正则表达式清理(PHP)

function slug($z){
    $z = strtolower($z);
    $z = preg_replace('/[^a-z0-9 -]+/', '', $z);
    $z = str_replace(' ', '-', $z);
    return trim($z, '-');
}

第一个去掉不需要的字符

$new_string = preg_replace("/[^a-zA-Z0-9\s]/", "", $string);

然后更改解封空间

$url = preg_replace('/\s/', '-', $new_string);

最后对其进行编码以备使用

$new_url = urlencode($url);

试试这个

 function clean($string) {
       $string = str_replace(' ', '-', $string); // Replaces all spaces with hyphens.
       $string = preg_replace('/[^A-Za-z0-9\-]/', '', $string); // Removes special chars.

       return preg_replace('/-+/', '-', $string); // Replaces multiple hyphens with single one.
    }

用途:

echo clean('a|"bc!@£de^&$f g');

意志产出: abcdef-g

来源: https://stackoverflow.com/a/14114419/2439715

这将在Unix shell中实现(我刚在MacOS上尝试过):

$ tr -cs A-Za-z '-' < infile.txt > outfile.txt

我是从一篇博客上得到这个想法的 More Shell, Less Egg

所有以前的asnwers都处理url,但如果有人需要清理登录字符串(例如)并将其保留为文本,请执行以下操作:

function sanitizeText($str) {
    $withSpecCharacters = htmlspecialchars($str);
    $splitted_str = str_split($str);
    $result = '';
    foreach ($splitted_str as $letter){
        if (strpos($withSpecCharacters, $letter) !== false) {
            $result .= $letter;
        }
    }
    return $result;
}

echo sanitizeText('ОРРииыфвсси ajvnsakjvnHB "&nvsp;\n" <script>alert()</script>');
//ОРРииыфвсси ajvnsakjvnHB &nvsp;\n scriptalert()/script
//No injections possible, all info at max keeped