how to get initiate parent id

[TheMarshal]

Hi all

 

May anyone tell me how to get first parent id from the child's id.

 

like 388 have parent id : 95 and 95 have initiate parent id is : 2, I want to get 2 when i get the value 388 from url?

 

i hope i explaned the question!

 

Thankx all in advance

Edited January 23, 2013 by TheMarshal

[trq]

The explanation of your issue leaves a lot to be desired. It also seems unrelated to this boards topic.

 

I suggest you try again, maybe even with some code.

[TheMarshal]

OK, thnax for trying help me

 

I have many of parent's id like 1,2,3,4,5,6..,109 .

 

those parents have many childrens like the parent no 3 have 200,201,202,....etc

 

also those childrens have many other childrens like the subparent no 201 have 500,501,505,509....etc

 

so now for example when i got to page 505 this page have details of this number and have beside some advertisements, those advertisements shows by the parent id and the initiate parent of this number 505 is 3 .

 

and if i in page 201 that give me initiate parent 3.

 

because 505 has parent id 201 and 201 has parent id 3 so i want 3 comes directly when i in page 505 or 201 and so on

 

i hope that help to explane what i mean

 

about code i tried with this code but look like not perfect with my issue

 

 $adsnourl = @intval($_REQUEST['ads']);
     $QueryAds = @mysql_query("SELECT * FROM ".CATEG." WHERE cat_parent=0");
     $allAds = array();
     while ($rowparent = @mysql_fetch_assoc($QueryAds)) {
        $parentno = $rowparent['cat_id'];
        $allAds[] = $parentno;
     }
        if (in_array($adsnourl,$allAds)) {
          $adsno = $adsnourl;
        } else {
           $firstParentQuery = @mysql_query("SELECT * FROM ".CONT." WHERE cont_id=".$adsnourl."");
           $firstParentFetch = @mysql_fetch_assoc($firstParentQuery);
           $firstParentrow   = $firstParentFetch['cont_parent'];


               if (in_array($firstParentrow,$allAds)) {
                   $adsno = $firstParentrow;
                } else {
                     $secondParentQuery = @mysql_query("SELECT * FROM ".CATEG." WHERE cat_id=".$firstParentrow."");
                     $secondParentFetch = @mysql_fetch_assoc($secondParentQuery);
                     $secondParentrow   = $secondParentFetch['cat_parent'];



                  if (in_array($secondParentrow,$allAds)) {
                     $adsno = $secondParentrow;
                   } else {
                     $thirdParentQuery = @mysql_query("SELECT * FROM ".CATEG." WHERE cat_id=".$secondParentrow."");
                     $thirdParentFetch = @mysql_fetch_assoc($thirdParentQuery);
                     $thirdParentrow   = $thirdParentFetch['cat_parent'];
                   if (in_array($thirdParentrow,$allAds)) {
                      $adsno = $thirdParentrow;
                   } else {
                       $fourthParentQuery = @mysql_query("SELECT * FROM ".CATEG." WHERE cat_id=".$thirdParentrow."");
                       $fourthParentFetch = @mysql_fetch_assoc($fourthParentQuery);
                       $fourthParentrow   = $fourthParentFetch['cat_parent'];
                     if (in_array($fourthParentrow,$allAds)) {
                        $adsno = $fourthParentrow;
                     } else {
                       $adsno = 0;
                     }
                   }
                   }


             }
        }

[trq]

You need to seriously look at using SQL joins. I don't want to be harsh, but, that is probably the worst code I have seen in a few years.

 

You might also want to look at recursion (in php) to provide an easy solution to your problem.

[TheMarshal]

Sounds good >> that is probably the worst code I have seen in a few years ... not whole life because i'm still novice in programming so i have hope to learn.

 

I will search for recursion in php & joins then i will see if that help or not!

 

Thank you

Edited January 24, 2013 by TheMarshal

[Barand]

Recursion : see http://forums.phpfreaks.com/topic/273565-how-to-get-initiate-parent-id/?do=findComment&comment=1410085

Edited February 4, 2013 by Barand

[Christian F.]

Hehe, nice one, barand. You actually had me going for a couple of secs there. Thought the browser wasn't registering the clicks.

 

Anyway, TheMarshal: If you read up in the PHP manual on user defined functions, you can see examples of recursive functions in there. Along with a few warnings about using recursion. Recursion is very powerful, but also easy to mess up in such a way that it will crash your script. So better make sure you've dotted all of your I's and crossed all of your T's.

 

PS: I took the liberty of moving this thread to the "PHP Coding Help" section, as this is more of a general PHP help topic than a maths help topic.

[Barand]

I thought it an apt definition of recursion