Multibyte String 函数
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mb_ereg_replace

(PHP 4 >= 4.2.0, PHP 5)

mb_ereg_replace — Replace regular expression with multibyte support

说明

string mb_ereg_replace ( string $pattern , string $replacement , string $string [, string $option = "msr" ] )

Scans string for matches to pattern, then replaces the matched text with replacement

参数

pattern

The regular expression pattern.

Multibyte characters may be used in pattern.

replacement

The replacement text.

string

The string being checked.

option
Matching condition can be set by option parameter. If i is specified for this parameter, the case will be ignored. If x is specified, white space will be ignored. If m is specified, match will be executed in multiline mode and line break will be included in '.'. If p is specified, match will be executed in POSIX mode, line break will be considered as normal character. If e is specified, replacement string will be evaluated as PHP expression.

返回值

The resultant string on success, or FALSE on error.

注释

Note:

mb_regex_encoding() 指定的内部编码或字符编码将会当作此函数用的字符编码。

Warning

处理非信任的输入时从不使用 e 修饰符，就不会转码(即调用 preg_replace())。不注意 这些会很可能会导致应用程序引发远程代码执行的漏洞。

Never use the e modifier when working on untrusted input. No automatic escaping will happen (as known from preg_replace()). Not taking care of this will most likely create remote code execution vulnerabilities in your application.

参见

Multibyte String 函数
在线手册：中文 英文
PHP手册
PHP手册 - N: Replace regular expression with multibyte support

用户评论:

trng (15-Jun-2011 05:22)

You can use \\n for capture group in replacement.
And you can NOT use $n notation (unlike preg_replace function).

Pluche (30-Dec-2010 12:17)

Unlike preg_replace, mb_ereg_replace doesn't use separators

Exemple with preg_replace :
<?php $data = preg_replace("/[^A-Za-z0-9\.\-]/","",$data); ?>

Exemple with mb_ereg_replace :
<?php $data = mb_ereg_replace("[^A-Za-z0-9\.\-]","",$data); ?>

daemoneye at gmail dot com (03-Feb-2009 10:53)

I got a pretty nasty error while trying to parse table rows(all contents were set to UTF-8) from the database for a dictionary project. The idea was to get all the rows from the first table (that is a table with bulgarian phrase in the first field, and its translation in english, french and german in the next fields). I needed to index all the bulgarian words that are found in the table to make an intelligent search. And that is where my headache started.

First of all, even with mb_strtolower() a lot of cyrillic characters went corrupted (ex: 'т,ъ,у,ф,б,г,з,ж,' etc...). After an hour of different attempts I got such a solution:

<?php

mb_internal_encoding("UTF-8");
mb_regex_encoding("UTF-8");

$rows = $db->getRows();

$contents = array();
foreach ($rows as $eachRow)
{
    $cleared = str_replace($commonWords, ' ', mb_strtolower(stripslashes($eachRow['bulgarian']), 'UTF-8' ));
    if (trim($cleared) != '') $contents[] = trim($cleared);
}   

$list = array();
foreach ($contents as $eachRow)
{
    $exploded = explode(' ', $eachRow);
    foreach ($exploded as $eachExpl)
    {
        $eachExpl = mb_ereg_replace('[^а-я ]',' ', $eachExpl);
        if (trim($eachExpl) != '')
            if (!in_array($eachExpl, $list, true))    $list[] = trim($eachExpl);
    }
}

?>

To work properly I got to set all the internal encoding settings to UTF-8. Else the default Latin-1 got half my database with missing characters.

I am posting this solution just in case someone has encountered a similar problem. Hope it helps you in case you need something like that.

keizo at gomo dot jp (24-Jul-2008 05:32)

<?php
$pattern = "([あ-ん]+)[0-9]+";
$string = mb_ereg_replace($pattern, '「\\1」:\\0', $string);
?>

you can use \\n for capture group in replacement

gmx dot net at ulrich dot mierendorff (01-Jul-2008 03:39)

If you want to replace characters like "?" or "?" you can use mb_ereg_replace, but it is very slow. str_replace is much faster and also works with characters like "?" or "?"!

I think this has something to with the fact that str_replace works on byte level and does not care about characters.
I hope that can help.

(04-Dec-2006 04:36)

'i' option does not work correctly with multibyte characters. The function does not locate/replace the multibyte string if it's different case then specified on multibyte needle which is in different case.

squeegee (01-Nov-2006 03:41)

well, if you just calculated the length of the find and replace strings once instead of on every loop, it would likely speed it up a lot.

mpnicholas [@t] gmail (dot) com (09-Jul-2006 11:09)

Regarding the mb_str_ireplace() function: I benchmarked it against mb_eregi_replace() for single-character substitution, and it was significantly slower. Despite avoiding the ereg call, I think the while loop ends slowing you down too much for this to be practical.

vondrej(at)gmail(dot)com (26-Feb-2006 11:47)

Are you looking for htmlentities() for multibyte strings? This might help you - it just replace <, >, ", '

<?php
/**
 *  Multibyte equivalent for htmlentities() [lite version :)]
 *
 * @param string $str
 * @param string $encoding
 * @return string
 **/
function mb_htmlentities($str, $encoding = 'utf-8') {
    mb_regex_encoding($encoding);
    $pattern = array('<', '>', '"', '\'');
    $replacement = array('&lt;', '&gt;', '&quot;', '&#39;');
    for ($i=0; $i<sizeof($pattern); $i++) {
        $str = mb_ereg_replace($pattern[$i], $replacement[$i], $str);
    }
    return $str;
}
?>

faxe at neostrada dot pl (09-Aug-2005 11:52)

A simple mb_str_ireplace() implementation - a faster (?) replacement for non-regexp multi-byte string replacement:

<?php
function mb_str_ireplace($co, $naCo, $wCzym)
{
    $wCzymM = mb_strtolower($wCzym);
    $coM    = mb_strtolower($co);
    $offset = 0;
   
        while(!is_bool($poz = mb_strpos($wCzymM, $coM, $offset)))
    {
        $offset = $poz + mb_strlen($naCo);
        $wCzym = mb_substr($wCzym, 0, $poz). $naCo .mb_substr($wCzym, $poz+mb_strlen($co));
        $wCzymM = mb_strtolower($wCzym);
    }
   
    return $wCzym;
}
?>

[thiago - EDITOR NOTE: This function has improvements from d-okumura [aat] fi{dot}kyd[dot]co.jp]