Sanitization

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- PHP Manual
- Examples
- 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_charsfilter.default_flags = 0