## Sanitization

Beispiel #1 Sanitizing and validating email addresses

    <?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 "This (a) sanitized email address is considered valid.\n";
    }

    $sanitized_b = filter_var($b, FILTER_SANITIZE_EMAIL);
    if (filter_var($sanitized_b, FILTER_VALIDATE_EMAIL)) {
        echo "This sanitized email address is considered valid.";
    } else {
        echo "This (b) sanitized email address is considered invalid.\n";
    }

    $sanitized_c = filter_var($c, FILTER_SANITIZE_EMAIL);
    if (filter_var($sanitized_c, FILTER_VALIDATE_EMAIL)) {
        echo "This (c) sanitized email address is considered valid.\n";
        echo "Before: $c\n";
        echo "After:  $sanitized_c\n";
    }
    ?>

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

    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

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