Question

除了这些字符. = $ ' - € %

Answer 1

这是一个巧妙的方法：

preg_replace("#[[:punct:]]#", "", $target);

Answer 2

由于您需要匹配一些Unicode字符（€），因此使用正则表达式是明智的。模式\p{P}匹配任何已知的标点符号，并且断言将您想要的特殊字符排除在消失之外：

 $text = preg_replace("/(?![.=$'€%-])\p{P}/u", "", $text);

Answer 3

<?
$whatToStrip = array("?","!",",",";"); // Add what you want to strip in this array
$test = "Hi! Am I here?";
echo $test."\n\n";
echo str_replace($whatToStrip, "", $test);

Demo here

或当然更短：

$test = str_replace(array("?","!",",",";"), "", $test);

Source from 1st example of str_replace manual

Answer 4

preg_replace("[^-\w\d\s\.=$'€%]",'',$subject)

虽然更容易指定要删除的字符，而不是字符（来自未知集），但您不想剥离。

Answer 5

尝试：

preg_replace("/[^\w-\p{L}\p{N}\p{Pd}\$\.€%']/", "", 'YOUR DATA');

你没有提到你是否想要空格，所以也会删除它。

Answer 6

问题：

需要将字符串保存为带有特定标点符号的alphaNum，并且不希望完全丢弃带有特殊标点符号的字符。

解决方案：

class ClassName {

  protected static $cleanChars = array(
    '&lt;' => '', '&gt;' => '', '&#039;' => '', '&amp;' => '',
    '&quot;' => '', 'À' => 'A', 'Á' => 'A', 'Â' => 'A', 'Ã' => 'A', 'Ä' => 'Ae',
    '&Auml;' => 'A', 'Å' => 'A', 'Ā' => 'A', 'Ą' => 'A', 'Ă' => 'A', 'Æ' => 'Ae',
    'Ç' => 'C', 'Ć' => 'C', 'Č' => 'C', 'Ĉ' => 'C', 'Ċ' => 'C', 'Ď' => 'D', 'Đ' => 'D',
    'Ð' => 'D', 'È' => 'E', 'É' => 'E', 'Ê' => 'E', 'Ë' => 'E', 'Ē' => 'E',
    'Ę' => 'E', 'Ě' => 'E', 'Ĕ' => 'E', 'Ė' => 'E', 'Ĝ' => 'G', 'Ğ' => 'G',
    'Ġ' => 'G', 'Ģ' => 'G', 'Ĥ' => 'H', 'Ħ' => 'H', 'Ì' => 'I', 'Í' => 'I',
    'Î' => 'I', 'Ï' => 'I', 'Ī' => 'I', 'Ĩ' => 'I', 'Ĭ' => 'I', 'Į' => 'I',
    'İ' => 'I', 'Ĳ' => 'IJ', 'Ĵ' => 'J', 'Ķ' => 'K','Ł' => 'K', 'Ľ' => 'K',
    'Ĺ' => 'K', 'Ļ' => 'K', 'Ŀ' => 'K', 'Ñ' => 'N', 'Ń' => 'N', 'Ň' => 'N',
    'Ņ' => 'N', 'Ŋ' => 'N', 'Ò' => 'O', 'Ó' => 'O', 'Ô' => 'O', 'Õ' => 'O',
    'Ö' => 'Oe', '&Ouml;' => 'Oe', 'Ø' => 'O', 'Ō' => 'O', 'Ő' => 'O', 'Ŏ' => 'O',
    'Œ' => 'OE', 'Ŕ' => 'R', 'Ř' => 'R', 'Ŗ' => 'R', 'Ś' => 'S', 'Š' => 'S',
    'Ş' => 'S', 'Ŝ' => 'S', 'Ș' => 'S', 'Ť' => 'T', 'Ţ' => 'T', 'Ŧ' => 'T',
    'Ț' => 'T', 'Ù' => 'U', 'Ú' => 'U', 'Û' => 'U', 'Ü' => 'Ue', 'Ū' => 'U',
    '&Uuml;' => 'Ue', 'Ů' => 'U', 'Ű' => 'U', 'Ŭ' => 'U', 'Ũ' => 'U', 'Ų' => 'U',
    'Ŵ' => 'W', 'Ý' => 'Y', 'Ŷ' => 'Y', 'Ÿ' => 'Y', 'Ź' => 'Z', 'Ž' => 'Z',
    'Ż' => 'Z', 'Þ' => 'T', 'à' => 'a', 'á' => 'a', 'â' => 'a', 'ã' => 'a',
    'ä' => 'ae', '&auml;' => 'ae', 'å' => 'a', 'ā' => 'a', 'ą' => 'a', 'ă' => 'a',
    'æ' => 'ae', 'ç' => 'c', 'ć' => 'c', 'č' => 'c', 'ĉ' => 'c', 'ċ' => 'c',
    'ď' => 'd', 'đ' => 'd', 'ð' => 'd', 'è' => 'e', 'é' => 'e', 'ê' => 'e',
    'ë' => 'e', 'ē' => 'e', 'ę' => 'e', 'ě' => 'e', 'ĕ' => 'e', 'ė' => 'e',
    'ƒ' => 'f', 'ĝ' => 'g', 'ğ' => 'g', 'ġ' => 'g', 'ģ' => 'g', 'ĥ' => 'h',
    'ħ' => 'h', 'ì' => 'i', 'í' => 'i', 'î' => 'i', 'ï' => 'i', 'ī' => 'i',
    'ĩ' => 'i', 'ĭ' => 'i', 'į' => 'i', 'ı' => 'i', 'ĳ' => 'ij', 'ĵ' => 'j',
    'ķ' => 'k', 'ĸ' => 'k', 'ł' => 'l', 'ľ' => 'l', 'ĺ' => 'l', 'ļ' => 'l',
    'ŀ' => 'l', 'ñ' => 'n', 'ń' => 'n', 'ň' => 'n', 'ņ' => 'n', 'ŉ' => 'n',
    'ŋ' => 'n', 'ò' => 'o', 'ó' => 'o', 'ô' => 'o', 'õ' => 'o', 'ö' => 'oe',
    '&ouml;' => 'oe', 'ø' => 'o', 'ō' => 'o', 'ő' => 'o', 'ŏ' => 'o', 'œ' => 'oe',
    'ŕ' => 'r', 'ř' => 'r', 'ŗ' => 'r', 'š' => 's', 'ù' => 'u', 'ú' => 'u',
    'û' => 'u', 'ü' => 'ue', 'ū' => 'u', '&uuml;' => 'ue', 'ů' => 'u', 'ű' => 'u',
    'ŭ' => 'u', 'ũ' => 'u', 'ų' => 'u', 'ŵ' => 'w', 'ý' => 'y', 'ÿ' => 'y',
    'ŷ' => 'y', 'ž' => 'z', 'ż' => 'z', 'ź' => 'z', 'þ' => 't', 'ß' => 'ss',
    'ſ' => 'ss', 'ый' => 'iy', 'А' => 'A', 'Б' => 'B', 'В' => 'V', 'Г' => 'G',
    'Д' => 'D', 'Е' => 'E', 'Ё' => 'YO', 'Ж' => 'ZH', 'З' => 'Z', 'И' => 'I',
    'Й' => 'Y', 'К' => 'K', 'Л' => 'L', 'М' => 'M', 'Н' => 'N', 'О' => 'O',
    'П' => 'P', 'Р' => 'R', 'С' => 'S', 'Т' => 'T', 'У' => 'U', 'Ф' => 'F',
    'Х' => 'H', 'Ц' => 'C', 'Ч' => 'CH', 'Ш' => 'SH', 'Щ' => 'SCH', 'Ъ' => '',
    'Ы' => 'Y', 'Ь' => '', 'Э' => 'E', 'Ю' => 'YU', 'Я' => 'YA', 'а' => 'a',
    'б' => 'b', 'в' => 'v', 'г' => 'g', 'д' => 'd', 'е' => 'e', 'ё' => 'yo',
    'ж' => 'zh', 'з' => 'z', 'и' => 'i', 'й' => 'y', 'к' => 'k', 'л' => 'l',
    'м' => 'm', 'н' => 'n', 'о' => 'o', 'п' => 'p', 'р' => 'r', 'с' => 's',
    'т' => 't', 'у' => 'u', 'ф' => 'f', 'х' => 'h', 'ц' => 'c', 'ч' => 'ch',
    'ш' => 'sh', 'щ' => 'sch', 'ъ' => '', 'ы' => 'y', 'ь' => '', 'э' => 'e',
    'ю' => 'yu', 'я' => 'ya'
  );

  public static function clean($string, $allowed=array(), $base="a-zA-Z0-9 "){
    if(empty($allowed) && !$base){ return false; }
    $ignore = "";
    if(is_array($allowed)){
      foreach($allowed as $a){
        $ignore .= preg_quote($a);
      }
    }
    return preg_replace( "/[^{$base}{$ignore}\s]/", "", $string );
  }

  public static function alphaNum($string, $allowed=array(), $convert=false){
    if($convert){
      $string = strtr($string, self::$cleanChars);
    }
    return self::clean($string, $allowed, 'a-zA-Z0-9 ');
  }

}

示例：

删除所有标点符号：

的ClassName :: alpaNum（$字符串）;

删除所有标点但转换特殊字符：

ClassName :: alphaNum（$ string，null，true）;

Alpha Num +额外的标点符号：

ClassName :: alphaNum（$ string，array（'_'，' - '，'，'，'。'））;

Alpha Num +额外的标点符号和转换：

ClassName :: alphaNum（$ string，array（'_'，' - '，'，'，'。'），true）;

结论：如果你期望特殊的字符并且不想完全丢弃它们，你可以在检查alphaNum之前转换它们。（例如，关于清理文件名等）。

如果丢弃特殊字符没有任何实际影响，并且在系统上没有预期，您可以在不转换标点符号的情况下调用它以节省处理能力。（例如，从字符串设置大型数组的键）

我从这里得到了cleanChars var：（我略微修改了它） https://github.com/vanillaforums/Garden/blob/master/library/core/class.format.php

如何在php中删除标点符号

6 个答案: