In article <Pine.OSF.3.91.1010806142332.22209D-100000@leofric>,
[EMAIL PROTECTED] (Ajdin Brandic) wrote:
> I'm trying to get number of rows from a query. All works fine until
> the result is 0. Then query executes fine, returns 0 rows but mysql_numrows
> failes.
>
> $query="select * from mytable";
> $result=mysql_query($query) or die("select failed");
mysql_query() returns a result set identifier if the *query was valid*
(regardless of whether any rows were returned) or else false if the query
was not valid. So the line above is "If $query is valid, assign the result
set identifier to $result; but if $query was not valid, die with this
message..." This is different from your next line:
$num_rows=mysql_numrows($result) or die("select count failed");
mysql_num_rows() returns the number of rows in the result set. So this
line is "If $query found *one or more* rows, assign the row count to
$num_rows; but if $query found *zero* rows, die with this message..."
See how they differ? (Drop the second "or die..." if you want the script
to continue even where no rows were returned.)
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