所以，我有一个非常奇怪的错误——一些高级 PHP 开发人员也可能被认为有些奇怪。
在第二个 foreach 语句中，我在该 foreach 语句中创建了一个数组“$reply_each”，它应该是“array_push()”-ed 到另一个名为“$recent_discussion_each['discussion_replies_array']”的数组中。这在第二个 foreach 语句中有效。但是一旦第二个 foreach 语句完成，“$reply_each”数组就消失了——就好像它超出了范围一样。为了确保这不是范围问题，我在函数的开头初始化了 $reply_each 但这没有帮助 - 它必须是别的东西。
请帮忙？
更新：我可能应该补充一点，当我在第二个 foreach 语句中对 $recent_discussion_each['discussion_replies_array'] 执行 count() 时，我得到正确的值 1。但是当我执行相同的 count() 时，但这次在外面在第二个 foreach 语句中，我得到了一个不正确的值 0。如果之前不清楚的话，这就是问题所在。
public function getRecentDiscussions($num_recent_discussions, $course_id) {
//
$this->load->database();
//
$recent_discussions_array = array();
//
// Construct query to fetch recent discussions along with their replies and some
// basic user info about the authors
$query_recent_discussions = $this->db->select('course_discussion.id AS course_discussion_id,
user.f_name,
user.l_name,
course_discussion.text,
course_discussion.posted_datetime,
course_discussion.is_reply,
course_discussion.parent_id
')
->join('user', 'course_discussion.owner = user.id')
->where('course_discussion.course', $course_id)
->limit($num_recent_discussions)
->get('course_discussion');
//
foreach($query_recent_discussions->result_array() as $row) {
//
// Figure out of this comment is a parent or a reply. If it is a parent (meaning is_reply
// is equal to 0), then treat it like one
if($row['is_reply'] == '0') {
//
$recent_discussion_each = array();
//
$recent_discussion_each['discussion_id'] = $row['course_discussion_id'];
$recent_discussion_each['discussion_owner_f_name'] = $row['f_name'];
$recent_discussion_each['discussion_owner_l_name'] = $row['l_name'];
$recent_discussion_each['discussion_body'] = $row['text'];
$recent_discussion_each['discussion_posted_datetime'] = $row['posted_datetime'];
$recent_discussion_each['discussion_replies_array'] = array();
//
array_push($recent_discussions_array, $recent_discussion_each);
}
//
// Else, it must be a reply since is_reply is not a 0
else {
//
// Look for the parent comment by going through the entire list of comments
foreach($recent_discussions_array as $potential_parent) {
//
// Check to see if this comment's (now known as a reply's) id matches
// the id of the comment currently in the position in the list of comments
if($row['parent_id'] == $potential_parent['discussion_id']) {
//
$reply_each = array();
//
$reply_each['reply_id'] = $row['course_discussion_id'];
$reply_each['reply_owner_f_name'] = $row['f_name'];
$reply_each['reply_owner_l_name'] = $row['l_name'];
$reply_each['reply_text'] = $row['text'];
$reply_each['reply_posted_datetime'] = $row['posted_datetime'];
$reply_each['reply_is_reply'] = $row['is_reply'];
$reply_each['reply_parent_id'] = $row['parent_id'];
//
array_push($potential_parent['discussion_replies_array'], $reply_each);
}
}
}
}
//
foreach($recent_discussions_array as $recent_discussion) {
echo ($recent_discussion['discussion_id'].' has the following replies: ');
foreach($recent_discussion['discussion_replies_array'] as $reply) {
echo($reply['reply_id']);
}
}
//
return $recent_discussions_array;
//
// end
//
}