Here is my source ...

<?php

$conn = ifx_connect("stores7@test","informix","test");
$query = "SELECT * FROM customers";

$rid = ifx_query($query,$conn);
$rowcount = ifx_affected_rows($rid);

echo $rowcount;

?>

The value of $rowcount is 1!  Why? The real row count is 150!

My Configuration is ...

configure  --prefix=/home --with-apache=/home/tmp/apache_1.3.3 --with-gd=no --with-mysql=/home/mysql --with-informix=/usr/inf --with-imap=/home --with-config-file-path=/home/etc --with-exec-dir=/home/libexec --enable-track-vars=yes --enable-memory-limit=yes