ExtractEmails in PHP

include_once("../../business/connection_b.php");
$content=file_get_contents("emails.txt");
$emailArray=$result=array();
$pattern="/[^a-zA-Z0-9\.]+?([a-zA-Z0-9\.]+@[a-zA-Z0-9\.-]+)[^a-zA-Z0-9\.]/Uis";
preg_match_all($pattern, $content, $result, PREG_SET_ORDER);
$result=array_unique($result);
$result=array_values($result);
print_r($result); die;
$c=count($result);
for($i=0;$i<$c;$i++){
$emailArray[]=trim($result[$i][1]);
}
echo print_r($emailArray);

?>