奇怪的事情与CTYPE_ALNUM [英] Strange thing With CTYPE_ALNUM

问题描述

我有这个PHP函数CTYPE_ALNUM的奇怪问题如果我这样做的话：
$ b

PHP： / p>

  $ words =àòè; 
 
 
 if（ctype_alnum（$ words））{
 
回声不要工作; 
 
} else {
 
回声工作; 
 
} 
  

这会回应'Work'

但是如果我有一个表格，并且以这种形式插入带有坟墓的字母（à，è，ò），这会回应出'Do not Work'。

代码：

 < form action =method =post> 
 
< input type =textname =words/> 
< input type =submit/> 
 
< / form> 
 
 
 $ words = $ _ POST ['words']; 
 
 if（isset（$ words））{
 
 if（ctype_alnum（$ words））{
 
回声不工作; 
 
} else {
 
回声工作; 
 
} 
 
} 
  

如果我插入输入文字输入字母à或è或ò这会回显出'Do not Work'。

解决方案

ctype_alnum 是locale-dependend。这意味着如果您使用标准的 C 语言环境或者像 en_US 这样的常用语言环境，字母，只有 [A-Za-z] 。您可以尝试将语言环境设置为可通过 setlocale （注意区域设置需要安装在您的系统上，而不是所有的系统都一样），或者使用更便携的解决方案，如：

 函数ctype_alnum_portable（$ text）{
 return（preg_match（'〜^ [0-9a-z] * $〜iu'，$ text） > 0）; 
} 
  

i have this strange problem with the PHP function CTYPE_ALNUM

if i do:

PHP:

$words="àòè";


if(ctype_alnum($words)){

   Echo "Don't work";

}else{

   Echo "Work";     

}

this will echo out 'Work'

BUT if i have a form and in that form i insert the letters with the grave like (à , è, ò) this will echo out 'Don't Work'

Code:

  <form action="" method="post"> 

    <input type="text" name="words" />
    <input type="submit" />

  </form>


 $words=$_POST['words'];

 if(isset($words)){

  if(ctype_alnum($words)){

      Echo "Don't Work";

  }else{

      Echo "Work";      

 }

}

If i insert into the text input the letters à or è or ò This will echo out 'Don't Work'

解决方案

ctype_alnum is locale-dependend. That means if you're using the standard C locale or a common one like en_US, that won't match accented letters, only [A-Za-z]. You can try setting the locale to a language that recognizes those derivations via setlocale (beware that the locale needs to be installed on your system, and not all systems are alike), or use a more portable solution like:

function ctype_alnum_portable($text) {
    return (preg_match('~^[0-9a-z]*$~iu', $text) > 0);
}

这篇关于奇怪的事情与CTYPE_ALNUM的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！