get COUNT(*) from mysql_magic - php

Question

The following code retrieve the result from queries. Usually, I ask for SELECT... and I get a two-dimensional array but this time I need to get count from a table.
if(isset($_GET['query']))
{
$results = mysql_magic($_GET['query']);
$response = array();
//ERROR : Invalid argument supplied for foreach()
foreach($results as &$row)
{
$rowArray = array();
foreach($row as &$column)
{
$rowArray[] = $column;
}
$response[] = $rowArray;
}
$jsonData = json_encode($results);
}
This is a part of the function mysql_magic. In most cases, it returns mysql_fetch_all($req_result). In this case, it returns a row.
else if (startsWith($req_sql, 'select count(*)'))
{
$line = mysql_fetch_row($req_result);
return $line[0];
}
Why do I get an error "Invalid argument supplied for foreach()" since my result, a count, contains one row and one column?

Answer 1

I think that you are using mysql_magic($_GET['query']) should be mysql_query($_GET['query']). I see no reference in the code for a $_GET case. So $results is undefined due to php error?
if(isset($_GET['query']))
{
$results = mysql_query($_GET['query']);
$response = array();
//ERROR : Invalid argument supplied for foreach()
foreach($results as &$row)
{
$rowArray = array();
foreach($row as &$column)
{
$rowArray[] = $column;
}
$response[] = $rowArray;
}
$jsonData = json_encode($results);
}