允许字符串中的字符（剥离它） [英] allowed characters in a string (stripping it)

问题描述

我想要一组允许的字符，并从除了那些之外的所有内容中删除一个字符串

。


我'尝试过并试过但是每次我输入包含

unicode的字符串时，它都会发疯并输出没有意义。


我很有信心我错过了什么，但不知道是什么。


$ ACCENTED_ALL_LOW ="？*？¨??? 2？1 ????? *？3？o？¢ ？一个？？？'？？？ ¤???ˉ???????£μ±§|？？？？？？？¥????????? * ??????? * ??é???" ; ;

$ ACCENTED_ALL_BIG =  ????????????????????????????????????? ????????????????????????????????????一个???????一个????" ; ;

$ ACCENTED_ALL = $ ACCENTED_ALL_LOW。$ ACCENTED_ALL_BIG;

$ ALPHABET_LOW =" qwertyuiopasdfghjklzxcvbnm";

$ ALPHABET_BIG =" QWERTYUIOPASDFGHJKLZXCVBNM" ;;

$ ALPHABET_ALL = $ ALPHABET_LOW。$ ALPHABET_BIG;

$ SYMBOLS_NAME =" .''-" ;;


first时间我尝试使用这样的东西：

$ name = preg_replace（" /（[a-zA-Z] | - | [$ al]）| ./& quot ;,'''1' '，$ name）;

（记住我做*不*知道regexp，朋友写了这行）


现在我尝试使用str_split ：

函数clear_name_complex（$ name，$ ok_chars）{

$ ass = str_split（$ ok_chars）;

$ al = array（） ;

foreach（$ ass as $ a）{

$ al [$ a] = TRUE;

}


$ s = str_split（$ name）;

$ ret ="" ;;

foreach（$ s as $ c）{

如果（！$ al [$ c]）继续;

$ ret。= $ c;

}


返回$ ret;

}


仍然没有。

unicode，它发疯了，输出没有意义。

我相信这是因为在这两种情况下它都会对待unicode字符

分成单个字节，但是，我对我应该做什么不知道怎么做。

解决方案

ACCENTED_ALL_LOW = QUOT;？？？？？？？*¨??? 2 1 ????? * 3 O¢一???'??? ¤???ˉ???????£μ±§|？？？？？？？¥????????? * ??????? * ??é???" ; ;

ACCENTED_ALL_BIG =&＃; ???????????????????????????????? ？ ????????????????????????????????????一个???????一个????" ; ;

ACCENTED_ALL =

I''d like to have a set of "allowed characters", and strip a string
from everything besides those.

I''ve tried and tried but so far every time I enter strings containing
unicode, it goes mad and output makes no sense.

I''m sure I''m missing something but no idea what.

$ACCENTED_ALL_LOW="?*?¨???2?1?????*?3?o?￠?a???′??? ¤???ˉ???????￡?μ?±?§?|???￥?????????*???????*??é???" ;
$ACCENTED_ALL_BIG="??????????????????????????????? ????????????????????????????????????a???????a????" ;
$ACCENTED_ALL=$ACCENTED_ALL_LOW.$ACCENTED_ALL_BIG;
$ALPHABET_LOW="qwertyuiopasdfghjklzxcvbnm";
$ALPHABET_BIG="QWERTYUIOPASDFGHJKLZXCVBNM";
$ALPHABET_ALL=$ALPHABET_LOW.$ALPHABET_BIG;
$SYMBOLS_NAME=".''- ";

first time I tried using something like this:
$name=preg_replace("/([a-zA-Z]|-|[$al])|./",''$1'',$name);
(bear in mind I do *NOT* know regexp, a friend wrote this line)

now I tried instead using str_split:
function clear_name_complex ($name, $ok_chars) {
$ass=str_split($ok_chars);
$al=array();
foreach ($ass as $a) {
$al[$a]=TRUE;
}

$s=str_split($name);
$ret="";
foreach ($s as $c) {
if (!$al[$c]) continue;
$ret.=$c;
}

return $ret;
}

still nothing.
unicode, and it goes mad and output makes no sense.
I belive that''s because in both cases it treats unicode characters
splitting into single bytes, but still, I''m clueless about what am I
supposed to do.

解决方案

ACCENTED_ALL_LOW="?*?¨???2?1?????*?3?o?￠?a???′??? ¤???ˉ???????￡?μ?±?§?|???￥?????????*???????*??é???" ;

ACCENTED_ALL_BIG="??????????????????????????????? ????????????????????????????????????a???????a????" ;

ACCENTED_ALL=

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