我有一些功能可以在我的页面上生成文章+与他们相关的评论：
function comment_form($id) { // generates a comment box form for every article on the page
global $user_data;
if (logged_in() === true) {
echo "
<form method='post' action='' class='comments_form'>
<input type='text' name='username' placeholder='your name... *' id='name' value='{$user_data['username']}'>
<div class='captcha'>" . create_captcha() . "</div>
<textarea name='comments' id='textarea' placeholder='your comment... *' cols='30' rows='6'></textarea>
<input type='hidden' name='blog_id' value='$id'>
<input type='submit' name='submit' id='post' value='post'>
</form>
<hr class='artline'>";
}
}
function list_articles($rows) {
if (empty($rows)) {
return "There are no Articles to display";
}
$previous_blog_id = 0;
$content = '';
foreach ($rows as $row) {
if ($previous_blog_id != $row['content_id']) { // the blog id changed
if ($previous_blog_id != 0) { // not the first section, close out the previous section
$content .= comment_form($previous_blog_id);
}
// start a new blog section
$content .= "<h5 class='posted_by'>Posted by {$row['posted_by']} on {$row['date']}</h5>
<h1 class='content_headers'>{$row['title']}</h1>
<article>{$row['content']}</article>
<hr class='artline'>";
$previous_blog_id = $row['content_id'];
}
if (!empty($row['comment_by']) && !empty($row['comments'])) {
$content .= "<div class='commented_by'>User: {$row['comment_by']} </div>
<div class='comments'>Comment: {$row['comments']}</div>
<hr class='artline2'>";
}
}
if ($previous_blog_id != 0) {
$content .= comment_form($previous_blog_id);
}
return $content;
}
function insert_comments($comments, $comment_by, $blog_id) {
include('core/db/db_connection.php');
$comment_by = sanitize($comment_by);
$comments = sanitize($comments);
$blog_id = (int)$blog_id;
$sql = "
INSERT INTO article_comments (
comments,
comment_by,
blog_id
)
VALUES (
'$comments',
'$comment_by',
'$blog_id'
)
";
mysqli_query($dbCon, $sql);
}
我生成一个简单的数学验证码，如下所示：
function generate_captcha($num1, $num2) { // generates 2 random numbers
$num1 = (int)$num1;
$num2 = (int)$num2;
$rand_num_1 = mt_rand($num1, $num2);
$rand_num_2 = mt_rand($num1, $num2);
$result = $rand_num_1 + $rand_num_2;
return $result;
}
function create_captcha() { // displays captcha on the page
$num1 = generate_captcha(1, 20);
$num2 = generate_captcha(1, 20);
echo $num1 . ' + ' . $num2 . ' = ';
echo '<input type="text" name="captcha_results" size="2">';
echo '<input type="hidden" name=\'num1\' value=' . $num1 . '; ?>';
echo '<input type="hidden" name=\'num2\' value=' . $num2 . '; ?>';
}
正如您所看到的，我在我的create_captcha()函数中使用了comment_form()函数，因为我希望每个评论框都有一个与之关联的验证码。每篇文章都有自己的评论框。
上面的代码显示了我拥有的每个评论框的验证码字段，这就是我想要的。但是 - 它会将所有注释框移到内容之上，使其看起来像这样：
|-------------------------------------| // comments form for article 1
|Name: New User |
|Comment: New comment ! |
| |
|-------------------------------------|
[Submit] [captcha field]
|-------------------------------------| // comments form for article 2
|Name: New User |
|Comment: New comment ! |
| |
|-------------------------------------|
[Submit] [captcha field]
Article_1 title: LOREM IPSUM
Content: LOREM IPSUM DOLOR SIT AMET....
-------------------------------------- //comments
Name: User0
Comment: Great article!
--------------------------------------
Name: User1
Comment: Great article! - 2nd comment
-------------------------------------- // end comments
============================================================
Article_2 title: LOREM IPSUM
Content: LOREM IPSUM DOLOR SIT AMET....
-------------------------------------- //comments
Name: User0
Comment: Great article!
--------------------------------------
Name: User1
Comment: Great article! - 2nd comment
-------------------------------------- // end comments
我期待的行为是：
Article_1 title: LOREM IPSUM
Content: LOREM IPSUM DOLOR SIT AMET....
-------------------------------------- //comments
Name: User0
Comment: Great article!
--------------------------------------
Name: User1
Comment: Great article! - 2nd comment
-------------------------------------- // end comments
|-------------------------------------| // comments form for article 1
|Name: New User |
|Comment: New comment ! |
| |
|-------------------------------------|
[Submit] [captcha field]
============================================================
Article_2 title: LOREM IPSUM
Content: LOREM IPSUM DOLOR SIT AMET....
-------------------------------------- //comments
Name: User0
Comment: Great article!
--------------------------------------
Name: User1
Comment: Great article! - 2nd comment
-------------------------------------- // end comments
|-------------------------------------| // comments form for article 2
|Name: New User |
|Comment: New comment ! |
| |
|-------------------------------------|
[Submit] [captcha field]
是否与我插入generate_captcha函数的位置有关，导致注释框浮动到内容之上？
编辑：如果我返回表单而不是回显它 - 这是有效的。评论表格放在相应的文章下面：
function comment_form($id) {
global $user_data;
if (logged_in() === true) {
return <<<EOT
<form method='post' action='' class='comments_form'>
<input type='text' name='username' placeholder='your name... *' id='name' value='{$user_data['username']}'>
<textarea name='comments' id='textarea' placeholder='your comment... *' cols='30' rows='6'></textarea>
<input type='hidden' name='blog_id' value='$id'>
<input type='submit' name='submit' id='post' value='post'>
</form>
<hr class='artline'>
EOT;
但是，由于我必须使用<<<EOT，我无法插入函数。如何将create_captcha函数插入上面的??
编辑2：这不会返回预期的验证码表单，但它似乎将评论表单放在其位置......
function comment_form($id, $captcha) {
global $user_data;
if (logged_in() === true) {
return <<<EOT
<form method='post' action='' class='comments_form'>
<input type='text' name='username' placeholder='your name... *' id='name' value='{$user_data['username']}'>
<textarea name='comments' id='textarea' placeholder='your comment... *' cols='30' rows='6'></textarea>
<input type='hidden' name='blog_id' value='$id'>
<input type='submit' name='submit' id='post' value='post'>
</form>
<hr class='artline'>
EOT;
}
}
function list_articles($rows) {
if(empty($rows)){
return "There are no Articles to display";
}
$create_blog_captcha = create_blog_captcha();
$previous_blog_id = 0;
$content = '';
foreach($rows as $row) {
if ($previous_blog_id != $row['content_id']) { // the blog id changed
if($previous_blog_id != 0) { // not the first section, close out the previous section
$content .= comment_form($previous_blog_id, $create_blog_captcha);
}
// start a new blog section
$content .= "<h5 class='posted_by'>Posted by {$row['posted_by']} on {$row['date']}</h5>
<h1 class='content_headers'>{$row['title']}</h1>
<article>{$row['content']}</article>
<hr class='artline'>";
$previous_blog_id = $row['content_id'];
}
if (!empty($row['comment_by']) && !empty($row['comments'])) {
$content .= "<div class='commented_by'>User: {$row['comment_by']} </div>
<div class='comments'>Comment: {$row['comments']}</div>
<hr class='artline2'>";
}
}
if($previous_blog_id != 0){
$content .= comment_form($previous_blog_id, $create_blog_captcha);
}
return $content;
}
function create_blog_captcha() {
$num1 = generate_captcha(1, 20);
$num2 = generate_captcha(1, 20);
$captchanum = $num1 . ' + ' . $num2 . ' = ';
$captchanum .= '<input type="text" name="captcha_results" size="2">
<input type="hidden" name=\'num1\' value=' . $num1 . '>
<input type="hidden" name=\'num2\' value=' . $num2 . '>';
return $captchanum;
}
如何返回create_blog_captcha的值？我显然做错了......
答案 0 :(得分：2)
在函数create_captcha（）中，您尚未关闭隐藏的输入字段，因此您将破坏整个文档流。
function create_captcha() {
$num1 = generate_captcha(1, 20);
$num2 = generate_captcha(1, 20);
return $num1 . ' + ' . $num2 . ' =
<input type="text" name="captcha_results" size="2">
<input type="hidden" name=\'num1\' value=' . $num1 . ' />
<input type="hidden" name=\'num2\' value=' . $num2 . ' />';
}
正如您所指出的，该函数先前已回显内容，而不是作为字符串返回到输出html的其他函数。