Php/docs/filter.examples.sanitization
Sanitization
Example #1 Sanitizing and validating email addresses
<?php$a = '[email protected]';$b = 'bogus - at - example dot org';$c = '([email protected])';$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: ([email protected]) After: [email protected]
Example #2 Configuring a default filter
filter.default = full_special_charsfilter.default_flags = 0
