对于中英文特殊符号的匹配过滤，在少量的文本查找时，使用正则表达式方法简单方便，但是面对大文本的处理则性能瓶颈将导致其无法实用。此时使用逐字符替换方法则是速度性能最快的。
下面为PHP实现的中英文字符过滤方法，仅供参考。
1. PHP实现中文特殊字符转换与英文字符过滤
XML/HTML代码
- /*
- 中英文特殊字符转换与过滤
- */
- function clear_punctuation($str)
- {
- $arr = array(
- '０' => '0', '１' => '1', '２' => '2', '３' => '3', '４' => '4',
- '５' => '5', '６' => '6', '７' => '7', '８' => '8', '９' => '9',
- 'Ａ' => 'A', 'Ｂ' => 'B', 'Ｃ' => 'C', 'Ｄ' => 'D', 'Ｅ' => 'E',
- 'Ｆ' => 'F', 'Ｇ' => 'G', 'Ｈ' => 'H', 'Ｉ' => 'I', 'Ｊ' => 'J',
- 'Ｋ' => 'K', 'Ｌ' => 'L', 'Ｍ' => 'M', 'Ｎ' => 'N', 'Ｏ' => 'O',
- 'Ｐ' => 'P', 'Ｑ' => 'Q', 'Ｒ' => 'R', 'Ｓ' => 'S', 'Ｔ' => 'T',
- 'Ｕ' => 'U', 'Ｖ' => 'V', 'Ｗ' => 'W', 'Ｘ' => 'X', 'Ｙ' => 'Y',
- 'Ｚ' => 'Z', 'ａ' => 'a', 'ｂ' => 'b', 'ｃ' => 'c', 'ｄ' => 'd',
- 'ｅ' => 'e', 'ｆ' => 'f', 'ｇ' => 'g', 'ｈ' => 'h', 'ｉ' => 'i',
- 'ｊ' => 'j', 'ｋ' => 'k', 'ｌ' => 'l', 'ｍ' => 'm', 'ｎ' => 'n',
- 'ｏ' => 'o', 'ｐ' => 'p', 'ｑ' => 'q', 'ｒ' => 'r', 'ｓ' => 's',
- 'ｔ' => 't', 'ｕ' => 'u', 'ｖ' => 'v', 'ｗ' => 'w', 'ｘ' => 'x',
- 'ｙ' => 'y', 'ｚ' => 'z',
- '（' => '', '）' => '', '〔' => '', '〕' => '', '【' => '',
- '】' => '', '〖' => '', '〗' => '', '“' => '', '”' => '',
- '‘' => '', '’' => '', '｛' => '', '｝' => '', '《' => '',
- '》' => '',
- '％' => '', '＋' => '', '—' => '', '－' => '', '～' => '',
- '：' => '', '。' => '', '、' => '', '，' => '', '、' => '',
- '；' => '', '？' => '', '！' => '', '…' => '', '‖' => '',
- '”' => '', '’' => '', '‘' => '', '｜' => '', '〃' => '',
- ' ' => '', '＄'=>'', '＠'=>'', '＃'=>'', '＾'=>'', '＆'=>'', '＊'=>'',
- '(' => '', ')' => '', '[' => '', ']' => '', '`' => '', '{' => '', '~' => '',
- '}' => '', '<' => '', '>' => '', '%' => '', '+' => '', '-' => '', ':' => '',
- '.' => '', ';' => '', '?' => '', '!' => '', '|' => '', '$' => '', '@' => '',
- '#' => '', '^' => '', '&' => '', '*' => '', '\' => '','"' => '', ''' => '',
- '=' => '', '/' => '', ' ' => ''
- );
- return strtr($str, $arr);
- }
2. PHP中文双字节字符转换为英文字符
XML/HTML代码
- /*
- 中文字符转换为英文字符
- */
- function make_semiangle($str)
- {
- $arr = array('０' => '0', '１' => '1', '２' => '2', '３' => '3', '４' => '4',
- '５' => '5', '６' => '6', '７' => '7', '８' => '8', '９' => '9',
- 'Ａ' => 'A', 'Ｂ' => 'B', 'Ｃ' => 'C', 'Ｄ' => 'D', 'Ｅ' => 'E',
- 'Ｆ' => 'F', 'Ｇ' => 'G', 'Ｈ' => 'H', 'Ｉ' => 'I', 'Ｊ' => 'J',
- 'Ｋ' => 'K', 'Ｌ' => 'L', 'Ｍ' => 'M', 'Ｎ' => 'N', 'Ｏ' => 'O',
- 'Ｐ' => 'P', 'Ｑ' => 'Q', 'Ｒ' => 'R', 'Ｓ' => 'S', 'Ｔ' => 'T',
- 'Ｕ' => 'U', 'Ｖ' => 'V', 'Ｗ' => 'W', 'Ｘ' => 'X', 'Ｙ' => 'Y',
- 'Ｚ' => 'Z', 'ａ' => 'a', 'ｂ' => 'b', 'ｃ' => 'c', 'ｄ' => 'd',
- 'ｅ' => 'e', 'ｆ' => 'f', 'ｇ' => 'g', 'ｈ' => 'h', 'ｉ' => 'i',
- 'ｊ' => 'j', 'ｋ' => 'k', 'ｌ' => 'l', 'ｍ' => 'm', 'ｎ' => 'n',
- 'ｏ' => 'o', 'ｐ' => 'p', 'ｑ' => 'q', 'ｒ' => 'r', 'ｓ' => 's',
- 'ｔ' => 't', 'ｕ' => 'u', 'ｖ' => 'v', 'ｗ' => 'w', 'ｘ' => 'x',
- 'ｙ' => 'y', 'ｚ' => 'z',
- '（' => '(', '）' => ')', '〔' => '[', '〕' => ']', '【' => '[',
- '】' => ']', '〖' => '[', '〗' => ']', '“' => '[', '”' => ']',
- '‘' => '[', '’' => ']', '｛' => '{', '｝' => '}', '《' => '<',
- '》' => '>',
- '％' => '%', '＋' => '+', '—' => '-', '－' => '-', '～' => '-',
- '：' => ':', '。' => '.', '、' => '\', '，' => '.', '、' => '.',
- '；' => ';', '？' => '?', '！' => '!', '…' => '-', '‖' => '|',
- '”' => '"', '’' => '`', '‘' => '`', '｜' => '|', '〃' => '"',
- ' ' => ' ', '＄'=>'$', '＠'=>'@', '＃'=>'#', '＾'=>'^', '＆'=>'&', '＊'=>'*');
- //foreach($arr as $k=>$v)
- //echo $v;
- return strtr($str, $arr);
- }
3. PHP正则表达式过滤英文标点符号
XML/HTML代码
- $pattern = "/[ '.,:;*?~`!@#$%^&+=-)(<>{}]|]|[|/|\|"||/";
- $content = preg_replace($pattern, '', $content); //英文符号过滤
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字符过滤起来很有意思的。。。很考验脑力。