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This document uses PHP Chinese website manual Release
(PHP 4 >= 4.2.0, PHP 5)
mb_ereg_replace — Replace regular expression with multibyte support
$pattern
, string $replacement
, string $string
[, string $option
= "msr"
] )
Scans string
for matches to
pattern
, then replaces the matched text
with replacement
pattern
The regular expression pattern.
Multibyte characters may be used in pattern
.
replacement
The replacement text.
string
The string being checked.
option
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.
The resultant string on success, or FALSE
on error.
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。
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。
[#1] marco at thenetworksolution dot it [2014-02-03 14:47:54]
To selectively uppercase parts of a string via mb_eregi_replace
$str = mb_eregi_replace('\b([0-9]{1,4}[a-z]{1,2})\b', "strtoupper
('\\1')", $str, 'e');
Full example, how to fix an address manually typed, uppercasing the first letter of a words and keeping uppercase roman numerals and the letters A,B,C after the house number):
function ucAddress($str) {
// first lowercase all and use the default ucwords
$str = ucwords(strtolower($str));
// let's fix the default ucwords...
// uppercase letters after house number (was lowercased by the strtolower above)
$str = mb_eregi_replace('\b([0-9]{1,4}[a-z]{1,2})\b', "strtoupper
('\\1')", $str, 'e');
// the same for roman numerals
$str = mb_eregi_replace('\bM{0,4}(CM|CD|D?C{0,3})(XC|XL|L?X{0,3})(IX|IV|V?I{0,3})\b', "strtoupper('\\0')", $str, 'e');
return $str;
}
Dr. Marco Marsala
Network Solution srl
http://www.realizzazionesitigenova.it
[#2] marco at thenetworksolution dot it [2014-02-03 14:47:37]
To selectively uppercase parts of a string via mb_eregi_replace
$str = mb_eregi_replace('\b([0-9]{1,4}[a-z]{1,2})\b', "strtoupper
('\\1')", $str, 'e');
Full example, how to fix an address manually typed, uppercasing the first letter of a words and keeping uppercase roman numerals and the letters A,B,C after the house number):
function ucAddress($str) {
// first lowercase all and use the default ucwords
$str = ucwords(strtolower($str));
// let's fix the default ucwords...
// uppercase letters after house number (was lowercased by the strtolower above)
$str = mb_eregi_replace('\b([0-9]{1,4}[a-z]{1,2})\b', "strtoupper
('\\1')", $str, 'e');
// the same for roman numerals
$str = mb_eregi_replace('\bM{0,4}(CM|CD|D?C{0,3})(XC|XL|L?X{0,3})(IX|IV|V?I{0,3})\b', "strtoupper('\\0')", $str, 'e');
return $str;
}
[#3] trng [2011-06-15 09:22:22]
You can use \\n for capture group in replacement.
And you can NOT use $n notation (unlike preg_replace function).
[#4] Pluche [2010-12-30 04:17:08]
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); ?>
[#5] daemoneye at gmail dot com [2009-02-03 02:53:20]
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: '??,??,??,??,??,??,??,??,' 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('[^??-?? ]',' ', $eachExpl);
if (trim($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.
[#6] keizo at gomo dot jp [2008-07-23 21:32:30]
<?php
$pattern = "([??-??]+)[0-9]+";
$string = mb_ereg_replace($pattern, '??\\1??:\\0', $string);
?>
you can use \\n for capture group in replacement
[#7] gmx dot net at ulrich dot mierendorff [2008-07-01 07:39:43]
If you want to replace characters like "?" or "?" you can use mb_ereg_replace, but it is very slow. str_replace is much faster and also works with characters like "?" or "?"!
I think this has something to with the fact that str_replace works on byte level and does not care about characters.
I hope that can help.
[#8] [2006-12-04 08:36:33]
'i' option does not work correctly with multibyte characters. The function does not locate/replace the multibyte string if it's different case then specified on multibyte needle which is in different case.
[#9] squeegee [2006-11-01 07:41:01]
well, if you just calculated the length of the find and replace strings once instead of on every loop, it would likely speed it up a lot.
[#10] mpnicholas [@t] gmail (dot) com [2006-07-09 15:09:53]
Regarding the mb_str_ireplace() function: I benchmarked it against mb_eregi_replace() for single-character substitution, and it was significantly slower. Despite avoiding the ereg call, I think the while loop ends slowing you down too much for this to be practical.
[#11] vondrej(at)gmail(dot)com [2006-02-26 15:47:52]
Are you looking for htmlentities() for multibyte strings? This might help you - it just replace <, >, ", '
<?php
function mb_htmlentities($str, $encoding = 'utf-8') {
mb_regex_encoding($encoding);
$pattern = array('<', '>', '"', '\'');
$replacement = array('<', '>', '"', ''');
for ($i=0; $i<sizeof($pattern); $i++) {
$str = mb_ereg_replace($pattern[$i], $replacement[$i], $str);
}
return $str;
}
?>
[#12] faxe at neostrada dot pl [2005-08-09 15:52:41]
A simple mb_str_ireplace() implementation - a faster (?) replacement for non-regexp multi-byte string replacement:
<?php
function mb_str_ireplace($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]