Question

I have two tables in my database:

1) blog_table
2) content

In blog_table I have values called postID that may or may not match up to values called id in the table content. I am wanting to know how I can write a while loop or foreach loop that will cycle through content table and perform one action if the id equals the value of postID in the blog_table and perform a different action if it doesn’t.

Right now I can only get id = postID

$blog_table = $_REQUEST['blog_table'];  
$getblogtable = mysql_query("SELECT * FROM content WHERE type = '5' AND blogID = '{$_REQUEST['id']}' ORDER BY `order` ASC");

while ($row = mysql_fetch_assoc($getblogtable)) 
{
$getblogposts1 = mysql_query("SELECT postID FROM `$blog_table`");
while ($row1 = mysql_fetch_assoc($getblogposts1)) 
{
 if( $row1['postID'] == $row['id']) {
      echo "do something<br>";
 }else{
     echo "do something else<br>";
 }
} echo "<p></p>";
}

Answer 1

[Edit based on OP’s comments and revised question]

$getblogposts = mysql_query("SELECT * FROM content WHERE type = '5' AND blogID = '{$_REQUEST['id']}' ORDER BY `order` ASC");
while ($row = mysql_fetch_assoc($getblogposts))
{
    $matches = mysql_query("SELECT * FROM $blog_table WHERE postID = $row['id']");
    if (mysql_num_rows($matches) > 0)
    {
        // do something
    }
    else
    {
        // do something else
    }
}

Regarding a different design, I can’t say for sure that it’s necessary, but I don’t like running a loop of queries like this. I think one query should be enough to get everything you need in this case. Maybe if you describe your application, we could find a better query or more appropriate design.