Question

我已經準備好驗證號碼，電子郵件和消息等。

我現在的問題是如何驗證無線電/檢查btn。

這是我如何驗證等消息：

// Validates msg 

if (!isset($_POST[$field]) || empty($_POST['message'])) { 
    $error_msg .= " "; 
    $fieldStatusMessage = 'style="border:1px solid #F00"'; 
} 
else { 
    $fieldStatusEmail = ''; 
} 

將是有益的，如果有人可以解釋或告訴我。我認爲它與我現在正在做的事情非常接近？

Answer 1

你可以做類似下面

例1

PHP

<?php 
    if($_Post[]) { 
     if($_POST['list'] == -1) 
       echo 'Please select one on the List'; 
     else { 
       ............ 
     } 
} 
?> 

HTML

<form method="post"> 
<select name="list"> 
     <option value="-1">Select One</option> 
     <option value="1">One</option> 
     <option value="2">Two</option> 
</select> 
<input type="submit" name="submit"> 
</form> 

例2

HTML

<form name="frm1" action="action.php" method="post"> 
    Active ? 
    <input type="radio" name="myrdo" value="Y" /> Yes 
    <input type="radio" name="myrdo" value="N" /> No 
    <br /> 
    Education: 
    <input type="checkbox" name="mychk" value="G" /> Graduate 
    <br /> 
    Country: 
    <select name="country"> 
     <option value="" selected="selected">Select</option> 
     <option value="1">USA</option> 
     <option value="2">UK</option> 
     <option value="3">Canada</option> 
    </select> 
    <br /> 
    <input type="submit" name="btnSubmit" value="Submit Form" /> 
</form> 

PHP

if($_SERVER['REQUEST_METHOD'] == 'POST'){ 
    $error_msg = array(); 
    if(!isset($_POST['myrdo'])){ 
     $error_msg[] = "No radio buttons were checked."; 
    } 
    if(!isset($_POST['mychk'])){ 
     $error_msg[] = "Graguate was checked"; 
    } 
    if(!isset($_POST['country'])){ 
     $error_msg[] = "No country as selected."; 
    } 

    if(isset($error_msg) && count($error_msg) == 0){ 
     // do some form processing 
    } 
    else{ 
     // redirect to the form again. 
    } 
} 

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Answer 2

對於一個複選框，如果用戶選中它，你將有一個$ _ POST [ 'checkboxName']等於 「上」。如果用戶取消選中它，$ _POST ['checkboxName']將不存在。

對於一個單選按鈕，你將有一個$ _ POST [「radioName」]等於值選擇（HTML attribut值）

Answer 3

// if not checked consider FALSE 
$checkbox = (empty($_POST['checkbox_name'])) ? FALSE : TRUE; 

// if not selected consider FALSE otherwise use value from HTML. 
$radio = (empty($_POST['radio_name'])) ? FALSE : $_POST['radio_name'];