借助Regex进行字符串验证-PHP

Question

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.

Answer 1

如果您使用类似下面的内容，它将从字符串中去除空格。

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

Answer 2

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

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

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