Notice：チェックボックスの検証で未定義のインデックス

Question

チェックボックスの検証に関して助けてください...毎回私が提出したときにヒントが表示されます： //フィールドに情報があることを確認しますか？ if（$ _ POST [$ field] == ''）array_push（$ validation、$ field）;

私は**注意が必要なコードを配置しました。私はチェックボックスの部分で何かを見逃していたかもしれません。コードを見てみてください。前もって感謝します。

if(isset($_POST['submit']) && $_POST['submit'] == 'SIGN-UP') 
{ 
//recieve and clean up the variables 
//prevent mysql injection 
$name = mysql_real_escape_string($_POST['name']); 
$surname = mysql_real_escape_string($_POST['surname']); 
$position = mysql_real_escape_string($_POST['position']); 
$organization = mysql_real_escape_string($_POST['organization']); 
$email = mysql_real_escape_string($_POST['email']); 
$ip = gethostbyname($_SERVER['REMOTE_ADDR']); 

//save the data on the DB 

//close connection 

} 

// Set email variables 
$email_to = ''; 
$email_subject = ''; 

**// Set required fields 
$required_fields = array('webinars', 'name', 'surname', 'position', 'organization', 'email');** 

**// set error messages 
$error_messages = array(
    'webinars' => 'Please enter your Webinar to proceed.',** 
    'name' => 'Please enter your Name to proceed.', 
    'surname' => 'Please enter your Surname to proceed.', 
    'position' => 'Please enter a Position to proceed.', 
    'organization' => 'Please enter your Organization to proceed.', 
    'email' => 'Please enter a valid Email Address to continue.' 
); 

// Set form status 
$form_complete = FALSE; 

// configure validation array 
$validation = array(); 

// check form submittal 
if(!empty($_POST)) { 
// Sanitise POST array 
foreach($_POST as $key => $value) $_POST[$key] = remove_email_injection(trim($value)); 

// Loop into required fields and make sure they match our needs 
foreach($required_fields as $field) {  
// the field has been submitted? 
if(!array_key_exists($field, $_POST)) array_push($validation, $field); 

// check there is information in the field? 
if($_POST[$field] == '') array_push($validation, $field); 

// validate the email address supplied 
if($field == 'email') if(!validate_email_address($_POST[$field])) array_push($validation, $field); 
    } 

// basic validation result 
if(count($validation) == 0) { 
// Prepare our content string 
$email_content = 'New webinar attendee for Cancer Surveillance: ' . "\n\n"; 

// simple email content 
foreach($_POST as $key => $value) { 
if($key != 'submit') $email_content .= $key . ': ' . $value . "\n"; 
     } 

// if validation passed ok then send the email 
mail($email_to, $email_subject, $email_content); 

// Update form switch 
     $form_complete = TRUE; 
    } 
} 

function validate_email_address($email = FALSE) { 
return (preg_match('/^[^@\s]+@([-a-z0-9]+\.)+[a-z]{2,}$/i', $email))? TRUE : FALSE; 
} 

function remove_email_injection($field = FALSE) { 
    return (str_ireplace(array("\r", "\n", "%0a", "%0d", "Content-Type:", "bcc:","to:","cc:"), '', $field)); 
} 
?> 



<?php if($form_complete === FALSE): ?> 

<div id="newsletter"> 

<form id="form" class="" name="form" method="post" action="cancer-surveillance-signup.php"> 
<label></label> 

<fieldset> 
**<label>Please select webinar dates:<?php if(in_array('webinars', $validation)): ?><span class="error"><?php echo $error_messages['webinars']; ?></span><?php endif; ?></label> 
<div class="webinarId"> 
<input type="checkbox" name="webinar" value="<?php echo isset($_POST['webinars'])? $_POST['webinars'] : ''; ?>March 9, 2012" />Friday, March 9, 2012, 11:00 AM<br> 
<input type="checkbox" name="webinar" value="March 11, 2012" />Monday, March 11, 2012, 11:00 AM<br> 
</div>** 


<label>Name: <?php if(in_array('name', $validation)): ?><span class="error"><?php echo $error_messages['name']; ?></span><?php endif; ?><input type="text" id="name" name="name" value="<?php echo isset($_POST['name'])? $_POST['name'] : ''; ?>" onFocus="this.value=''" maxlength="255"></label> 

<label>Surname: <?php if(in_array('name', $validation)): ?><span class="error"><?php echo $error_messages['surname']; ?></span><?php endif; ?><input type="text" id="surname" name="surname" value="<?php echo isset($_POST['surname'])? $_POST['surname'] : ''; ?>" onFocus="this.value=''" maxlength="255"></label> 

<label>Position: <?php if(in_array('name', $validation)): ?><span class="error"><?php echo $error_messages['position']; ?></span><?php endif; ?><input type="text" id="position" name="position" value="<?php echo isset($_POST['position'])? $_POST['position'] : ''; ?>" onFocus="this.value=''" maxlength="255"></label> 

<label>Organization: <?php if(in_array('name', $validation)): ?><span class="error"><?php echo $error_messages['organization']; ?></span><?php endif; ?><input type="text" id="organization" name="organization" value="<?php echo isset($_POST['organization'])? $_POST['organization'] : ''; ?>" onFocus="this.value=''" maxlength="255"></label> 

<label>Email: <?php if(in_array('email', $validation)): ?><span class="error"><?php echo $error_messages['email']; ?></span><?php endif; ?><input type="text" id="email" name="email" value="<?php echo isset($_POST['email'])? $_POST['email'] : ''; ?>" onFocus="this.value=''" maxlength="255"></label> 
<input type="submit" id="submit" name="submit" value="SIGN-UP" onclick="onSubmit();"> 
</fieldset> 
</form><!-- end sign up form --> 

Answer 1

チェックボックスがオフの場合、その値は送信されません。ボックスがチェックされていなければ、そのキーは存在しません。その存在を最初にissetでテストします。

if(isset($_POST[$field]) && $_POST[$field] == '') 

$fieldフィールドが必要なフィールドアレイ、NOTその$_POSTでかであるか否かによって決定されます。この条件はarray_key_existsを使用する前に条件内にネストされていないので、$_POST[$field]が存在するので、issetまたはarray_key_existsを使用する必要があります - 個人的にはissetが好きです。

Answer 2

<?php 

    require("connection.php"); 
    if(isset($_POST['submit']) && $_POST['submit'] == 'SIGN-UP') 
    { 
    $sql= mysql_query("INSERT INTO login (email,username,password) VALUES('$_POST[email]','$_POST[username]','$password')"); 


    $form_complete = FALSE; 

    // configure validation array 
    $validation = array(); 

    // check form submittal 
    if(!empty($_POST)) { 
    // Sanitise POST array 
    foreach($_POST as $key => $value) $_POST[$key] = remove_email_injection(trim($value)); 

    // Loop into required fields and make sure they match our needs 
    foreach($required_fields as $field) {  
    // the field has been submitted? 
    if(!array_key_exists($field, $_POST)) array_push($validation, $field); 

    // check there is information in the field? 
    if($_POST[$field] == '') array_push($validation, $field); 

    // validate the email address supplied 
    if($field == 'email') if(!validate_email_address($_POST[$field])) array_push($validation, $field); 
     } 

    // basic validation result 
    if(count($validation) == 0) { 
    // Prepare our content string 
    $email_content = 'New webinar attendee for Cancer Surveillance: ' . "\n\n"; 

    // simple email content 
    foreach($_POST as $key => $value) { 
    if($key != 'submit') $email_content .= $key . ': ' . $value . "\n"; 
      } 

    // if validation passed ok then send the email 
    //mail($email_to, $email_subject, $email_content); 

    // Update form switch 
      $form_complete = TRUE; 
     } 
    } 

    function validate_email_address($email = FALSE) { 
    return (preg_match('/^[^@\s]+@([-a-z0-9]+\.)+[a-z]{2,}$/i', $email))? TRUE : FALSE; 
    } 

    //function remove_email_injection($field = FALSE) { 
//  return (str_ireplace(array("\r", "\n", "%0a", "%0d", "Content-Type:", "bcc:","to:","cc:"), '', $field)); 
// } 


if($form_complete === FALSE): 
?> 





<form action="test1.php" method="post"> 
email:label>Email: <?php if(in_array('email', $validation)): ?><span class="error"><?php echo $error_messages['email']; ?></span><?php endif; ?><input type="text" id="email" name="email" value="<?php echo isset($_POST['email'])? $_POST['email'] : ''; ?>" onFocus="this.value=''" maxlength="255"></label> 
    <input type="submit" id="submit" name="submit" value="SIGN-UP" onclick="onSubmit();"> 

</form> 




OUTPUT SHOW Parse error: syntax error, unexpected $end