在PHP中使用文件和utf8 [英] Working with files and utf8 in PHP

问题描述

  aoeu 
 qjkx $ b $可以说我有一个名为foo.txt的文件bñpy
  

我想得到一个包含该文件中所有行的数组（每行一行索引），其中包含字母aoeuñpyf，只有这些字母的行。

我写了下面的代码（也编码为utf8）：

  $ allowed_letters = array（a，o，e，u， - ，p，y， F）; 
 
 $ lines = array（）; 
 $ f = fopen（foo.txt，r）; 
 while（！feof（$ f））{
 $ line = fgets（$ f）; 
 foreach（preg_split（//，$ line，-1，PREG_SPLIT_NO_EMPTY）as $ letter）{
 if（！in_array（$ letter，$ allowed_letters））{
 $ line = ; 
 
 
 if（$ line！=）{
 $ lines [] = $ line; 
} 
} 
 fclose（$ f）; 
  

然而， $ lines 数组只是有它的aoeu线。

这似乎是因为不知何故，在code$ allowed_letters 中的ñ是不一样的 ñin foo.txt。

同样，如果我打印一个文件ñ，会出现一个问号，但是如果我这样打印 printñ; ，它的工作原理。

如何让它工作？

解决方案

你正在运行Windows，操作系统不保存文件在UTF-8，但在cp1251（或其他...）默认情况下，您需要以该格式显式保存该文件或运行 utf8_encode （）在执行检查之前。 I $。：

$ $ $ $ $ $ $ $ $ $ $ = $ utf8_encode（fgets（$ f））;

如果您确定该文件是UTF-8编码，那么您的PHP文件也是UTF-8如果一切都是UTF-8，那么这就是你所需要的：

  
> 
 code> foreach（preg_split（// u，$ line，-1，PREG_SPLIT_NO_EMPTY）as $ letter）{
 // ... 
} 
  
 
 （为Unicode码字符追加 u ）然而，让我建议一个更快的方式来执行您的检查：
 
 
  $ allowed_letters =阵列（ 一， O， E， U， N， p， Y， F）; 
 
 $ lines = array（）; 
 $ f = fopen（foo.txt，r）; 
 while（！feof（$ f））{
 $ line = fgets（$ f）; 
 
 $ line = str_split（rtrim（$ line））; 
 if（count（array_intersect（$ line，$ allowed_letters））== count（$ line））{
 $ lines [] = $ line; 
} 
} 
 fclose（$ f）; 
  
（添加空格字符以允许空格字符，并删除 rtrim （$ line））
 
Lets say I have a file called foo.txt encoded in utf8:
aoeu  
qjkx
ñpyf
And I want to get an array that contains all the lines in that file (one line per index) that have the letters aoeuñpyf, and only the lines with these letters.

I wrote the following code (also encoded as utf8):
$allowed_letters=array("a","o","e","u","ñ","p","y","f");

$lines=array();
$f=fopen("foo.txt","r");
while(!feof($f)){
    $line=fgets($f);
    foreach(preg_split("//",$line,-1,PREG_SPLIT_NO_EMPTY) as $letter){
        if(!in_array($letter,$allowed_letters)){
            $line="";
        }
    }
    if($line!=""){
        $lines[]=$line;
    }
}
fclose($f);
However, after that, the $lines array just has the aoeu line in it.

This seems to be because somehow, the "ñ" in $allowed_letters is not the same as the "ñ" in foo.txt.

Also if I print a "ñ" of the file, a question mark appears, but if I print it like this print "ñ";, it works.

How can I make it work?
解决方案
If you are running Windows, the OS does not save files in UTF-8, but in cp1251 (or something...) by default you need to save the file in that format explicitly or run each line in utf8_encode() before performing your check. I.e.:
$line=utf8_encode(fgets($f));
If you are sure that the file is UTF-8 encoded, is your PHP file also UTF-8 encoded?

If everything is UTF-8, then this is what you need :
foreach(preg_split("//u",$line,-1,PREG_SPLIT_NO_EMPTY) as $letter){
   // ...
}
(append u for unicode chars)

However, let me suggest a yet faster way to perform your check :
$allowed_letters=array("a","o","e","u","ñ","p","y","f");

$lines=array();
$f=fopen("foo.txt","r");
while(!feof($f)){
    $line=fgets($f);

    $line = str_split(rtrim($line));
    if (count(array_intersect($line, $allowed_letters)) == count($line)) {
            $lines[] = $line;
    }
}
fclose($f);
(add space chars to allow space characters as well, and remove the rtrim($line))

                        
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