filter-php-examples-php-sanitization-3

  • Examples

    • Sanitization

  • Sanitization

    • Sanitization

    Sanitization

    Example #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";    
    }
    ?>

    The above example will output:

    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

    Example #2 Configuring a default filter

    filter.default = full_special_chars
    filter.default_flags = 0