my code is this:
$query1="select * from patient where id=".$_POST['txt'];
it works but
i think because i have error in next line:
*Warning*: mysql_num_rows() expects parameter 1 to be resource, boolean


i echoed $ query1 and the result was this=>select * from patient where id=1
maybe  it can't convert $_POST['txt'] from String to integer and then it
can't get my $num
it is int in my mysql
how can i correct $query1?

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