PHP filters

Filters can be used to both sanitize and validate data.

Validating Integer

This code will check if the value is an integer, 10.5 obviously isn't:

<?php
$int = 10.5;

if (filter_var($int, FILTER_VALIDATE_INT)) {
    echo("Integer is valid");
} else {
    echo("Integer is not valid");
}
?>

Filters available are:

• int
• boolean
• float
• validate_regexp
• validate_url
• validate_email
• validate_ip
• string
• stripped
• encoded
• special_chars
• full_special_chars
• unsafe_raw
• email
• url
• number_int
• number_float
• magic_quotes
• callback