Question

I have problem with database. I want to add about 10 new rows after pageload. It should check if there is an article with id (that is actually loading). If its not, add 10 of that id with different tag id.

$sprawdz = "SELECT id_artykulow FROM tag_art WHERE id_artykulow='".$_GET['id']."' " ;
$miasto = mysql_query($sprawdz);   
$a = mysql_num_rows($miasto); 
while ($a<=10){ 
$zm = "SELECT id FROM tag_content ORDER BY RAND() LIMIT 1";
$sw = mysql_query($zm);
while($row3=mysql_fetch_array($sw)){
$zmienna = "INSERT INTO tag_art(id_artykulow, id_tagow) VALUES ('".$_GET['id']."', '".$row3['id']."' ) ";
$cokolwiek = mysql_query($zmienna);
}
$a++; 
}  

There is two tables. One tag_content with id (of the tags), and another tag_art with id_artykulow (= id of the article) and id_tagow (id of the tag taken from tag_content)
Don’t know why, but it doesn’t add 10 rows (it should be for example ten id_artykulow = 10, with different id_tagow). How to fix it?

Thx for help and let me know if u need more informations (like more code etc.)

Answer 1

why do you have 2 while loops?
cant you just replace

while ($a<=10){ 
$zm = "SELECT id FROM tag_content ORDER BY RAND() LIMIT 1";

with

if ($a<=10){ 
$zm = "SELECT id FROM tag_content ORDER BY RAND() LIMIT " . (10-$a);

or just let the databse do all the work by:

$query = "INSERT INTO tag_art(id_artykulow, id_tagow) SELECT '".$_GET['id']."', id  FROM tag_content ORDER BY RAND() LIMIT " . (10-$a);

(and i would also recomendate protection agains sql-injections, mysql_real_escape_string())