PHP的while循环内foreach循环

Question

Here this line $find_cond = str_replace('|',' ',$rem_exp); returns 225 and 245 number.

I want to get the records based on these two id number. But this below code returns the output repeatedly.

How do I properly put the while loop code inside a foreach?

foreach($arr_val as $key => $val)
{
    $c_subsubtopic = str_replace('-','_',$subsubtopic);
    $rem_exp = $val[$c_subsubtopic];
    $find_cond = str_replace('|',' ',$rem_exp);
    $sql = "SELECT a.item_id, a.item_name, a.item_url, b.value_url, b.value_name, b.value_id FROM ".TBL_CARSPEC_ITEMS." a, ".TBL_CARSPEC_VALUES." b WHERE a.item_id = b.item_id AND a.item_url = '".$subsubtopic."' AND value_id = '".$find_cond."' AND a.status = '1'";
    while($r = mysql_fetch_array(mysql_query($sql)))
    {
        echo $r['value_name'];
    }
}

Answer 1

The problem is that you are redoing the sql query at every iteration of the loop, thus resetting the results internal pointer, so you keep fetching the same array.

$res = mysql_query($sql)

should be on it's own line before the while loop, and then

while($r = msql_fetch_array($res))

This will properly increment through the $res list.

Answer 2

Try this and you are done

As you were getting may get multiple id in the string after replacing it so its better to use IN the where clause

foreach($arr_val as $key => $val)
{
    $c_subsubtopic = str_replace('-','_',$subsubtopic);
    $rem_exp = $val[$c_subsubtopic];
    $find_cond = str_replace('|',',',$rem_exp);
    $sql = "SELECT a.item_id, a.item_name, a.item_url, b.value_url, b.value_name, b.value_id FROM ".TBL_CARSPEC_ITEMS." a, ".TBL_CARSPEC_VALUES." b WHERE a.item_id = b.item_id AND a.item_url = '".$subsubtopic."' AND value_id IN('".$find_cond."') AND a.status = '1'";
    while($r = mysql_fetch_array(mysql_query($sql)))
    {
        echo $r['value_name'];
    }
}