Question

Ok, so if I set into a variable an sql_query like so:

$query = mysql_query("..");

and call multiple mysql_result’s like so:

mysql_result($query, 0);
mysql_result($query, 1);
mysql_result($query, 2);

How many queries will the page call to the server?
Only once? or three times?

Answer 1

When you execute mysql_query, It executes the sql and it keeps the result in an internal result structure. Next time when you call mysql_result, it fetches from that internal result.

For buffered query the reusult will be copying from MySQL server to PHP as soon as mysql_query is executed. For un-buffered query it’ll be copied lazily.

So in both case Query executes only one time. But for un-buffered query it’ll be fetched from MySQL server. every time you call mysql_result or mysq_fetch_*.^{Buffered and Unbuffered queries}