在Regex-PHP的帮助下进行字符串验证

I want a regex that can validate RegX to ensure no white space/escape characters can be used, especially CR and LF.

Any help would be appreciated.

If you use something like below, it will strip white spaces from a string.

$stripped_string = preg_replace("/[\s]/", "", $string);

Regex is not needed here. Just use method strpos(), here's reference.

And use it to see, if there are any invalid characters rpesent:

$needles = array("
", "", "\t", " ", ...);
foreach($needles as $needle) {
    $res = strpos($haystack, $needle, $offset);
    if ($res !== false) ...do something
}