Why does this work:

function myfunction($v) {
    $query = $v['host'] == '1';
    return ( $query );
}

$output = array_filter($recordset,myfunction);
print_r($output);

Whereas this script, which tries to accomplish the same thing with variables, does not?

$column1 = 'host';
$value1 = 1;
$query1 = '$v[\''.$column1.'\'] == '.$value1;

function myfunction($v) {
    $query = $GLOBALS['query1'];
    return ( $query );
}

$output = array_filter($recordset,myfunction);
print_r($output);

Any help would be great. Thanks!