This tutorial will show you some validations we require in most of the cases. These are given below one by one.
1. Check if an email address is injected
//validate against any email injection attempts
function is_email_injected($email) {
$injections = array('(\n+)',
'(\r+)',
'(\t+)',
'(%0A+)',
'(%0D+)',
'(%08+)',
'(%09+)'
);
$inject = join('|', $injections);
$inject = "/$inject/i";
if (preg_match($inject, $email)) {
return true;
} else {
return false;
}
}