- var_dump: documentation ( source)
- preg_match_all: documentation ( source)
<?php
$re = "/[\\w-+]+(?:\\.[\\w-+]+)*@(?:[\\w-]+\\.)+[a-zA-Z]{2,7}/i";
$str = "sad@wtasd.com,asdda@gmna.lt;asdasd@nano.lt";
preg_match_all($re, $str, $matches);
var_dump($matches);
?>