Analyze the processing process and principle of visible Reply to Discuz Forum

You can also add hidden tags to the reply content. as long as you use the hide tag permission, when the user replies to the topic, the content will be displayed and the reply will be visible to visitors, when a user uses the hide tag when posting a topic, the discuzcode function is called to parse the discuz code when releasing the topic. the hidden tag can also be added when parsing the content of the hide tag reply, as long as the user uses the hide label permission, when the user replies to the topic, the content will also be displayed as a reply, which is also valid for tourists, when a user uses the hide tag when posting a topic, it calls DiscuzCode function pair DiscuzThe code is parsed. parse the hide tag section:
If ($ parsetype! = 1 & strpos ($ msglower, '[/hide]')! ==False & $ pid ){
If (strpos ($ msglower, '[hide]')! = FALSE ){
If ($ authorreplyexist === null ){
$ Posttable = getposttablebytid ($ _ G ['tid']);
$ Authorreplyexist =! $ _ G ['forum'] ['isderator']? DB: result_first ("SELECT pid FROM ". DB: table ($ posttable ). "WHERE tid = '$ _ G [tid]' AND ". ($ _ G ['uid']? "Authorid = '$ _ G [uid]'": "authorid = 0 AND useip = '$ _ G [clientip]'"). "LIMIT 1"): TRUE;
}
If ($ authorreplyexist ){
$ Message = preg_replace ("/[hide] s *(.*?) S * [/hide]/is ", tpl_hide_reply (), $ message );
} Else {
$ Message = preg_replace ("/[hide] (. *?) [/Hide]/is ", tpl_hide_reply_hidden (), $ message );
$ Message. ='