基本上，我正在制作一个评论表单，用户在其中填写有关特定产品的项目，并在提交表单时调用 process.php 来验证表单，并在提交无错误时向我发送电子邮件。然后它将用户返回到表单页面并显示已提交的错误或表示已成功提交，这一切都很好，但我现在需要做的是当正确填写表单时我仍然想要电子邮件并被返回到表单的页面，同时也将数据插入到我的数据库中。我的表单验证效果很好，直到我尝试弹出一些代码以插入数据库，然后我得到这些错误......
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/XZXZ/support/database.inc:16) in /home/XZXZ/public_html/Reviews/process.php on line 113
Warning: Cannot modify header information - headers already sent by (output started at /home/XZXZ/support/database.inc:16) in /home/XZXZ/public_html/Reviews/process.php on line 117
我只需要知道我可以在哪里弹出它以避免这些错误并且仍然可以正常工作。下面看一下 process.php 文件：
<?php
if( isset($_POST) ){
//form validation vars
$formok = true;
$errors = array();
//sumbission data
$ipaddress = $_SERVER['REMOTE_ADDR'];
$sub_date = date('d/m/Y');
$sub_time = date('H:i:s');
//form data
$sub_date = $_POST['sub_date'];
$sub_time = $_POST['sub_time'];
$review_title = $_POST['review_title'];
$rating = $_POST['rating'];
$pros = $_POST['pros'];
$cons = $_POST['cons'];
$best_uses = $_POST['best_uses'];
$comments = $_POST['comments'];
$upload = $_POST['upload'];
$recommend = $_POST['recommend'];
$reviewer_name = $_POST['reviewer_name'];
$reviewer_desc = $_POST['reviewer_desc'];
$reviewer_loc = $_POST['reviewer_loc'];
//form validation to go here....
}
//validate review title is not empty
if(empty($review_title)){
$formok = false;
$errors[] = "You have not entered a title for this review";
}
//validate rating is selected
if (isset ($_POST['rating']) && ($_POST['rating'] == '' )) {
$formok = FALSE;
$errors[] = "You have not selected a rating for the product";
}
//validate pros is not empty
if(empty($pros)){
$formok = false;
$errors[] = "You have not entered any pros";
}
//validate cons is not empty
if(empty($cons)){
$formok = false;
$errors[] = "You have not entered any cons";
}
//validate name is not empty
if(empty($reviewer_name)){
$formok = false;
$errors[] = "You have not entered your name";
}
//validate desc is not empty
if(empty($reviewer_desc)){
$formok = false;
$errors[] = "You have not entered your description";
}
//validate location is not empty
if(empty($reviewer_loc)){
$formok = false;
$errors[] = "You have not entered your location";
}
//send email if all is ok
if($formok){
$headers = "From: reviews@XZXZ.com" . "\r\n";
$headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";
$emailbody = "<p>You have received a new product review pending approval from XZXZ.com</p>
<p><strong>Review Title: </strong> {$review_title} </p>
<p><strong>Rating: </strong> {rating} </p>
<p><strong>Pros: </strong> {$pros} </p>
<p><strong>Cons: </strong> {$cons} </p>
<p><strong>Best Uses: </strong> {$best_uses} </p>
<p><strong>Comments: </strong> {$comments} </p>
<p><strong>Upload: </strong> {$upload} </p>
<p><strong>Recommend: </strong> {$recommend} </p>
<p><strong>Name: </strong> {$reviewer_name} </p>
<p><strong>Description: </strong> {$reviewer_desc} </p>
<p><strong>Location: </strong> {$reviewer_loc} </p>
<p>This message was sent from the IP Address: {$ipaddress} on {$date} at {$time}</p>";
mail("XX@XZXZ.com","New Pending Review",$emailbody,$headers);
//insert to database
require("/home/XZXZ/support/database.inc");
$SQL="INSERT INTO 'XZXZ_rvs'.'reviews_prod' (sub_date, sub_time, review_title, rating, pros, cons, best_uses, comments, upload, recommend, reviewer_name, reviewer_desc, reviewer_loc) VALUES ('$_POST[$sub_date]','$_POST[$sub_time]','$_POST[$review_title]','$_POST[$rating]','$_POST[$pros]','$_POST[$cons]','$_POST[$best_uses]','$_POST[$comments]','$_POST[$upload]','$_POST[$recommend]','$_POST[$reviewer_name]','$_POST[$reviewer_desc]','$_POST[$reviewer_loc]')";
}
//what we need to return back to our form
$returndata = array(
'posted_form_data' => array(
'review_title' => $review_title,
'rating' => $rating,
'pros' => $pros,
'cons' => $cons,
'best_uses' => $best_uses,
'comments' => $comments,
'upload' => $upload,
'recommend' => $recommend,
'reviewer_name' => $reviewer_name,
'reviewer_desc' => $reviewer_desc,
'reviewer_loc' => $reviewer_loc
),
'form_ok' => $formok,
'errors' => $errors
);
//if this is not an ajax request
if(empty($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) !== 'xmlhttprequest'){
//set session variables
session_start();
$_SESSION['cf_returndata'] = $returndata;
//redirect back to form
header('location: ' . $_SERVER['HTTP_REFERER']);
}