page" value="<?php echo $page; ?>" /> 
    <input type="hidden" name="agree" value="<?php echo $agree; ?>" /> 
    <input type="hidden" name="submit" id="submit"> 
</form> 

<script> 
    var form = document.getElementById('submit').form; 
    var submit_method = document.createElement("form").submit; 
    submit_method.call(form); 
</script>