--TEST--
filter_var() and FILTER_SANITIZE_EMAIL
--SKIPIF--
<?php if (!extension_loaded("filter")) die("skip"); ?>
--FILE--
<?php

var_dump(filter_var("a@b.c", FILTER_SANITIZE_EMAIL));
var_dump(filter_var("a[!@#$%^&*()@a@#$%^&*(.com@#$%^&*(", FILTER_SANITIZE_EMAIL));
var_dump(filter_var("white space here \ \ \" som more", FILTER_SANITIZE_EMAIL));
var_dump(filter_var("", FILTER_SANITIZE_EMAIL));
var_dump(filter_var("123456789000000", FILTER_SANITIZE_EMAIL));
    
echo "Done\n";
?>
--EXPECTF--    
string(5) "a@b.c"
string(30) "a[!@#$%^&*@a@#$%^&*.com@#$%^&*"
string(21) "whitespaceheresommore"
string(0) ""
string(15) "123456789000000"
Done