php字符串全角与半角转换：字符串全角字符转换为半角字符

/**
 * 将一个字串中含有全角的数字字符、字母、空格或'%+-()'字符转换为相应半角字符
 * @access  public
 * @param   string   $str 待转换字串
 * @return  string   $str 处理后字串
*/
function make_semiangle($str){
$arr = array('０' => '0', '１' => '1', '２' => '2', '３' => '3', '４' => '4',
 '５' => '5', '６' => '6', '７' => '7', '８' => '8', '９' => '9',
 'Ａ' => 'A', 'Ｂ' => 'B', 'Ｃ' => 'C', 'Ｄ' => 'D', 'Ｅ' => 'E',
 'Ｆ' => 'F', 'Ｇ' => 'G', 'Ｈ' => 'H', 'Ｉ' => 'I', 'Ｊ' => 'J',
 'Ｋ' => 'K', 'Ｌ' => 'L', 'Ｍ' => 'M', 'Ｎ' => 'N', 'Ｏ' => 'O',
 'Ｐ' => 'P', 'Ｑ' => 'Q', 'Ｒ' => 'R', 'Ｓ' => 'S', 'Ｔ' => 'T',
 'Ｕ' => 'U', 'Ｖ' => 'V', 'Ｗ' => 'W', 'Ｘ' => 'X', 'Ｙ' => 'Y',
 'Ｚ' => 'Z', 'ａ' => 'a', 'ｂ' => 'b', 'ｃ' => 'c', 'ｄ' => 'd',
 'ｅ' => 'e', 'ｆ' => 'f', 'ｇ' => 'g', 'ｈ' => 'h', 'ｉ' => 'i',
 'ｊ' => 'j', 'ｋ' => 'k', 'ｌ' => 'l', 'ｍ' => 'm', 'ｎ' => 'n',
 'ｏ' => 'o', 'ｐ' => 'p', 'ｑ' => 'q', 'ｒ' => 'r', 'ｓ' => 's',
 'ｔ' => 't', 'ｕ' => 'u', 'ｖ' => 'v', 'ｗ' => 'w', 'ｘ' => 'x',
 'ｙ' => 'y', 'ｚ' => 'z',
 '（' => '(', '）' => ')', '〔' => '[', '〕' => ']', '【' => '[',
 '】' => ']', '〖' => '[', '〗' => ']', '"' => '[', '"' => ']',
 ''' => '[', ''' => ']', '｛' => '{', '｝' => '}', '《' => '<',
 '》' => '>',
 '％' => '%', '＋' => '+', '—' => '-', '－' => '-', '～' => '-',
 '：' => ':', '。' => '.', '、' => ',', '，' => '.', '、' => '.',
 '；' => ',', '？' => '?', '！' => '!', '…' => '-', '‖' => '|',
 '"' => '"', ''' => '`', ''' => '`', '｜' => '|', '〃' => '"',
 '　' => ' ');
return strtr($str, $arr);
}