noob：display err_msg on page

Question

データベースを作成するフォームがあり、エラー処理に問題があります。私はエラーが同じpgの小さなポップアップウィンドウに表示されるようにしたい。

<form id="form1" name="form1" method="post" action="mailform.php" onsubmit="MM_validateForm('Name','','R','Business Name','','R','Email Address','','R','How selling product','','R','Where did you hear about us','','R');return document.MM_returnValue"> 
    <div style="color:#FF0000; text-align:center;"><?php if(!empty($_GET['err_msg'])){echo $_GET['err_msg'];} ?></div> 
     <fieldset> 
     <legend>Contact form</legend> 
      <p class="first"> 
       <label for="name">First Name</label> 
       <input type="text" name="First Name" id="first_name" size="30" value="<?=htmlentities($profiledata['First_Name'])?>" /> 
      </p> 

     <p class="first"> 
       <label for="name">Last Name</label> 
       <input type="text" name="Last Name" id="last_name" size="30" value="<?=htmlentities($profiledata['Last_Name'])?>" /> 
      </p> 

      <p> 
       <label for="name">Phone Number</label> 
       <input type="text" name="Phone Number" id="phone number" size="30" value="<?=$profiledata['Phone_Number']?>" /> 
      </p> 
          <p> 
       <label for="email">Business Name</label> 
       <input type="text" name="Business Name" id="business name" size="30" value="<?=htmlentities($profiledata['Business_Name'])?>" /> 
      </p> 
          <p> 
       <label for="email">Web Address</label> 
       <input type="text" name="Web Address" id="web address" size="30" value="<?=$profiledata['Web_Address']?>" /> 
      </p> 
      <p> 
       <label for="email">Email</label> 
       <input type="text" name="Email Address" id="email address" size="30" value="<?=$profiledata['Email_Address']?>" /> 
      </p> 
     <p> 
      <img src="CaptchaSecurityImages.php?width=100&height=40&characters=5" /><br /> 
       <label for="security_code">Security Code: </label><input id="security_code" name="security_code" type="text" /> 
     </p>     
     </fieldset> 
     <fieldset>                   
      <p> 
       <label for="message">Describe how you plan on selling this product</label> 
       <textarea name="How selling product" id="How selling product" cols="30" rows="4"><?=htmlentities($profiledata['How_selling_product'])?></textarea> 
      </p>  
      <p> 
       <label for="message">Where did you hear about us?</label> 
       <textarea name="Where did you hear about us" id="Where did you hear about us" cols="30" rows="4"><?=htmlentities($profiledata['Where_did_you_hear_about_us'])?></textarea> 
      </p>      
     </fieldset> 
     <p class="submit"><button type="submit">Send</button></p> 

     <input name="mailform_address" type="hidden" value="email@address.com" /> 
    </form> 

エラー処理：

function valid_email($str) 
{ 
    return (! preg_match("/^([a-z0-9\+_\-]+)(\.[a-z0-9\+_\-]+)*@([a-z0-9\-]+\.)+[a-z]{2,6}$/ix", $str)) ? FALSE : TRUE; 
} 

function is_url($str) 
{ 
    return (! preg_match("/^((www)\.)?((\w+|[\d]?+)+(\.|\-)(\w+[\d]?+))+(\w)$/", $str)) ? FALSE : TRUE; 
} 

function valid_phone($str) 
{ 
    $Num = $str; 
    $Num = ereg_replace("([  ]+)","",$Num);; 
    $Num = eregi_replace("(\(|\)|\-|\+)","",$Num); 
    if(!is_numeric($Num)) 
    {  
     return FALSE; 
    } 
    else 
     return TRUE; 
} 

$form_field = array( 
          'First_Name'     => '', 
          'Last_Name'      => '', 
          'Business_Name'     => '', 
          'Phone_Number'     => '', 
          'Web_Address'     => '', 
          'Email_Address'     => '', 
          'How_selling_product'   => '', 
          'Where_did_you_hear_about_us' => '', 
         ); 
foreach($form_field as $key => $value){$profiledata[$key]=trim($_POST[$key]);} 

$_SESSION['profiledata'] = $profiledata; 

$emailto = NULL; 
$emailmessage = "Dealer Contact Form\n"; 
$emailsubject = "Dealer Contact Form"; 

if(!empty($_POST)){ 

    //echo "<pre>";print_r($_POST);die; 

    if($_SESSION['security_code'] != $_POST['security_code'] || empty($_SESSION['security_code'])) { 

     // Insert your code for showing an error message here 
     $err_msg = 'Sorry, you have provided an invalid security code'; 
     header("Location: reseller.php?err_msg=".urlencode($err_msg)); 
     return; 

    } else { 
     unset($_SESSION['security_code']); 
    } 

    $fname  = html_entity_decode(trim($_POST['First_Name'])); 
    $lname  = html_entity_decode(trim($_POST['Last_Name'])); 
    $company = html_entity_decode(trim($_POST['Business_Name'])); 
    $phone  = html_entity_decode(trim($_POST['Phone_Number'])); 
    $website = html_entity_decode(trim($_POST['Web_Address'])); 
    $email  = html_entity_decode(trim($_POST['Email_Address'])); 
    $notes  = "Lead Source: ".html_entity_decode(trim($_POST['Where_did_you_hear_about_us']))."\n"; 
    $notes  .= "Selling Method: ".html_entity_decode(trim($_POST['How_selling_product'])); 

    if(!valid_phone($phone)){ 
     $err_msg = 'Please enter valid Phone Number.'; 
     header("Location: reseller.php?err_msg=".urlencode($err_msg)); 
     return; 
    } 

    if(!is_url($website)){ 
     $err_msg = 'Please enter valid Web Address.'; 
     header("Location: reseller.php?err_msg=".urlencode($err_msg)); 
     return; 
    } 

    if(!valid_email($email)){ 
     $err_msg = 'Please enter valid Email.'; 
     header("Location: reseller.php?err_msg=".urlencode($err_msg)); 
     return; 
    } 

    if(!stristr($website,"http://") && !stristr($website,"https://") && $website){ 
     $website = "http://".$website; 
    } 

    $res = mysql_query("SELECT in_customer_id FROM tbl_customer WHERE st_company_name = '".addslashes($company)."'"); 
    if(mysql_num_rows($res)){ 
     $err_msg = 'Business Name already exists'; 
     header("Location: reseller.php?err_msg=".urlencode($err_msg)); 
     return; 
    } 

    $res = mysql_query("SELECT st_user_name,st_user_email_id FROM tbl_admin_user WHERE st_user_email_id='".addslashes($email)."' AND flg_is_delete=0"); 
    if(mysql_num_rows($res)){ 
     $err_msg = 'Email already exists'; 
     header("Location: reseller.php?err_msg=".urlencode($err_msg)); 
     return; 
    } 

私は正しい方向にいくつかの助けまたは少なくともナッジをいただければと思います。ありがとう！

Answer 1

「ポップアップ」の種類に応じて、サーバーから返信したメッセージを利用する、きれいにフォーマットされたメッセージを表示するクライアントサイドのJavaScriptを実装したいと思うかもしれません。

私はJQueryを使用しています。

Answer 2

これは問題ありませんか？

<html> 

<head> 
<script> 
function Start(page) { 
OpenWin = this.open(page, "CtrlWindow", "toolbar=no,menubar=no,location=no,scrollbars=yes,resizable=yes,width=600,height=200,left=" 
+((window.screen.width-600)/2)+",top="+((window.screen.height-200)/3)+""); 
} 
</script> 
</head> 

<body onload="Start('child.htm')"> 
This is parent. 
</body> 
</html>