multibyte strtr() - > mb_strtr()

时间:2010-05-03 14:30:12

标签: php string multibyte

有没有人写过函数strtr()的多字节变体?我需要这个。

编辑1(所需用法示例):

Example:
$from = 'ľľščťžýáíŕďňäô'; // these chars are in UTF-8
$to   = 'llsctzyaiŕdnao';

// input - in UTF-8
$str  = 'Kŕdeľ ďatľov učí koňa žrať kôru.';
$str  = mb_strtr( $str, $from, $to );

// output - str without diacritic
// $str = 'Krdel datlov uci kona zrat koru.';

3 个答案:

答案 0 :(得分:24)

相信 strtr is multi-byte safe,无论哪种方式,因为str_replace 多字节安全,你可以把它包起来:

function mb_strtr($str, $from, $to)
{
  return str_replace(mb_str_split($from), mb_str_split($to), $str);
}

由于没有mb_str_split功能,您还需要编写自己的功能(使用mb_substrmb_strlen),或者您可以使用PHP UTF-8实施(稍微更改) ):

function mb_str_split($str) {
    return preg_split('~~u', $str, null, PREG_SPLIT_NO_EMPTY);;

}

但是,如果您正在寻找从字符串中删除所有(拉丁?)重音的功能,您可能会发现以下功能有用:

function Unaccent($string)
{
    return preg_replace('~&([a-z]{1,2})(?:acute|cedil|circ|grave|lig|orn|ring|slash|th|tilde|uml|caron);~i', '$1', htmlentities($string, ENT_QUOTES, 'UTF-8'));
}

echo Unaccent('ľľščťžýáíŕďňä'); // llsctzyairdna
echo Unaccent('Iñtërnâtiônàlizætiøn'); // Internationalizaetion

答案 1 :(得分:2)

function mb_strtr($str,$map,$enc){
$out="";
$strLn=mb_strlen($str,$enc);
$maxKeyLn=1;
foreach($map as $key=>$val){
    $keyLn=mb_strlen($key,$enc);
    if($keyLn>$maxKeyLn){
        $maxKeyLn=$keyLn;
    }
}
for($offset=0; $offset<$strLn; ){
    for($ln=$maxKeyLn; $ln>=1; $ln--){
        $cmp=mb_substr($str,$offset,$ln,$enc);
        if(isset($map[$cmp])){
            $out.=$map[$cmp];
            $offset+=$ln;
            continue 2;
        }
    }
    $out.=mb_substr($str,$offset,1,$enc);
    $offset++;
}
return $out;
}

答案 2 :(得分:1)

可能使用str_replace是一个很好的解决方案。另一种选择:

<?php
header('Content-Type: text/plain;charset=utf-8');

function my_strtr($inputStr, $from, $to, $encoding = 'UTF-8') {
        $inputStrLength = mb_strlen($inputStr, $encoding);

        $translated = '';

        for($i = 0; $i < $inputStrLength; $i++) {
                $currentChar = mb_substr($inputStr, $i, 1, $encoding);

                $translatedCharPos = mb_strpos($from, $currentChar, 0, $encoding);

                if($translatedCharPos === false) {
                        $translated .= $currentChar;
                }
                else {
                        $translated .= mb_substr($to, $translatedCharPos, 1, $encoding);
                }
        }

        return $translated;
}


$from = 'ľľščťžýáíŕďňä'; // these chars are in UTF-8
$to   = 'llsctzyairdna';

// input - in UTF-8
$str  = 'Kŕdeľ ďatľov učí koňa žrať kôru.';

print 'Original: ';
print chr(10);
print $str;

print chr(10);
print chr(10);

print 'Tranlated: ';
print chr(10);
print my_strtr( $str, $from, $to);

使用PHP 5.2在我的机器上打印:

Original: 
Kŕdeľ ďatľov učí koňa žrať kôru.

Tranlated: 
Krdel datlov uci kona zrat kôru.