first, you have to pass the array with the data to the function
second, the name of the function should start with lower character (php conventions)
try this
function extractNameArray($array, $venue) {
$results = array();
foreach($array as $key=>$value) {
if(isset($value['table']['venue'])&&$value['table']['venue']==$venue) {
isset($value['table']['name']) && $results[] = $value['table']['name'];
}
}
return $results;
}