範例 #1 消毒和驗證電子郵箱地址
<?php
$a = 'joe@example.org';
$b = 'bogus - at - example dot org';
$c = '(bogus@example.org)';
$sanitized_a = filter_var($a, FILTER_SANITIZE_EMAIL);
if (filter_var($sanitized_a, FILTER_VALIDATE_EMAIL)) {
echo "這個 (a) 過濾後的電子郵件地址被認為是有效的。\n";
}
$sanitized_b = filter_var($b, FILTER_SANITIZE_EMAIL);
if (filter_var($sanitized_b, FILTER_VALIDATE_EMAIL)) {
echo "這個過濾後的電子郵件地址被認為是有效的。";
} else {
echo "這個 (b) 過濾後的電子郵件地址被認為是無效的。\n";
}
$sanitized_c = filter_var($c, FILTER_SANITIZE_EMAIL);
if (filter_var($sanitized_c, FILTER_VALIDATE_EMAIL)) {
echo "這個 (c) 過濾後的電子郵件地址被認為是有效的。\n";
echo "過濾前： $c\n";
echo "過濾後： $sanitized_c\n";
}
?>以上範例會輸出：
This (a) sanitized email address is considered valid. This (b) sanitized email address is considered invalid. This (c) sanitized email address is considered valid. Before: (bogus@example.org) After: bogus@example.org